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

4:00am, 20th Nov 2019
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Rank	Player	Index
1. (1)	Schneider Electric With EcoStruxure™, we provide energy and automation digital solutions for efficiency and sustainability.	983
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	972
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.	927
5. (5)	AECOM We are the world’s premier infrastructure firm, taking on the most complex challenges and pioneering solutions that push the limits of what’s possible.	915
6. (8)	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	908
7. (6)	SiemensUSA Unlocking the potential of digital transformation to positively impact society. #SiemensUSA	904
8. (7)	Janet T Beckett Chartered Engineer, HVAC & Low Carbon building designer, I work in construction. Democratic Socialist.	902
9. (9)	PHPI Magazine The UK’s biggest heating & plumbing mag. Likes/RTs ≠ endorsements #InstallOfFame https://t.co/HbeyOxW1yK https://t.co/SDfKMtFdlY	898
10. (11)	The IMechE Team We're the Institution of Mechanical Engineers (IMechE), and we're raising the profile of mechanical engineering.	895
11. (10)	IWFM The Institute of Workplace and Facilities Management (IWFM) is the professional body for workplace and facilities practitioners.	893
12. (12)	CIBSE Chartered Institution of Building Services Engineers: dedicated to improving building performance through engineering excellence.	888
13. (13)	Mitsubishi Electric Experience total home comfort while conserving energy and filtering allergens — all at the touch of a button. #MakeYourselfComfortable	885
14. (14)	Mitie The UK’s leading Facilities Management business delivering the exceptional, every day: #ConnectedWorkspace - Social media team here 9am - 5:30pm, Mon-Fri.	883
15. (15)	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. 🙂	882
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	877
17. (17)	Installer Magazine Installer is essential reading for heating, plumbing and renewable professionals.	876
18. (18)	Honeywell At #Honeywell, we're transforming the way the world works. #futureshaper	867
19. (21)	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.	862
20. (19)	IFMA Facility managers improve business and our lives. We help them make it possible.	861
21. (20)	Passivhaus Trust Leading the way in the UK for adoption of the #Passivhaus standard. UK affiliate of @the_iPHA.	861
22. (22)	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	852
23. (24)	Arcadis UK Arcadis is the leading global natural and built asset design and consultancy firm. LinkedIn: Arcadis United Kingdom	850
24. (23)	Facilitate Magazine Facilitate is the magazine of @IWFM_UK – the Institute of Workplace and Facilities Management. Winner, Best Magazine at the 2019 Association Excellence Awards.	849
25. (28)	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.	848
26. (27)	Simon Owen Built environment recruiter, @CIBSEYrksAwards organiser, @CIBSE Yorkshire region committee member and #cycling obsessive.	846
27. (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.	844
28. (29)	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	843
29. (25)	Nathan James Van Gambling BA Hon. Heating Plumbing Energy Lecturer @lowcarbonhomes workshop @betateachpod podcast host. Member of @A_L_T #solarheat #andragogy #BetaPR #gamechangingPR	842
30. (31)	Leviton Leading manufacturer of electrical wiring devices, lighting controls, network solutions, electric vehicle supply equipment & automation. Join us @LevitonCareers	839
31. (32)	Official NICEIC News, views and information from NICEIC, the UK's leading registration body for the electrical contracting industry. Always choose an NICEIC contractor.	838
32. (30)	WSP In The UK We are WSP in the UK – leading professional services consultancy. We provide news & updates about all things WSP. #WeAreWSP	838
33. (33)	Johnson Controls 105,000 experts globally, dedicated to protecting the environment in a 150 countries & 130 years of innovation, we are the power behind our customers’ mission.	836
34. (61)	EnviroVent UK’s leading #manufacturer & supplier of energy efficient & sustainable #ventilation products.	834
35. (34)	Buro Happold We're making the vision viable, helping to create amazing #buildings and #cities around the world.	834
36. (36)	WSP WSP is one of the world’s leading professional services firms. L'une des plus importantes sociétés de services professionnels du monde.	832
37. (37)	Mott MacDonald Group Opening opportunities with connected thinking | Follow our staff and find out about career opportunities @MottMacLife | For early careers follow @MottMacFuture.	831
38. (43)	Lux Magazine Your independent guide to lighting.	829
39. (40)	Passive House Plus Award-winning green building mag. Focus: evidence-based approaches for buildings to mitigate/adapt to climate change. IRL & UK editions	828
40. (39)	Pro Electrician The magazine for the electrical trade. News, tech updates, product reviews, competitions. Available for free at electrical wholesale trade counters nationwide.	828
41. (41)	Facilties Show Facilities Show is the world's largest FM event, supported by IWFM. #FAC2020 #FacMan	827
42. (50)	Rob Berridge EngTech MCIPHE, Heating Design/Consultancy, Est:1984. For all enquires please visit our website. My views are my own, well researched but always up for debate. #BeaPro	826
43. (38)	Nick Grant Passivhaus Consultant excited by Sustainable building design. Technical Director of UK Passivhaus Trust but views are mine or stolen.	826
44. (42)	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	826
45. (44)	BDP BDP is a major international, interdisciplinary practice of architects, designers, engineers and urbanists.	825
46. (47)	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.	825
47. (46)	Kirsty Hammond Specifier Review – The building product news resource for specifiers. Architecture, design & innovation, news & views from the built environment.	824
48. (45)	ECA Founded in 1901 - shaping the future: ECA is the UK’s leading trade association for electrotechnical and engineering services organisations	824
49. (35)	Energyinstitute The chartered professional membership body bringing global energy expertise together. President @SteveJHolliday, CEO @KinghamEI. Tweets are not endorsements.	823
50. (57)	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.	823
51. (74)	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	820
52. (48)	Lutron Electronics Lutron Electronics is a leading manufacturer of energy-saving light, shade, and temperature controls for new and existing homes and offices.	820
53. (49)	Knauf Insulation UK Knauf Insulation is the UK’s leading insulation manufacturer creating energy efficient systems for buildings.	819
54. (58)	WELLcertified At IWBI we believe that buildings should be developed with people's health and wellness at the center of design. #WELLBuildingStandard #weareWELL	818
55. (98)	Hipmagazine The only magazine for plumbing and heating students and apprentices	817
56. (52)	Danfoss Group We are engineering solutions that allows the world to use resources in smarter ways & driving the #SustainableTransformation of tomorrow.	816
57. (54)	TheCIPHE The professional and voluntary regulatory body for the plumbing and heating engineering industry.	816
58. (51)	Electronic Specifier Electronic Specifier features the latest product & industry news, helping those in the electronics industry make informed choices.	815
59. (55)	EmersonComRes Comfortable, controllable indoor environments. Fresh, safe food throughout the cold chain. Energy-efficient technology to build sustainable infrastructures.	815
60. (60)	ASHRAEnews Shaping Tomorrow's Built Environment Today	815
61. (65)	BUILD UP The European portal for #energyefficiency in #buildings. #EPBD An initiative of the @EU_Commission. Disclaimer: https://t.co/35sqxDmJvq	814
62. (59)	Geberit For up to date news on Geberit products, innovations and real installations from installers.	814
63. (67)	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.	813
64. (56)	Carrier HVACR A world leader in high-tech heating, air-conditioning & refrigeration solutions for residential, commercial, retail, transport & foodservice. Part of @Carrier.	812
65. (69)	HPM Magazine Heating & Plumbing Monthly is a must-read magazine in the #heating and #plumbing sector. http://t.co/8a0iQ8eozk	812
66. (53)	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
67. (62)	Ecological Building At the forefront of airtight and windtight building products and natural insulations for over a decade.	811
68. (63)	Siemens Buildings We’re not just about #buildings. We’re about what buildings make possible. https://t.co/rx3LpdDU9S #CreatingPerfectPlaces #SmartInfrastructure	811
69. (64)	Green Building Store Products and technical support for Passivhaus and low energy buildings inc @GBSWindowsDoors & MVHR design. FREE Passivhaus & retrofit technical resources.	811
70. (73)	Cundall Cundall are multidisciplinary consulting engineers who operate in the UK, Ireland, Australia, Asia, MENA and Europe.	811
71. (68)	Building Operating Management Leading magazine for #buildingowners, #facilitymanagers, and #cre executives in commercial, institutional and healthcare facilities.	811
72. (70)	Installer2019	809
73. (66)	ARCADIS Design & Consultancy for natural and built assets. #Improvingqualityoflife	808
74. (75)	Legrand Products and systems for electrical installations and information networks. Solutions for residential, commercial & industrial buildings. 1-877-295-3472.	806
75. (77)	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
76. (71)	AECB Association for Environment Conscious Building ◦ We work with our members to inspire, develop and share sustainable building practice ◦ https://t.co/QMkVMdgy00	806
77. (76)	UK BIM Alliance Here to help Industry support/take the first fundamental step in the journey to digital transformation ensuring BIM becomes business as usual.	805
78. (72)	WYG Group At WYG, we design, develop, and deliver interdisciplinary projects from technical solutions to complex challenges	805
79. (79)	Stephen Gill Changing lives through engineering #Refrigeration #coolingforall #solarcooling #CircularEconomy #mentor @worldrefday #WREFD19 #STEM #SEforAll #MenAsAllies	804
80. (78)	Electrical Times Welcome to Electrical Times magazine – the voice of electrical contracting. Editor: lisa.peake@purplems.com See also: https://t.co/orc5zZEVNi	803
81. (109)	PHAM News The technical magazine for plumbing, heating and air movement in the UK	802
82. (81)	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
83. (80)	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	801
84. (82)	Int'l PH Assoc The global network of Passive House professionals and enthusiasts working to promote the Passive House Standard https://t.co/3Xtjz4YbMU	800
85. (85)	David Frise CEO BESA does M&E in built environment Long suffering Spurs fan. Oh & occasional stand up comedy. Views my own	799
86. (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
87. (86)	Johnson Controls Sharing company and industry news from Johnson Controls' Building Technologies & Solutions. The global leader in building technology and services	799
88. (83)	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
89. (88)	SOM We are a collective of architects, designers, engineers, and planners building a better future.	798
90. (91)	YORK HVAC The official Twitter account for YORK HVAC. Follow us to stay up to date with the latest news.	796
91. (99)	ACCA The Air Conditioning Contractors of America is the national association representing the nation's best heating, air conditioning, and refrigeration contractors.	796
92. (90)	Mitsubishi Electric Mitsubishi Electric, Living Environment Systems. Energy efficient heating, cooling & ventilation solutions. Retweets not an endorsement.	795
93. (95)	Energist UK Your independent specialist for planning, sustainability and building regs. The latest industry news and activity from the team at Energist.	795
94. (92)	UponorUK Uponor offers innovative plumbing and heating system solutions for all building types, available from your local merchant.	794
95. (94)	SLL The SLL welcomes all those who are interested in any aspect of the world of light, lighting, and its applications.	794
96. (93)	NESEA.org Advancing #sustainable #building & #energy practices in the Northeast's built environment by connecting professionals to ideas, opportunities, and each other.	793
97. (87)	Daikin España Perfil corporativo oficial de Daikin España para escuchar, conversar y compartir novedades de la compañía, climatización eficiente y calidad del aire	792
98. (89)	P&FM Magazine PFM is the leading independent voice of the UK facilities management industry	792
99. (97)	AEE The Association of Energy Engineers is a nonprofit professional energy engineering society of 18,000 members.	790
100. (100)	Uponor North America Uponor offers sustainable systems for homes and commercial buildings. PEX plumbing, radiant heating/cooling, home fire sprinklers, hydronic piping.	790
101. (102)	CIBSEJournal Magazine of the Chartered Institution of Building Services Engineers	790
102. (96)	Stewart Gilmour CA. FD/CFO. Architecture, R2R, Sustainabilty, Passivhaus, BIM, PropTech and HealthTech. MAMIOC. Views my own.	789
103. (103)	Kingspan Insulation #Kingspan #Insulation. Market leading manufacturer of insulation products & systems including Kingspan GreenGuard, OPTIM-R, Kooltherm, Therma & TEK.	788
104. (105)	Daikin UK Corporate Twitter profile for Daikin UK: follow for corporate news and updates.	788
105. (104)	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.	787
106. (114)	BESA BESA - The Building Engineering Services Association is the UK's leading trade organisation for building engineering services contractors.	785
107. (112)	Sparks Magazine⚡️ The only magazine for electrical students and apprentices ⚡️ Sign up for SPARKS Apprentice of the Year now! https://t.co/O7AfS6II6U	785
108. (115)	New Buildings Inst. A driving force for better energy performance in buildings...NBI assesses technologies, promotes design approaches, and helps guide policies and programs	785
109. (107)	Parity Projects Award winning experts in home #energyefficiency and #retrofit. Services across the UK for #socialhousing #privatelandlords and #localauthorities.	783
110. (108)	Carrier Carrier’s industry-leading brands support safe & sustainable buildings, & protect & preserve the global food supply. #BuildingPossible.	783
111. (113)	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!!	783
112. (116)	Arcadis N. America News and views from the North American region of the leading Design & Consultancy firm for natural and built assets. #Arcadis	783
113. (122)	Grant UK Leading heating manufacturer supplying award winning condensing oil boilers, renewables, cylinders, heat emitters & controls. Business partner of @BathRugby	782
114. (111)	Pegler Yorkshire UK manufacturer of commercial & residential plumbing & heating products. Our social media team tweet about energy saving products & industry-related news	781
115. (110)	Ramboll UK Ramboll provides multidisciplinary solutions that serve businesses, governments and communities around the world.	781
116. (101)	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
117. (119)	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	779
118. (126)	Sentinel We protect domestic & commercial #heating & #hotwater systems by providing best practice solutions & products internationally. Account hours: Mon-Fri 9-5.	779
119. (124)	World Plumbing Day Celebrate the important role plumbing plays in the health and safety of modern society - every year on March 11th. #WorldPlumbingDay	779
120. (117)	Taco Comfort Welcome to Taco, a third generation, family owned American manufacturer of the highest quality comfort solutions for residential and commercial applications.	778
121. (123)	Dru Crawley #buildings: #tech, #performance, #netzeroenergy, #simulation, #BIM, #climatechange, #data, PhD, father of #EnergyPlus, Bentley Systems, views own	778
122. (121)	Philippe Moseley Work at @EU_Commission #EASME on #H2020 #energyefficiency and #renewables in #buildings and urban areas.	778
123. (120)	Hoare Lea Engineers of human experiences.	778
124. (106)	Chapman Ventilation We do restaurant ventilation. And we do it well.	778
125. (125)	Stroma Building sustainability & compliance! Certification, training, software & consultancy services – for a compliant, more energy-efficient built environment.	777
126. (128)	Rinnai UK World's Largest manufacturer of gas appliances, including high efficiency multi purpose water heaters and heating systems	777
127. (130)	The IES Team Passionate about green building, software simulation tools for architects & engineers and consulting services for design and operation of sustainable buildings	776
128. (129)	Alpha Innovation UK boiler manufacturer offering a complete range of gas boilers for domestic and commercial use.	776
129. (131)	CALMAC Use energy more wisely with Thermal Battery cooling featuring Ice Bank #energystorage, for a more sustainable future. Over 1 GW in 60 countries.	775
130. (132)	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	774
131. (133)	Setpoint Systems #SystemsIntegrator #BuildingControlSystems #BuildingAutomation #FacilitiesManagement #UL508A #EnergyEfficiency #IoT #CollaborativeSolutionsUnmatchedTraining	773
132. (127)	NG Bailey NG Bailey is the UK’s leading independent engineering and services business with a deserved reputation for excellence. Passion | Integrity | Excellence	773
133. (145)	OpenSensors.io OpenSensors aggregates data from a variety of sensors for the next generation of smart Building Management Systems.	772
134. (137)	Plumbing&Mechanical Follow PM for all the latest breaking news, products, articles, and events in the plumbing, mechanical and hydronic heating industries.	771
135. (139)	HPAC Engineering Content provider for those who design, specify, operate, and maintain mechanical and building-automation systems in non-residential buildings.	771
136. (150)	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	771
137. (143)	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.	771
138. (148)	Danfoss Drives Our portfolio of high-quality, application-optimized AC drives maximizes process performance, saves the most energy and minimizes emissions.	771
139. (138)	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	770
140. (135)	BoschSecuritySystems Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/J4kYrtVgF4	769
141. (146)	Susie Diamond I am a partner at Inkling - a Building Physics consultancy keen to help make buildings more comfortable and energy efficient. #BuildingPhysics	769
142. (147)	Danfoss Cool We keep people, products and the planet cool. Food Retail, Air Conditioning, Industrial & Commercial Refrigeration #HVACR #Turbocor #Cooling #CoolApps	769
143. (140)	Kingspan Panels, UK Welcome to Kingspan Insulated Panels, UK. We’re dedicated to maximising construction efficiency and delivering superior lifetime performance and fire protection	768
144. (141)	Tyco_IS Tyco is now Johnson Controls, the world leader in, security, fire protection, HVAC, building controls and energy storage.	768
145. (134)	Bromak M&E Recruitment @BromakRecruit's M&E Division, Experts in Mechanical & Electrical #Recruitment	768
146. (158)	Worcester Bosch Head to @WorcsBoschCare for homeowner support	767
147. (162)	Click Scolmore We are committed to providing a comprehensive range of reliable, high quality and competitively priced electrical and lighting products.	767
148. (142)	Bosch Security EMEA Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/TNjjIZqIzQ	766
149. (144)	CORGI Technical We are dedicated experts committed to gas safety. With nearly 50 years experience providing professional services in industry, offering support and expertise	765
150. (152)	CIPH News Canadian Institute of Plumbing & Heating (CIPH) - the association for plumbing, heating, hydronics, industrial, waterworks and other mechanical products.	764
151. (154)	ACR Journal Essential information for air conditioning and refrigeration professionals. Subscribe FREE online to the magazine or weekly newsletter.	764
152. (151)	Cullinan Studio Cullinan Studio is a cooperative architectural and masterplanning practice engaging with organisations and communities to connect people to nature.	763
153. (167)	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	762
154. (172)	Claire Das Bhaumik Partner at Inkling LLP. Building Physicist @CIBSE Fellow and LCEA. KTP Supervisor. Runner. Guitarist. #BuildingPhysics	761
155. (118)	BBP Collaboration of the UK's leading commercial property owners who are working together to improve the sustainability of existing commercial building stock.	761
156. (153)	NVent Nuheat nVent NuHeat is the leading brand for premium electric floor #heating in North America.	760
157. (157)	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.	760
158. (136)	Dr Penny Sarah Carey	760
159. (159)	SES Engineering The UK’s leading design-led Mechanical & Electrical (M&E) provider, specialising in the design & installation of building services & infrastructure solutions	758
160. (163)	Testo UK Test and Measurement experts. Manufacture & Calibrate instruments for HVAC, Refrigeration, Catering, Food Processing & Climate Monitoring	756
161. (165)	BSRIA BSRIA's engineering, technical and market research experts provide independent and practical help in design, construction and occupancy of the built environment	755
162. (168)	HVROnlineEditor Interesting and quirky HVAC story tweets and retweets and our daily news feed.	755
163. (161)	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.	755
164. (155)	Mark Oliver H+H UK CEO @Colt_Group providing & servicing innovative & sustainable solutions & products for natural ventilation, smoke control, solar shading, louvre & climate	755
165. (169)	Kensa Heat Pumps The UK's only manufacturer and number one supplier of ground source heat pumps. For large installations visit Kensa Contracting: @KensaContracts	754
166. (171)	Memoori Smart Building Research & Thought Leadership.	754
167. (156)	SimonMcGuinness If you build a house, make sure its a certified Passive House.	754
168. (160)	Paul Reeve CSR Director at ECA - the UK’s leading engineering services body. Advocating clean energy, sustainability, CSR, safety. RTs may≠agreement. Fellow RSC/IOSH/IEMA	753
169. (164)	Electrical Charity Supporting our people through life's challenges. The Electrical Industries Charity is the national charity for the electrical and energy industries.	751
170. (166)	RDH Building Science We have a passion for Building Science. Specializing in Building Enclosure Consulting, Construction Project Management, Research, Energy and Forensics.	751
171. (170)	Remeha Tweets from Remeha, the leading supplier of energy-efficient, low NOx commercial heating solutions.	749
172. (149)	Andy SNIPEF membership officer. SNIPEF is the leading trade association for plumbing and heating businesses based in Scotland and Northern Ireland	748
173. (174)	Eric Stromquist I am in to HVAC controls, argentine tango, NLP, and using social media marketing to share information on building automation controls.	747
174. (175)	Timo Ruohomäki Director, IoT and Data (starting 1.12.) at Forum Virium, the innovation company of City of Helsinki. #smartcity #urbanplatform #kafka #geospatial	746
175. (176)	Smart HVAC Products We introduce new and innovative HVAC products to HVAC professionals. https://t.co/raFWzovYPT	745
176. (182)	Sara MacLean Runs a low carbon PR consultancy. Writes about Building Services, Air Pollution, Sustainability and Construction...ex journalist – drinks lots of tea!	745
177. (178)	SNIPEF SNIPEF is the leading trade association for plumbing and heating businesses in Scotland and Northern Ireland	744
178. (173)	PHCPPros Your professional plumbing, heating, cooling and piping community. #PHCNews #PlumbingEngineer #TheWholesaler #Especificar	744
179. (177)	Waterman Waterman is a multidisciplinary consultancy providing sustainable solutions to the property, infrastructure, energy and environmental markets.	742
180. (180)	EHPA The European Heat Pump Association (EHPA) promotes awareness and deployment of #HeatPump technologies in Europe. Join the #HeatPump Community!	741
181. (183)	Trimble MEP Trimble MEP consists of global employees providing software solutions to #electrical, #mechanical & #plumbing professionals. Part of the @TrimbleBuilding group.	740
182. (179)	Coffman Engineers Civil, structural, mechanical, electrical, fire protection, PMCM, corrosion control, pipeline integrity mgmt, commissioning, & industrial consulting engineers.	739
183. (196)	TroupBywaters+Anders We are high performing, award-winning consulting building services engineers, bringing buildings to life for over 60 years.	737
184. (191)	Mark Harris Building Technology Director at Kingspan Panels. Chairman of Engineered Panels in Construction. Interested in climate change & sustainable construction.	735
185. (186)	ProRite M&E contractor, Design, Install & Maintain all District & Communal Heating Systems, HVAC, Controls, Pipework, Thermal Insulation, Water Treatment.	735
186. (197)	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	735
187. (188)	Airflow Developments Airflow Developments Ltd. is globally recognized as long established ventilation specialists who move air efficiently, quietly and with the utmost reliability.	733
188. (181)	IAPMO Founded in 1926 #IAPMO is a world-wide nonprofit association focusing comprehensive capabilities on the technical aspects of #plumbing & #mechanical regulations	733
189. (190)	APCbySchneiderElecIN We combine Technology with Innovation to create a sustainable future and an energy efficient world. Join us in this journey of change!	733
190. (189)	SELECT Updates Scotland's trade association for the electrical industry | Our main account with regular news updates	733
191. (195)	ECD Architects Energy Conscious Design is an award winning UK architectural practice committed to design excellence and sustainability. AECB fans and Passivhaus Trust members.	732
192. (193)	ACR News The only dedicated monthly UK trade magazine for the air conditioning and refrigeration industry.	732
193. (204)	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.	731
194. (187)	TLC Engineering An engineering firm that thinks boldly, listens attentively, and creates passionately.	730
195. (185)	LG UK B2B LG Electronics UK Business Solutions. Innovative and cutting edge technology for Commercial Display, Hotel TV, Air Conditioning and Energy Solutions.	730
196. (202)	Green Gateway Green Gateway is Mitsubishi Electric UK, Living Environmental Systems commitment to the environment. Re-tweets are not endorsements.	729
197. (194)	CoolMentoring.org STEM Mentoring #coolmentoring #STEM #Mentor #beamentor	729
198. (200)	ESTA The UK’s Energy Management industry association for demand-side energy management and efficiency including buildings, processes and transport.	729
199. (205)	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	729
200. (203)	Altecnic Manufacturing accredited #plumbing & #heating equipment, raising industry best practice, making affordable systems safer, sustainable, easier to fit & maintain.	728
201. (192)	Vital Energi UK’s market leaders for providing district heating, energy generation and energy management solutions. **Account not monitored out of office hours.	728
202. (242)	Smartcool Systems Inc. Smartcool Systems Inc. (TSXV: SSC) provides cutting edge energy efficient & energy cost reduction solutions... For more information: mike.kordysz@smartcool.net	727
203. (201)	Construction Supplying responsibly sourced steel products and technical expertise to the construction industry including cladding systems, composite floor deck and tubes.	727
204. (199)	PassiveHouseCal Passive House California (PHCA)'s mission is to educate the public about energy efficient & healthy buildings. https://t.co/mTI5kIid9q	727
205. (206)	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 .	726
206. (231)	CIBSE West Midlands The Chartered Institution of Building Services Engineers (CIBSE) West Midlands region	726
207. (211)	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!	725
208. (214)	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.	725
209. (208)	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	724
210. (222)	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.	724
211. (209)	SALUS Controls SALUS Controls is a lead supplier of energy control solutions focused primarily on the European professional market channel. Think Heating, Think SALUS.	724
212. (207)	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.	723
213. (216)	Zehnder UK Indoor Climate Solutions: Heating, Cooling & Ventilation.	723
214. (215)	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.	723
215. (225)	Switch Automation Switch Automation creates technology to bring people and planet to the center of building operations.	723
216. (198)	Hurley Palmer Flatt HDR | Hurley Palmer Flatt - engineering consultants, delivering design solutions globally. Leaders in mission critical engineering, energy and sustainability.	723
217. (184)	World Refrigeration Day #WorldRefrigerationDay is a global awareness raising campaign of the role of #airconditioning, #refrigeration, #heatpumps #WREFD19 #DíaMundialdelaRefrigeración	723
218. (229)	Will R Head of Sustainability @clarion_group Expert in building energy & sustainability, but I never stop learning. My tweets are my own.	722
219. (220)	Retrotec We are the world's leading blower door manufacturer, promoting green building through air tightness and enclosure integrity testing equip. & training.	722
220. (210)	Mitton Group Mitton is the name behind 1 of the UK’s leading building services groups providing professional & comprehensive mechanical building service solutions nationwide	718
221. (212)	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.	718
222. (227)	Glumac Engineers Glumac, a Tetra Tech Company, is a global MEP engineering and commissioning firm focused on delivering Green Buildings That Work.	718
223. (219)	Alex Smith Tweeting mostly about the built environment – editor of CIBSE Journal	718
224. (221)	HVAC-Outlet, LLC http://t.co/5wG14dH98K Bringing professional grade thermostats and air purification to DIYers, HVAC Techs, and Contractors alike.	718
225. (217)	CABA CABA is a trade association focused on smart homes and intelligent buildings	717
226. (218)	Bouygues Energies & Services UK Bouygues Energies & Services is a client-focused facilities management, energy performance, and smart city partner.	717
227. (226)	Emerson Technicians & Skilled Trades Emerson Commercial and Residential Solutions - Industry channel designed to curate content for our #HVACR and #SkilledTrades audiences	716
228. (255)	Sara Kassam Head of Sustainability Development at CIBSE (views my own). Fascinated by #buildings and beyond..... mother of two girls #diversity #inclusion #WomeninSTEM	715
229. (224)	AndrewsWaterHeaters Andrews Water Heaters is the UK market leader for commercial hot water solutions. Andrews, built to perform.	715
230. (233)	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
231. (213)	Hilson Moran Leading multidisciplinary engineering consultancy for the built environment. Creating Environments for Life.	715
232. (223)	Jackson Systems, LLC Award-winning, innovative HVAC controls, direct-to-contractor. Like us on Facebook, too! https://t.co/WK4xHRvJ0C	714
233. (240)	Tridium Inc. The global leader in open platforms, application software frameworks, automation infrastructure, energy management & device-to-enterprise integration.	713
234. (249)	Steven Hunt Assoc Mechanical & Electrical Consulting Engineers based in #Liverpool - helping create buildings that come alive for 30 years	712
235. (237)	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	712
236. (239)	Luxaire HVAC The official Twitter account for Luxaire HVAC. Follow us to stay up to date with the latest news.	712
237. (256)	CPW East Mids Environmental Building Services Consultancy. Making buildings feel good. We are the East Midlands offices of CouchPerryWilkes.	711
238. (235)