Global ranking of Top 500 influencers and players active on Twitter in Building Services – those who are involved with services and facilities, RACHP, ventilation, heating, plumbing and pipework. Players listed on the leaderboard range from contractors, sub-contractors and specialist contractors, via government and campaigning organisations, to market-leading engineers; from those concerned with policy and best practice, business strategies and design solutions; to innovators in technology and materials. Weekly update day: Wednesday.

Curated and Managed by Jim McClelland @SustMeme, the data is published by McClelland Media Ltd, in association with the BESA @BESAGroup. The Building Engineering Services Association (BESA) has evolved throughout the years to reflect the growing needs of its members, encompassing the specialist services available within the built environment. BESA has a proud heritage and has been most notably known as the Heating and Ventilating Contractors’ Association (HVCA) for nearly 50 years. BESA offers specialist services and advice, training and sector-specific apprenticeships – all tailored to support its entire membership, ranging from micro enterprises to the largest organisations within the industry.

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The Top 500 ranks Players on the basis of scores that measure interactions and influence across social media, with the metrics provided predominantly via leading independent platform Kred, plus an additional custom element.

To nominate a person or organisation for potential inclusion on this ranking, please simply Tweet the Twitter Username of the nominee to @SustMemeTop500, using the hashtag #Top500ADDBuildingServices.

To view other sectors for which SustMeme rankings are published please return to the main Top 500 menu. For all news of Top 500 releases, updates and peer group notifications, please Follow dedicated Twitter feed: @SustMemeTop500.

To access and learn more about the full range of Top 500 Player options, please see the SustMeme User Guide, plus visit the Building Services Top 500 host platform direct.

SustMeme Building Services

5:00am, 18th Sep 2019
  Follow

Rank	Player	Index
1. (1)	Schneider Electric We embrace our purpose to make energy mean something. A digitized, sustainable energy landscape is what we’re building for people, homes, and business.	982
2. (2)	IET The Institution of Engineering and Technology (IET) is a diverse home for engineering and technology across the world. http://t.co/u0zsh7Gm	970
3. (3)	Atkins Official account of Atkins, member of @SNCLavalin, one of the world’s most respected design, engineering and project management consultancies.	929
4. (4)	Arup Designers, planners, engineers, consultants & technical specialists shaping a better world.	926
5. (5)	AECOM AECOM is a global network of design, engineering, construction and management professionals partnering with clients to imagine and deliver a better world.	914
6. (6)	SiemensUSA Unlocking the potential of digital transformation to positively impact society. #SiemensUSA	906
7. (7)	Vaillant UK Vaillant is one of Europe's largest heating technology manufacturers. We monitor this page during office hours. For customer service, please call 0344 736 0049	902
8. (9)	IWFM The Institute of Workplace and Facilities Management (IWFM) is the professional body for workplace and facilities practitioners.	893
9. (10)	The IMechE Team We're the Institution of Mechanical Engineers (IMechE), and we're raising the profile of mechanical engineering.	892
10. (8)	Janet T Beckett Chartered Engineer, HVAC & Low Carbon building designer, I work in construction. Democratic Socialist.	889
11. (11)	PHPI Magazine The UK’s biggest heating & plumbing mag. Likes/RTs ≠ endorsements #InstallOfFame https://t.co/HbeyOxW1yK https://t.co/SDfKMtFdlY	886
12. (13)	CIBSE Chartered Institution of Building Services Engineers: dedicated to improving building performance through engineering excellence.	885
13. (12)	Mitsubishi Electric Experience total home comfort while conserving energy and filtering allergens — all at the touch of a button. #MakeYourselfComfortable	885
14. (14)	Daikin India Daikin India is one of the leading manufacturers of air-conditioners in the commercial and residential segment today. You can talk to us here. 🙂	881
15. (15)	Mitie The UK’s leading Facilities Management business delivering the exceptional, every day: #ConnectedWorkspace - Social media team here 9am - 5:30pm, Mon-Fri.	880
16. (16)	Electrical Safety First We're Electrical Safety First (formerly Electrical Safety Council), a UK charity aiming to reduce the number of deaths & injuries caused by electrical accidents	876
17. (17)	Installer Magazine Installer is essential reading for heating, plumbing and renewable professionals.	871
18. (18)	Honeywell Keeping you up to date with what’s going on at Honeywell.	863
19. (19)	Saint-Gobain Designs, manufactures + distributes materials + solutions which are key ingredients in the wellbeing of each of us and the future of all. Improving Daily Lives.	860
20. (20)	IFMA Facility managers improve business and our lives. We help them make it possible.	859
21. (24)	Arcadis UK Arcadis is the leading global natural and built asset design and consultancy firm. LinkedIn: Arcadis United Kingdom	849
22. (23)	Baxi High efficiency boilers manufactured in UK with national aftersales from Baxi Customer Support & Baxi Genuine Parts Tel 0330 678 0917 Mon-Fri 8-8 Sat-Sun 8.30-2	848
23. (22)	Passivhaus Trust Leading the way in the UK for adoption of the #Passivhaus standard. UK affiliate of @the_iPHA.	848
24. (21)	Facilitate Magazine Monthly in print and daily online, Facilitate is the magazine of @IWFM_UK – the Institute of Workplace and Facilities Management. Visit @IWFM_Jobs for careers.	847
25. (27)	Nathan James Van Gambling BA Hon. Plumbing, Heating & Energy Lecturer. Speaker at trade events & @lowcarbonhomes. #learning consultant & podcaster https://t.co/7KB2Kpaato #solarheat #betatalk ☀️	841
26. (29)	Simon Owen Built environment recruiter, @CIBSEYrksAwards organiser, @CIBSE Yorkshire region committee member and #cycling obsessive.	840
27. (25)	AHR Expo Updates from the world's largest HVACR marketplace; a spectacular trade event held annually in cities across the U.S. #AHRexpo #HVACR #HVAC	840
28. (26)	The NEWS Follow for breaking news, products, articles, and HVACR events. Polls, surveys, community discussion, and open forums are integral parts of our Twitter feed.	840
29. (28)	Official NICEIC News, views and information from NICEIC, the UK's leading registration body for the electrical contracting industry. Always choose an NICEIC contractor.	837
30. (31)	Leviton Leading manufacturer of electrical wiring devices, lighting controls, network solutions, electric vehicle supply equipment & automation. Join us @LevitonCareers	837
31. (33)	WSP In The UK We are WSP in the UK – leading professional services consultancy. We provide news & updates about all things WSP. #WeAreWSP	837
32. (30)	Saint-Gobain We design, manufacture and distribute materials and solutions which are key ingredients in the #wellbeing of each of us and the future of all.	836
33. (32)	Johnson Controls Sharing news from Johnson Controls, a global diversified technology and industrial leader serving customers in more than 150 countries.	832
34. (35)	WSP WSP is one of the world’s leading professional services firms. L'une des plus importantes sociétés de services professionnels du monde.	832
35. (34)	Buro Happold We're making the vision viable, helping to create amazing #buildings and #cities around the world.	831
36. (38)	Mott MacDonald Group Opening opportunities with connected thinking | Follow our staff and find out about career opportunities @MottMacLife | For early careers follow @MottMacFuture.	830
37. (37)	Pro Electrician The magazine for the electrical trade. News, tech updates, product reviews, competitions. Available for free at electrical wholesale trade counters nationwide.	829
38. (39)	Lux Magazine Your independent guide to lighting.	829
39. (44)	Nick Grant Passivhaus Consultant excited by Sustainable building design. Technical Director of UK Passivhaus Trust but views are mine or stolen.	828
40. (36)	Facilties Show Facilities Show is the world's largest FM event, supported by IWFM. #FAC2020 #FacMan	828
41. (40)	Passive House Plus Award-winning green building mag. Focus: evidence-based approaches for buildings to mitigate/adapt to climate change. IRL & UK editions	827
42. (41)	FMJ FMJ is the leading resource for the FM sector, providing industry-specific intelligence for the public and private sectors. #facman See jobs at @fmjobfinder	827
43. (45)	BDP BDP is a major international, interdisciplinary practice of architects, designers, engineers and urbanists.	826
44. (47)	Siemens Buildings We’re not just about #buildings. We’re about what buildings make possible. https://t.co/rx3LpdDU9S #CreatingPerfectPlaces #SmartInfrastructure	825
45. (42)	ECA Founded in 1901 - shaping the future: ECA is the UK’s leading trade association for electrotechnical and engineering services organisations	825
46. (43)	Kirsty Hammond Specifier Review – The building product news resource for specifiers. Architecture, design & innovation, news & views from the built environment.	824
47. (48)	HVP Magazine The leading magazine for the heating, ventilating, and plumbing industry. Likes and retweets are not an endorsement. Contact us at hvp@mail.hgluk.net.	823
48. (50)	Wolseley UK A handy source of news and views for the trade. Specialists for plumbing, heating, cooling, drainage, mechanical & parts. Formerly called Plumb Center UK.	821
49. (46)	Energyinstitute The chartered professional membership body bringing global energy expertise together. President @SteveJHolliday, CEO @KinghamEI. Tweets are not endorsements.	820
50. (51)	Lutron Electronics Lutron Electronics is a leading manufacturer of energy-saving light, shade, and temperature controls for new and existing homes and offices.	819
51. (49)	Knauf Insulation UK Knauf Insulation is the UK’s leading insulation manufacturer creating energy efficient systems for buildings.	817
52. (68)	Installer2019	816
53. (53)	Carrier HVACR A world leader in high-tech heating, air-conditioning & refrigeration solutions for residential, commercial, retail, transport & foodservice. Part of @Carrier.	815
54. (52)	Electronic Specifier Electronic Specifier features the latest product & industry news, helping those in the electronics industry make informed choices.	815
55. (58)	EmersonComRes We combine deep expertise and a natural "Can't we do this better?" curiosity for true innovation that enriches our customers' comfort and their lives.	814
56. (56)	WELLcertified At IWBI we believe that buildings should be developed with people's health and wellness at the center of design. #WELLBuildingStandard #weareWELL	814
57. (55)	TheCIPHE The professional and voluntary regulatory body for the plumbing and heating engineering industry.	814
58. (60)	ASHRAEnews Shaping Tomorrow's Built Environment Today	813
59. (59)	VENT-AXIA Vent-Axia continues to lead the way in improving the indoor environment by supplying air management solutions in the UK and around the world.	812
60. (62)	Geberit For up to date news on Geberit products, innovations and real installations from installers.	812
61. (61)	VoltimumUK Voltimum is the Electrical Industry's number one web portal. Here you will find the latest in products, news, technical articles and electrical training.	812
62. (57)	EnviroVent UK’s leading #manufacturer & supplier of energy efficient & sustainable #ventilation products.	812
63. (54)	Danfoss Group We are engineering solutions that allows the world to use resources in smarter ways & driving the #SustainableTransformation of tomorrow.	811
64. (71)	Building Operating Management Leading magazine for #buildingowners, #facilitymanagers, and #cre executives in commercial, institutional and healthcare facilities.	811
65. (66)	BUILD UP The European portal for #energyefficiency in #buildings. #EPBD An initiative of the @EU_Commission. Disclaimer: https://t.co/35sqxDmJvq	811
66. (63)	HPM Magazine Heating & Plumbing Monthly is a must-read magazine in the #heating and #plumbing sector. http://t.co/8a0iQ8eozk	809
67. (65)	Rob Berridge EngTech MCIPHE, Heating, Plumbing, System Design/Consultancy, Est:1984. For all enquires please visit our website. Also director https://t.co/ZFEWQg8YfY @HeatCalculation	809
68. (69)	ARCADIS Design & Consultancy for natural and built assets. #Improvingqualityoflife	809
69. (64)	Ecological Building At the forefront of airtight and windtight building products and natural insulations for over a decade.	809
70. (73)	Legrand Products and systems for electrical installations and information networks. Solutions for residential, commercial & industrial buildings. 1-877-295-3472.	808
71. (67)	Green Building Store Products and technical support for Passivhaus and low energy buildings inc @GBSWindowsDoors & MVHR design. FREE Passivhaus & retrofit technical resources.	808
72. (70)	Siemens India From Turbines to Trains, Power Plants to Automation Controls, Energy-efficient Motors to Building Smart Cities. More: https://t.co/543xQOBga9 Call:1800 209 1800	806
73. (72)	PHEX Since launching in 1994, PHEX is now the UK's No.1 FREE trade show series for plumbing and heating installers and contractors! Follow our instagram: @phexshow	805
74. (81)	Cundall Cundall are multidisciplinary consulting engineers who operate in the UK, Ireland, Australia, Asia, MENA and Europe.	804
75. (74)	Daikin España Perfil corporativo oficial de Daikin España para escuchar, conversar y compartir novedades de la compañía, climatización eficiente y calidad del aire	804
76. (78)	WYG Group At WYG, we design, develop, and deliver interdisciplinary projects from technical solutions to complex challenges	803
77. (77)	UK BIM Alliance Cross industry alliance to drive leadership around implementation of BIM Level 2	803
78. (79)	LIGHTFAIR LIGHTFAIR International (LFI) is the world’s largest annual architectural and commercial lighting trade show and conference. May 3-7, 2020 Las Vegas, NV	802
79. (75)	Electrical Times Welcome to Electrical Times magazine – the voice of electrical contracting. Editor: lisa.peake@purplems.com See also: https://t.co/orc5zZEVNi	802
80. (82)	AECB Association for Environment Conscious Building ◦ We work with our members to inspire, develop and share sustainable building practice ◦ https://t.co/QMkVMdgy00	801
81. (76)	Tomorrow's FM With all the latest news stories and unique features to your desktop, tablet or smartphone, Tomorrow's FM is your online Facilities Management magazine.	801
82. (80)	Stephen Gill Changing lives through engineering #Refrigeration #coolingforall #solarcooling #CircularEconomy #mentor @worldrefday #WREFD19 #STEM #SEforAll #MenAsAllies	801
83. (85)	Carrier Carrier’s industry-leading brands support safe & sustainable buildings, & protect & preserve the global food supply. #BuildingPossible.	800
84. (84)	Graham Merchant Putting the #CustomerF1rst and keeping you up to date with local & industry news and offers from our range of plumbing, heating, bathroom and renewable products	799
85. (89)	ROCKWOOL We are committed to enriching the lives of everyone who comes into contact with our solutions. Tweets from ROCKWOOL UK Marketing Team. https://t.co/gdNShhyqUp	798
86. (94)	Mitsubishi Electric Mitsubishi Electric, Living Environmental Systems. Energy efficient heating, cooling & ventilation solutions. Retweets not an endorsement.	798
87. (86)	Int'l PH Assoc The global network of Passive House professionals and enthusiasts working to promote the Passive House Standard https://t.co/3Xtjz4YbMU	798
88. (88)	Johnson Controls Sharing company and industry news from Johnson Controls' Building Technologies & Solutions. The global leader in building technology and services	798
89. (83)	Stewart Gilmour CA. FD/CFO. Architecture, R2R, Sustainabilty, Passivhaus, BIM, PropTech and HealthTech. MAMIOC. Views my own.	797
90. (90)	David Frise CEO BESA does M&E in built environment Long suffering Spurs fan. Oh & occasional stand up comedy. Views my own	797
91. (87)	SOM We are a collective of architects, designers, engineers, and planners building a better future.	796
92. (91)	Energist UK Your independent specialist for planning, sustainability and building regs. The latest industry news and activity from the team at Energist.	795
93. (95)	Hipmagazine The only magazine for plumbing and heating students and apprentices	795
94. (92)	PHAM News The technical magazine for plumbing, heating and air movement in the UK	794
95. (93)	YORK HVAC The official Twitter account for YORK HVAC. Follow us to stay up to date with the latest news.	793
96. (98)	SLL The SLL welcomes all those who are interested in any aspect of the world of light, lighting, and its applications.	793
97. (96)	NESEA.org Advancing #sustainable #building & #energy practices in the Northeast's built environment by connecting professionals to ideas, opportunities, and each other.	792
98. (101)	UponorUK Uponor offers innovative plumbing and heating system solutions for all building types, available from your local merchant.	791
99. (99)	ACCA The Air Conditioning Contractors of America is the national association representing the nation's best heating, air conditioning, and refrigeration contractors.	789
100. (102)	AEE The Association of Energy Engineers is a nonprofit professional energy engineering society of 18,000 members.	789
101. (104)	Daikin UK Corporate Twitter profile for Daikin UK: follow for corporate news and updates.	787
102. (103)	Uponor North America Uponor offers sustainable systems for homes and commercial buildings. PEX plumbing, radiant heating/cooling, home fire sprinklers, hydronic piping.	787
103. (97)	P&FM Magazine PFM is the leading independent voice of the UK facilities management industry	786
104. (100)	CIBSEJournal Magazine of the Chartered Institution of Building Services Engineers	785
105. (105)	Kingspan Insulation #Kingspan #Insulation. Market leading manufacturer of insulation products & systems including Kingspan GreenGuard, OPTIM-R, Kooltherm, Therma & TEK.	785
106. (107)	Sparks Magazine⚡️ The only magazine for electrical students and apprentices ⚡️ Sign up for SPARKS Apprentice of the Year now! https://t.co/O7AfS6II6U	784
107. (108)	APHC APHC is the leading plumbing and heating trade association. We represent the interests of our members and provide them with technical and commercial support.	783
108. (109)	Pegler Yorkshire UK manufacturer of commercial & residential plumbing & heating products. Our social media team tweet about energy saving products & industry-related news	783
109. (112)	New Buildings Inst. A driving force for better energy performance in buildings...NBI assesses technologies, promotes design approaches, and helps guide policies and programs	782
110. (114)	Taco Comfort Welcome to Taco, a third generation, family owned American manufacturer of the highest quality comfort solutions for residential and commercial applications.	781
111. (117)	Max Fordham LLP We create Beautiful Engineering. We engineer air, light, sound and energy to bring buildings to life. Including tweets from our #acoustics team	780
112. (124)	Philippe Moseley Work at @EU_Commission #EASME on #H2020 #energyefficiency and #renewables in #buildings and urban areas.	780
113. (111)	Chapman Ventilation We do restaurant ventilation. And we do it well. Tweets by Chandni and Danielle.	780
114. (110)	Parity Projects Award winning experts in home #energyefficiency and #retrofit. Services across the UK for #socialhousing #privatelandlords and #localauthorities.	779
115. (113)	Grant UK Leading heating manufacturer supplying award winning condensing oil boilers, renewables, cylinders, heat emitters & controls. Business partner of @BathRugby	778
116. (115)	World Plumbing Day Celebrate the important role plumbing plays in the health and safety of modern society - every year on March 11th. #WorldPlumbingDay	777
117. (131)	Dru Crawley #buildings: #tech, #performance, #netzeroenergy, #simulation, #BIM, #climatechange, #data, PhD, father of #EnergyPlus, Bentley Systems, views own	777
118. (118)	Arcadis N. America News and views from the North American region of the leading Design & Consultancy firm for natural and built assets. #Arcadis	777
119. (116)	Sentinel We protect domestic & commercial #heating & #hotwater systems by providing best practice solutions & products internationally. Account hours: Mon-Fri 9-5.	776
120. (141)	Heat-Engineer.Com Built By Engineers For Engineers, this is the worlds first truly professional heat loss calculation software and much, much more. Massive updates coming soon!!	776
121. (119)	Ramboll UK Ramboll provides multidisciplinary solutions that serve businesses, governments and communities around the world.	776
122. (130)	BESA BESA - The Building Engineering Services Association is the UK's leading trade organisation for building engineering services contractors.	775
123. (120)	Alpha Innovation UK boiler manufacturer offering a complete range of gas boilers for domestic and commercial use.	775
124. (125)	Hoare Lea Engineers of human experiences.	775
125. (122)	Stroma Building sustainability & compliance! Certification, training, software & consultancy services – for a compliant, more energy-efficient built environment.	774
126. (134)	NG Bailey NG Bailey is the UK’s leading independent engineering and services business with a deserved reputation for excellence. Passion | Integrity | Excellence	773
127. (133)	The IES Team Passionate about green building, software simulation tools for architects & engineers and consulting services for design and operation of sustainable buildings	773
128. (121)	FMJ @IFMA's official magazine written by & for FM professionals who develop & maintain productive workplaces to shape the future of the built environment. Est. 1988	773
129. (123)	Setpoint Systems #SystemsIntegrator #BuildingControlSystems #BuildingAutomation #FacilitiesManagement #UL508A #EnergyEfficiency #IoT #CollaborativeSolutionsUnmatchedTraining	773
130. (140)	OpenSensors.io OpenSensors aggregates data from a variety of sensors for the next generation of smart Building Management Systems.	772
131. (126)	CALMAC Use energy more wisely with Thermal Battery cooling featuring Ice Bank #energystorage, for a more sustainable future. Over 1 GW in 60 countries.	772
132. (128)	Thomas Nowak Secretary general of EHPA, convinced supporter of green & energy efficient energy. 100% is possible. HP in the basement: working very well! tweets = own opinion	771
133. (136)	Rinnai UK World's Largest manufacturer of gas appliances, including high efficiency multi purpose water heaters and heating systems	771
134. (139)	Tyco_IS Tyco is now Johnson Controls, the world leader in, security, fire protection, HVAC, building controls and energy storage.	769
135. (145)	H&V News The voice of HVAC for over 60 years! Organiser of H&V Awards. Sign up for free mags at https://t.co/PtHV4lreNH. Join our 8000-strong LinkedIn Group. Tweets from Ed team	769
136. (135)	Kingspan Panels, UK Welcome to Kingspan Insulated Panels, UK. We’re dedicated to maximising construction efficiency and delivering superior lifetime performance and fire protection	769
137. (132)	BoschSecuritySystems Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/J4kYrtVgF4	769
138. (138)	Plumbing&Mechanical Follow PM for all the latest breaking news, products, articles, and events in the plumbing, mechanical and hydronic heating industries.	769
139. (127)	OFTEC OFTEC represents the oil heating industry in the UK and Ireland and manages a competent person registration scheme for off-gas-grid heating technicians.	769
140. (106)	Danfoss Drives Our portfolio of high-quality, application-optimized AC drives maximizes process performance, saves the most energy and minimizes emissions.	768
141. (137)	HPAC Engineering Content provider for those who design, specify, operate, and maintain mechanical and building-automation systems in non-residential buildings.	768
142. (142)	Bosch Security EMEA Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/zlohVrAPpI	766
143. (148)	CORGI Technical We are dedicated experts committed to gas safety. With nearly 50 years experience providing professional services in industry, offering support and expertise	766
144. (149)	RAC Magazine Refrigeration & Air Conditioning. Informing & prompting debate since 1898! We run the Cooling Awards (@coolingawards) F-Gas Question Time etc. Tweets by Ed team	766
145. (147)	Worcester Bosch Follow us for home heating tips, advice and news from our latest range of Which? Award winning boilers. We're here 8am-6pm weekdays, 8am-4pm Sat & 9am-11am Sun	764
146. (144)	Danfoss Cool We keep people, products and the planet cool. Food Retail, Air Conditioning, Industrial & Commercial Refrigeration #HVACR #Turbocor #Cooling #RefrigerantWeek	764
147. (151)	CIPH News Canadian Institute of Plumbing & Heating (CIPH) - the association for plumbing, heating, hydronics, industrial, waterworks and other mechanical products.	762
148. (158)	ACR Journal Essential information for air conditioning and refrigeration professionals. Subscribe FREE online to the magazine or weekly newsletter.	762
149. (153)	Cullinan Studio Cullinan Studio is a cooperative architectural and masterplanning practice engaging with organisations and communities to connect people to nature.	762
150. (143)	Click Scolmore We are committed to providing a comprehensive range of reliable, high quality and competitively priced electrical and lighting products.	761
151. (146)	Susie Diamond I am a partner at Inkling - a Building Physics consultancy keen to help make buildings more comfortable and energy efficient. #BuildingPhysics	760
152. (154)	CE CE is the distributor and wholesaler of leading HVAC/R brands: Carrier, Bryant, Payne, Gree and TopTech. Customer service and HVAC/R expertise is our focus.	759
153. (157)	NVent Nuheat nVent NuHeat is the leading brand for premium electric floor #heating in North America.	758
154. (155)	Testo UK Test and Measurement experts. Manufacture & Calibrate instruments for HVAC, Refrigeration, Catering, Food Processing & Climate Monitoring	756
155. (150)	BBP Collaboration of the UK's leading commercial property owners who are working together to improve the sustainability of existing commercial building stock.	755
156. (162)	Paul Reeve CSR Director at ECA - UK’s leading engineering services body #renewables #safety #EVs #sustainability #energysolutions. RTs may≠agreement. Fellow RSC/IOSH/IEMA	755
157. (178)	SNIPEF SNIPEF is the leading trade association for plumbing and heating businesses in Scotland and Northern Ireland	755
158. (173)	SES Engineering The UK’s leading design-led Mechanical & Electrical (M&E) provider, specialising in the design & installation of building services & infrastructure solutions	755
159. (129)	Dr Penny Sarah Carey	754
160. (159)	Nu-Heat UK Nu-Heat is the largest specialist supplier of warm water underfloor heating systems to the UK domestic market, delivering fully designed underfloor systems.	753
161. (156)	Mark Oliver H+H UK CEO @Colt_Group providing & servicing innovative & sustainable solutions & products for natural ventilation, smoke control, solar shading, louvre & climate	752
162. (161)	SimonMcGuinness If you build a house, make sure its a certified Passive House.	752
163. (164)	RDH Building Science We have a passion for Building Science. Specializing in Building Enclosure Consulting, Construction Project Management, Research, Energy and Forensics.	751
164. (160)	BSRIA BSRIA's engineering, technical and market research experts provide independent and practical help in design, construction and occupancy of the built environment	750
165. (152)	Claire Das Bhaumik Partner at Inkling LLP. Building Physicist. PhD. Chartered Engineer. CIBSE Fellow. KTP Supervisor. CIBSE LCEA. Runner. Guitarist. #BuildingPhysics	750
166. (165)	Kensa Heat Pumps The UK's only manufacturer and number one supplier of ground source heat pumps. For large installations visit Kensa Contracting: @KensaContracts	748
167. (172)	HVROnlineEditor Interesting and quirky HVAC story tweets and retweets and our daily news feed.	748
168. (167)	Andy SNIPEF membership officer. SNIPEF is the leading trade association for plumbing and heating businesses based in Scotland and Northern Ireland	748
169. (163)	Electrical Charity Supporting our people through life's challenges. The Electrical Industries Charity is the national charity for the electrical and energy industries.	748
170. (169)	Remeha Tweets from Remeha, the leading supplier of energy-efficient, low NOx commercial heating solutions.	747
171. (170)	Eric Stromquist I am in to HVAC controls, argentine tango, NLP, and using social media marketing to share information on building automation controls.	747
172. (171)	Smart HVAC Products We introduce new and innovative HVAC products to HVAC professionals. https://t.co/raFWzovYPT	746
173. (166)	Memoori Smart Building Research & Thought Leadership.	744
174. (175)	PHCPPros Your professional plumbing, heating, cooling and piping community. #PHCNews #PlumbingEngineer #TheWholesaler #Especificar	741
175. (176)	Coffman Engineers Civil, structural, mechanical, electrical, fire protection, PMCM, corrosion control, pipeline integrity mgmt, commissioning, & industrial consulting engineers.	740
176. (174)	Sara MacLean Runs a low carbon PR consultancy. Writes about Building Services, Air Pollution, Sustainability and Construction...ex journalist – drinks lots of tea!	739
177. (177)	Trimble MEP Trimble MEP consists of global employees providing software solutions to #electrical, #mechanical & #plumbing professionals. Part of the @TrimbleBuilding group.	739
178. (187)	World Refrigeration Day #WorldRefrigerationDay is a global awareness raising campaign of the role of #airconditioning, #refrigeration, #heatpumps #WREFD19 #DíaMundialdelaRefrigeración	738
179. (180)	LG UK B2B LG Electronics UK Business Solutions. Innovative and cutting edge technology for Commercial Display, Hotel TV, Air Conditioning and Energy Solutions.	738
180. (168)	Toby Cambray M&E and Building Physics Consultant Engineers, specialising in low energy and sustainable design. Tweets on that, rowing and whatever else pops into my head	736
181. (179)	Waterman Waterman is a multidisciplinary consultancy providing sustainable solutions to the property, infrastructure, energy and environmental markets.	734
182. (186)	CoolMentoring.org STEM Mentoring #coolmentoring #STEM #Mentor #beamentor	734
183. (185)	Mark Harris Building Technology Director at Kingspan Panels. Chairman of Engineered Panels in Construction. Interested in climate change & sustainable construction.	733
184. (194)	ACR News The only dedicated monthly UK trade magazine for the air conditioning and refrigeration industry.	732
185. (182)	EHPA The European Heat Pump Association (EHPA) promotes awareness and deployment of #HeatPump technologies in Europe. Join the #HeatPump Community!	731
186. (189)	TLC Engineering An engineering firm that thinks boldly, listens attentively, and creates passionately.	731
187. (190)	PassiveHouseCal Passive House California (PHCA)'s mission is to educate the public about energy efficient & healthy buildings. https://t.co/mTI5kIid9q	730
188. (184)	Airflow Developments Airflow Developments Ltd. is globally recognized as long established ventilation specialists who move air efficiently, quietly and with the utmost reliability.	730
189. (193)	ECD Architects Energy Conscious Design is an award winning UK architectural practice committed to design excellence and sustainability. AECB fans and Passivhaus Trust members.	729
190. (199)	Construction BES 6001 certified steel products for the construction industry including Trimapanel, Trisomet, ComFlor, Celsius, Install and Advance sections	729
191. (201)	ProRite M&E contractor, Design, Install & Maintain all District & Communal Heating Systems, HVAC, Controls, Pipework, Thermal Insulation, Water Treatment.	728
192. (181)	Vital Energi UK’s market leaders for providing district heating, energy generation and energy management solutions. **Account not monitored out of office hours.	728
193. (183)	Timo Ruohomäki Engineer working as a project manager at Forum Virium Helsinki. Specialties: Smart city platforms, lighting controls and building automation.	728
194. (220)	APCbySchneiderElecIN We combine Technology with Innovation to create a sustainable future and an energy efficient world. Join us in this journey of change!	727
195. (203)	Green Gateway Green Gateway is Mitsubishi Electric UK, Living Environmental Systems commitment to the environment. Re-tweets are not endorsements.	727
196. (188)	TroupBywaters+Anders We are high performing, award-winning consulting building services engineers, bringing buildings to life for over 60 years.	727
197. (202)	Plumbing&Heating Mag Plumbing & Heating Magazine specialises in news from the plumbing and heating industry in Ireland – giving a local angle to the news and events in the trade.	726
198. (206)	Buteline Plumbing & Heating System - UK Buteline designs, engineers & manufactures a world acclaimed plumbing system for hot & cold potable water, central heating &UFH. Widely used on offsite installs	726
199. (200)	Yaskawa America, Inc. News and resources from Yaskawa America, Inc. - Drives and Motion Division the world's largest manufacturer of inverter and servo drives, servomotors	726
200. (197)	SALUS Controls SALUS Controls is a lead supplier of energy control solutions focused primarily on the European professional market channel. Think Heating, Think SALUS.	725
201. (192)	IAPMO Founded in 1926 #IAPMO is a world-wide nonprofit association focusing comprehensive capabilities on the technical aspects of #plumbing & #mechanical regulations	725
202. (209)	Altecnic Manufacturing accredited #plumbing & #heating equipment, raising industry best practice, making affordable systems safer, sustainable, easier to fit & maintain.	724
203. (195)	Hurley Palmer Flatt Hurley Palmer Flatt - engineering consultants, delivering design solutions globally. Leaders in mission critical engineering, energy and sustainability.	724
204. (191)	ESTA The UK’s Energy Management industry association for demand-side energy management and efficiency including buildings, processes and transport.	724
205. (214)	Switch Automation Switch Automation creates technology to bring people and planet to the center of building operations.	724
206. (235)	Mercury Engineering We're an Irish based European contractor. We build and manage complex engineering projects that reimagine how people work & live in the built environment.	723
207. (222)	CIBSE West Midlands The Chartered Institution of Building Services Engineers (CIBSE) West Midlands region	723
208. (205)	SELECT Updates Scotland's trade association for the electrical industry | Our main account with regular news updates	722
209. (196)	Airmaster AC We #Design, #Install and #Maintain Mechanical Services in all types of buildings. We specialise in #heating and #cooling solutions and passionate about #energy!	722
210. (213)	Retrotec We are the world's leading blower door manufacturer, promoting green building through air tightness and enclosure integrity testing equip. & training.	721
211. (204)	Hilson Moran Leading multidisciplinary engineering consultancy for the built environment. Creating Environments for Life.	720
212. (217)	CABA CABA is a trade association focused on smart homes and intelligent buildings	719
213. (207)	Zehnder UK Indoor Climate Solutions: Heating, Cooling & Ventilation.	719
214. (218)	Alex Smith Tweeting mostly about the built environment – editor of CIBSE Journal	719
215. (208)	Heating Controls Heating Controls & Devices (HCD) we specialise in all types of domestic & industrial Oil & Gas repairs. We’re GAS SAFE Accredited on Domestic & Commercial Gas .	718
216. (215)	Glumac Engineers Glumac, a Tetra Tech Company, is a global MEP engineering and commissioning firm focused on delivering Green Buildings That Work.	718
217. (211)	Heatrae Sadia The UK's largest manufacturer of electric water heating products, we have the most comprehensive product range and a commitment to product innovation & quality.	718
218. (225)	Emerson Technicians & Skilled Trades Emerson Commercial and Residential Solutions - Industry channel designed to curate content for our #HVACR and #SkilledTrades audiences	718
219. (221)	Will R Head of Sustainability @clarion_group Expert in building energy & sustainability, but I never stop learning. My tweets are my own.	717
220. (198)	Reznor The UK's leading supplier of gas-fired warm air heating and ventilation systems to the industrial and commercial building markets as part of Nortek Global HVAC	717
221. (210)	BuildingIQ BuildingIQ's 5i Platform of technology-enabled services is comprised of five components: data capture and analysis, modeling, M&V, control, and human expertise.	717
222. (212)	AndrewsWaterHeaters Andrews Water Heaters is the UK market leader for commercial hot water solutions. Andrews, built to perform.	717
223. (219)	HVAC-Outlet, LLC http://t.co/5wG14dH98K Bringing professional grade thermostats and air purification to DIYers, HVAC Techs, and Contractors alike.	717
224. (234)	PHCC-National Assn. Founded in 1883, the Plumbing-Heating-Cooling Contractors–National Association is America’s premiere trade group for the plumbing-heating-cooling professional.	716
225. (230)	Ian Chapman Building Services Director @MottMacDonald and former Director of National BIM Library @theNBS. Committed to making BIM a reality. Views are my own.	715
226. (224)	Comfort Supply, Inc. Pittsburgh's #HVAC Systems Specialists. 1,200+ #VRF jobs including over 55,000 TONS supplied to date! Ask about getting #CSIpghCERTIFIED.	714
227. (228)	Bouygues Energies & Services UK Bouygues Energies & Services is a client-focused facilities management, energy performance, and smart city partner.	713
228. (241)	Trend Controls Trend is a major international supplier of Building Energy Management Systems (BEMS) with a worldwide distribution and support network covering 50+ countries.	713
229. (236)	Tridium Inc. The global leader in open platforms, application software frameworks, automation infrastructure, energy management & device-to-enterprise integration.	712
230. (216)	NIBE Energy Systems NIBE is one of Europe's leading manufacturers of renewable energy products, offering solutions that reflect today's demand for sustainable construction.	712
231. (233)	Jackson Systems, LLC Award-winning, innovative HVAC controls, direct-to-contractor. Like us on Facebook, too! https://t.co/WK4xHRvJ0C	711
232. (229)	Mariana Pickering CEO + Co-Founder @EmuBldgScience - experts in #buildingscience, advanced construction technology, and #passivehouse design. Remember to #RunWildBuildPassive !	711
233. (232)	Bosch Security AP Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/bFSHPUZSF6	711
234. (261)	Sara Kassam Head of Sustainability Development at CIBSE (views my own). Fascinated by #buildings and beyond..... mother of two girls #diversity #inclusion #WomeninSTEM	710
235. (226)	IPHM.info The International Passive House Magazine (iPHM) is providing you always up-to-date information and collecting all the relevant articles 4 you.	710
236. (244)	Carlo Gavazzi Inc CARLO GAVAZZI is your one stop source for a variety of automation components: Sensors, Switches and Controls - for Industrial and Building Automation.	710
237. (237)	Lindab UK At Lindab, we simplify construction. Because it is human nature to build, we make it easier to build sustainably.	709
238. (254)	Goodway Technologies Goodway Technologies official twitter account. Goodway Technologies Corporation is your source for quality HVAC and facility maintenance equipment.	709
239. (243)	Building Services Building Services helps you make better decisions about who to work with and what products to use for your projects. Newsletters: http://t.co/TdhNq7G21c	708
240. (240)	Luxaire HVAC The official Twitter account for Luxaire HVAC. Follow us to stay up to date with the latest news.	708
241. (252)	Colt International Colt International deelt kennis en nieuws over duurzaam bouwen, architectuur, klimaattechniek, daglichttechniek en brandveiligheid. Bezoek ons blog op:	708
242. (227)	Elementa Consulting Elementa is an award winning building services, low carbon and sustainability consultancy specialising in low energy design.	708
243. (223)	Smartcool Systems Inc. Smartcool Systems Inc. (TSXV: SSC) provides cutting edge energy efficient & energy cost reduction solutions... For more information: mike.kordysz@smartcool.net	707
244. (231)	Arthur McKay UK Building Support Services company delivering Mechanical & Electrical, Fire Protection, Networks and Facilities Management services with YOU at the centre.	707
245. (256)	Digital Energy Solutions Energy Solutions for all Businesses - Complete #solutions for #Metering #Monitoring #CRC #ESOS #ISO50001 #compliance #energy #energyefficiency #savings	707
246. (247)	Calgary Hydronics Poking boilers with sharp objects..	706
247. (242)	UrbanEnergy Research Heriot-Watt Urban Energy Research Group. Building energy, energy systems, and policy. Dr David Jenkins #cedri #cesi #ReflexOrkney D.P.Jenkins@hw.ac.uk	706
248. (239)	H2oBuilding Services We are The Water Audit Experts the UK leading Water Cost Reduction Experts Reducing business water costs-Water Audits-Water Leak Detection- Nationwide	706
249. (265)	Mitton Group Mitton is the name behind 1 of the UK’s leading building services groups providing professional & comprehensive mechanical building service solutions nationwide	706
250. (274)	Couchperrywilkes Environmental Building Services Consultancy | Delivering innovative and sustainable buildings since 1978.	705
251. (263)	Casaplex Award-winning provider of Home Automation, Home Theaters, Smart Homes, Smart Buildings and IT Services in DC, MD, VA and FL	705
252. (246)	Boiler-M8 The official account for Boiler-M8. Manufacturer of high quality magnetic heating system filters	705
253. (249)	KMC Controls KMC Controls provides IoT and Automation solutions to increase operational efficiency, optimize energy usage, and make spaces more comfort and safe.	703
254. (245)	Danfoss Cool US Contractor, wholesaler and end user support for the #HVAC and #refrigeration industries. Find tips, tricks, and tools to be sure you are equipped for success.	702
255. (268)	AM Joynes Electrical Manufacture and Design of AC/DC Switchgear, Bespoke Control Panels, HVAC Panels, Copper Junction Boxes, Earth Bars and Busbars, Electrical Installation and Test	702
256. (251)	BSD BSD is an independent firm of mechanical and electrical consulting engineers that make buildings comfortable, functional and efficient.	701
257. (284)	EVORA We make #buildings productive, profitable, and resilient to change. Our market leading #sustainability #data #software, @sierasoftware, enables this.	701
258. (277)	Zerum We are a Development and Design Consultancy: • Planning • Building Services Design • Project & Development Management	701
259. (255)	Ref_Industry #Refrigeration daily news. Send us your HVACR news info@refindustry.com.	701
260. (238)	Atelier Ten As environmental design consultants and building services engineers we are committed to high-performance and sustainable design within the built environment.	701
261. (248)	LEDA LTD Multi-disciplinary co-op of architects and building services engineers, creating great sustainable buildings that respect the environment & are a joy to use.	701
262. (262)	EcoDesignConsultants #Architects specialising in beautiful, sustainability, low carbon housing, European Certified #Passivhaus Designers.	700
263. (264)	Strong Energy Ltd We have vast experience of low energy buildings & renewable energy, biofuels and distribution channels for biomass,heat pumps & high performance wood chip.	700
264. (532)	Aspen Pumps Group Making the engineer's life easier. Providing everything HVAC/R professionals need under one roof.	700
265. (266)	One Eighty Light We help create beautiful spaces with light. Not just functional light, but light that invigorates, lifts the spirit, and touches peoples lives every day.	700
266. (273)	Bosch Security Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/zlohVrAPpI	699
267. (272)	HeatandPlumb.com https://t.co/kAYa3qujC7 supplies over 50,000 heating, plumbing & bathroom products to the trade & public, at competitive online prices. Call 0203 113 2122	699
268. (280)	Graeme Fox retweets not an endorsement; opinions are entirely personal and nothing to do with my work; when you see people endorsing Fox for PM it probably isn't me	698
269. (257)	CPW East Mids Environmental Building Services Consultancy. Making buildings feel good. We are the East Midlands offices of CouchPerryWilkes.	698
270. (259)	Monodraught®