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.

• Subscribe FREE to stay up to date with news and rankings from SustMeme.

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, 12th Feb 2020
  Follow

Rank	Player	Index
1. (1)	Schneider Electric With EcoStruxure™, we provide energy and automation digital solutions for efficiency and sustainability.	987
2. (2)	IET The Institution of Engineering and Technology (IET) is a diverse home for engineering and technology across the world.	973
3. (3)	Atkins Official account of Atkins, member of @SNCLavalin, one of the world’s most respected design, engineering and project management consultancies.	931
4. (4)	Arup We're a firm of designers, planners, engineers, architects, consultants and technical specialists shaping a better world.	930
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.	917
6. (6)	Vaillant UK Vaillant is one of Europe's largest heating technology manufacturers. We monitor this page during office hours. For customer service, please call 0330 100 3150	911
7. (7)	SiemensUSA Unlocking the potential of digital transformation to positively impact society. #SiemensUSA	908
8. (8)	PHPI Magazine The UK’s biggest heating & plumbing mag. Free to the trade at merchant counters nationwide. Home of #InstallOfFame	905
9. (10)	The IMechE Team We are the Institution of Mechanical Engineers (IMechE), and we are raising the profile of mechanical engineering.	897
10. (9)	IWFM The Institute of Workplace and Facilities Management (IWFM) is the professional body for workplace and facilities practitioners.	897
11. (12)	Janet T Beckett Chartered Engineer, HVAC & Low Carbon building designer, I work in construction. Democratic Socialist.	890
12. (11)	CIBSE Chartered Institution of Building Services Engineers: dedicated to improving building performance through engineering excellence.	889
13. (13)	Mitsubishi Electric Experience total home comfort while conserving energy and filtering allergens — all at the touch of a button. #MakeYourselfComfortable #smartHVAC	886
14. (14)	Mitie The UK’s leading Facilities Management business delivering the exceptional, every day: #DigitalTransformation - Social media team here 9am - 5:30pm, Mon-Fri.	884
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. 🙂	883
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	881
17. (17)	Installer Magazine Installer is essential reading for heating, plumbing and renewable professionals.	878
18. (18)	Honeywell At #Honeywell, we're transforming the way the world works. #futureshaper	872
19. (19)	Passivhaus Trust Leading the way in the UK for adoption of the #Passivhaus standard. UK affiliate of @the_iPHA.	865
20. (21)	IFMA Facility managers improve business and our lives. We help them make it possible.	864
21. (20)	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.	863
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	859
23. (27)	Nathan James Van Gambling BA Hon. Heating Plumbing Energy Lecturer @lowcarbonhomes & int.speaker Hosts @betateachpod renewables podcast. Training consultant. @A_L_T member #solarheat #andragogy	853
24. (26)	AHR Expo Updates from the world's largest event for HVACR professionals. #AHRexpo #HVACR #HVAC	852
25. (23)	Facilitate Magazine Magazine of the Institute of Workplace and Facilities Management @IWFM_UK | Winner, Best Magazine, 2019 Association Excellence Awards | For jobs see @IWFM_Jobs	852
26. (25)	Arcadis UK Arcadis is the leading global natural and built asset design and consultancy firm. LinkedIn: Arcadis United Kingdom	851
27. (24)	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.	850
28. (28)	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.	846
29. (29)	Leviton Leading manufacturer of electrical wiring devices, lighting controls, network solutions, electric vehicle supply equipment & automation. Join us @LevitonCareers	843
30. (30)	Simon Owen Built environment recruiter, @CIBSEYrksAwards organiser, @CIBSE Yorkshire region committee member and #cycling obsessive. Taking a break from Twitter.	840
31. (31)	Official NICEIC News, views and information from NICEIC, the UK's leading registration body for the electrical contracting industry. Always choose an NICEIC contractor.	839
32. (32)	WSP In The UK We are WSP in the UK – leading professional services consultancy. We provide news & updates about all things WSP. #WeAreWSP	839
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.	838
34. (34)	Buro Happold We're making the vision viable, helping to create amazing #buildings and #cities around the world.	834
35. (36)	Nick Grant Passivhaus Consultant excited by Sustainable building design. Technical Director of UK Passivhaus Trust but views are mine or stolen.	834
36. (37)	WSP WSP is one of the world’s leading professional services firms. L'une des plus importantes sociétés de services professionnels du monde.	833
37. (35)	Mott MacDonald Group Opening opportunities with connected thinking | Follow our staff and find out about career opportunities @MottMacLife | For early careers follow @MottMacFuture.	833
38. (41)	Pro Electrician The magazine for the electrical trade. News, tech updates, product reviews, competitions. Available for free at electrical wholesale trade counters nationwide.	831
39. (39)	Lux Magazine Your independent guide to lighting.	830
40. (40)	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	830
41. (38)	Facilties Show Facilities Show is the world's largest FM event, supported by IWFM. #FAC2020 #FacMan	829
42. (44)	BDP BDP is a major international, interdisciplinary practice of architects, designers, engineers and urbanists.	829
43. (42)	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.	828
44. (43)	Passive House Plus Award-winning green building mag. Focus: evidence-based approaches for buildings to mitigate/adapt to climate change. IRL & UK editions	828
45. (45)	ECA ECA is the UK’s leading trade association for electrotechnical and engineering services organisations. You can also follow our industry magazine @ECATodayonline	827
46. (48)	Energyinstitute The chartered professional membership body bringing together expertise for urgent global challenges. President @SteveJHolliday, CEO @KinghamEI.	826
47. (46)	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
48. (49)	Kirsty Hammond Specifier Review – The building product news resource for specifiers. Architecture, design & innovation, news & views from the built environment.	824
49. (51)	Electronic Specifier Electronic Specifier features the latest product & industry news, helping those in the electronics industry make informed choices.	821
50. (50)	Lutron Electronics Lutron Electronics is a leading manufacturer of energy-saving light, shade, and temperature controls for new and existing homes and offices.	821
51. (47)	Rob Berridge EngTech Heating Design/Consultancy, Est:1984. We don’t have an energy crisis, we have a wastage crisis! Own views but always up for debate. #BeaPro RT not endorsement.	821
52. (53)	WELLcertified At IWBI we believe that buildings should be developed with people's health and wellness at the center of design. #WELLBuildingStandard #weareWELL	820
53. (52)	Knauf Insulation UK Knauf Insulation is the UK’s leading insulation manufacturer creating energy efficient systems for buildings.	820
54. (56)	Danfoss Group We are engineering solutions that allows the world to use resources in smarter ways & driving the #SustainableTransformation of tomorrow.	817
55. (55)	ASHRAEnews Shaping Tomorrow's Built Environment Today	817
56. (64)	Geberit For up to date news on Geberit products, innovations and real installations from installers.	816
57. (57)	TheCIPHE The professional and voluntary regulatory body for the plumbing and heating engineering industry.	816
58. (54)	EmersonComRes Comfortable, controllable indoor environments. Fresh, safe food throughout the cold chain. Energy-efficient technology to build sustainable infrastructures.	816
59. (60)	EnviroVent UK’s leading #manufacturer & supplier of energy efficient & sustainable #ventilation products.	815
60. (58)	Carrier HVACR A world leader in high-tech heating, air-conditioning & refrigeration solutions for residential, commercial, retail, transport & foodservice. Part of @Carrier.	814
61. (65)	Siemens Buildings We’re not just about #buildings. We’re about what buildings make possible. https://t.co/rx3LpdDU9S #SmartInfrastructure	814
62. (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.	813
63. (63)	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.	813
64. (68)	HPM Magazine Heating & Plumbing Monthly is a must-read magazine in the #heating and #plumbing sector. http://t.co/8a0iQ8eozk	812
65. (61)	BUILD UP The European portal for #energyefficiency in #buildings. #EPBD An initiative of the @EU_Commission. Disclaimer: https://t.co/35sqxDmJvq	812
66. (66)	Ecological Building At the forefront of airtight and windtight building products and natural insulations for over a decade.	812
67. (67)	Green Building Store Products and technical support for Passivhaus and low energy buildings inc @GBSWindowsDoors & MVHR design. FREE Passivhaus & retrofit technical resources.	811
68. (69)	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.	811
69. (62)	Installer2019	809
70. (76)	AECB Association for Environment Conscious Building ◦ We work with our members to inspire, develop and share sustainable building practice ◦ https://t.co/QMkVMdgy00	809
71. (75)	Building Operating Management Leading magazine for #buildingowners, #facilitymanagers, and #cre executives in commercial, institutional and healthcare facilities.	809
72. (79)	Hipmagazine The only magazine for plumbing and heating students and apprentices	809
73. (73)	PHEX A free to attend exhibition for the plumbing and heating community, offering insight into the latest tools, products and technology. Follow our insta: @phexshow	808
74. (72)	ARCADIS Design & Consultancy for natural and built assets. #Improvingqualityoflife	808
75. (74)	Electrical Times Welcome to Electrical Times magazine – the voice of electrical contracting. Editor: lisa.peake@purplems.com See also: https://t.co/orc5zZEVNi	807
76. (70)	Cundall Cundall are multidisciplinary consulting engineers who operate in the UK, Ireland, Australia, Asia, MENA and Europe.	807
77. (78)	WYG Group At WYG, we design, develop, and deliver interdisciplinary projects from technical solutions to complex challenges	807
78. (77)	Daikin España Perfil corporativo oficial de Daikin España para escuchar, conversar y compartir novedades de la compañía, climatización eficiente y calidad del aire	806
79. (80)	Legrand Products and systems for electrical installations and information networks. Solutions for residential, commercial & industrial buildings. 1-877-295-3472.	805
80. (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	804
81. (71)	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	804
82. (82)	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	804
83. (85)	Stephen Gill Changing lives through engineering #Refrigeration #coolingforall #solarcooling #CircularEconomy #mentor @worldrefday #WREFD19 #STEM #neurodiversity #MenAsAllies	802
84. (81)	LIGHTFAIR Let's talk lighting. Register for the year's most exciting trade show, conference and networking event. May 3-7, 2020 Las Vegas Convention Center, Las Vegas, NV	802
85. (83)	Tomorrow's FM Tomorrow's FM is your online Facilities Management magazine. Editor: @Ryanthll	801
86. (92)	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	799
87. (100)	Stewart Gilmour CA. FD/CFO. Architecture, R2R, Sustainabilty, Passivhaus, PropTech, Women's Health and HealthTech. MAMIOC. Views my own.	799
88. (89)	PHAM News The technical magazine for plumbing, heating and air movement in the UK	799
89. (90)	Johnson Controls Sharing company and industry news from Johnson Controls' Building Technologies & Solutions. The global leader in building technology and services	799
90. (87)	SOM We are a collective of architects, designers, engineers, and planners building a better future.	798
91. (93)	YORK HVAC The official Twitter account for YORK HVAC. Follow us to stay up to date with the latest news.	798
92. (91)	Mitsubishi Electric Mitsubishi Electric, Living Environment Systems. Energy efficient heating, cooling & ventilation solutions. Retweets not an endorsement.	797
93. (94)	Energist UK Your independent specialist for planning, sustainability and building regs. The latest industry news and activity from the team at Energist.	797
94. (88)	David Frise CEO BESA does M&E in built environment Long suffering Spurs fan. Oh & occasional stand up comedy. Views my own	797
95. (97)	ACCA The Air Conditioning Contractors of America is the national association representing the nation's best heating, air conditioning, and refrigeration contractors.	795
96. (84)	SLL The SLL welcomes all those who are interested in any aspect of the world of light, lighting, and its applications.	795
97. (95)	UponorUK Uponor offers innovative plumbing and heating system solutions for all building types, available from your local merchant.	794
98. (96)	NESEA.org Advancing #sustainable #building & #energy practices in the Northeast's built environment by connecting professionals to ideas, opportunities, and each other.	794
99. (101)	Uponor North America Uponor offers sustainable systems for homes and commercial buildings. PEX plumbing, radiant heating/cooling, home fire sprinklers, hydronic piping.	792
100. (98)	Sparks Magazine⚡️ The only magazine for electrical students and apprentices ⚡️ Follow SPARKS Apprentice of the Year at #SPARKSAOY20! https://t.co/O7AfS6II6U	791
101. (99)	P&FM Magazine PFM is the leading independent voice of the UK facilities management industry	791
102. (104)	Kingspan Insulation #Kingspan #Insulation. Market leading manufacturer of insulation products & systems including Kingspan GreenGuard, OPTIM-R, Kooltherm, Therma & TEK.	789
103. (107)	CIBSEJournal Magazine of the Chartered Institution of Building Services Engineers	788
104. (103)	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.	788
105. (109)	Carrier We’ve forged entire industries, built iconic brands & pioneered over 100 years of firsts. This is the new Carrier and #ChangeIsInTheAir.	788
106. (106)	BESA BESA - The Building Engineering Services Association is the UK's leading trade organisation for building engineering services contractors.	788
107. (105)	Daikin UK Daikin UK offer the widest range of high quality heat pump, air conditioning, ventilation, refrigeration and applied system solutions available on the market.	788
108. (112)	Grant UK Leading heating manufacturer supplying award winning condensing oil boilers, renewables, cylinders, heat emitters & controls. Business partner of @BathRugby	787
109. (102)	AEE The Association of Energy Engineers is a nonprofit professional energy engineering society of 18,000 members.	787
110. (114)	Pegler Yorkshire UK manufacturer of commercial & residential plumbing & heating products. Our social media team tweet about energy saving products & industry-related news	784
111. (108)	New Buildings Inst. A driving force for better energy performance in buildings...NBI assesses technologies, promotes design approaches, and helps guide policies and programs	784
112. (110)	Parity Projects Award winning experts in home #energyefficiency and #retrofit. Services across the UK for #socialhousing #privatelandlords and #localauthorities.	784
113. (119)	Arcadis North America News and views from the North American region of the leading Design & Consultancy firm for natural and built assets. #Arcadis	783
114. (111)	Ramboll UK Ramboll provides multidisciplinary solutions that serve businesses, governments and communities around the world.	783
115. (115)	Alpha Innovation Domestic and commercial gas boilers. We monitor this page during office hours Monday to Friday. For customer service, please call 0344 871 8760.	783
116. (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	781
117. (116)	Chapman Ventilation We do restaurant ventilation. And we do it well.	781
118. (118)	Philippe Moseley Work at @EU_Commission #EASME on #H2020 #energyefficiency and #renewables in #buildings and urban areas.	781
119. (122)	World Plumbing Day Celebrate the important role plumbing plays in the health and safety of modern society - every year on March 11th. #WorldPlumbingDay	780
120. (113)	Taco Comfort Welcome to Taco, a third generation, family owned American manufacturer of the highest quality comfort solutions for residential and commercial applications.	780
121. (123)	Rinnai UK World's Largest manufacturer of gas appliances, including high efficiency multi purpose water heaters and heating systems	780
122. (121)	Stroma Building sustainability & compliance! Certification, training, software & consultancy services – for a compliant, more energy-efficient built environment.	778
123. (120)	Sentinel We protect domestic & commercial #heating & #hotwater systems by providing best practice solutions & products internationally. Account hours: Mon-Fri 9-5.	778
124. (126)	NG Bailey NG Bailey is the UK’s leading independent engineering and services business with a deserved reputation for excellence. Passion | Integrity | Excellence	777
125. (127)	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	777
126. (136)	Dru Crawley #buildings: #tech, #performance, #netzeroenergy, #simulation, #BIM, #climatechange, #data, PhD, father of #EnergyPlus, Bentley Systems, views own	775
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	775
128. (124)	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!!	774
129. (131)	HPAC Engineering Content provider for those who design, specify, operate, and maintain mechanical and building-automation systems in non-residential buildings.	774
130. (128)	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. (129)	Hoare Lea Engineers of human experiences.	774
132. (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	774
133. (132)	Setpoint Systems #SystemsIntegrator #BuildingControlSystems #BuildingAutomation #FacilitiesManagement #UL508A #EnergyEfficiency #IoT #CollaborativeSolutionsUnmatchedTraining	774
134. (135)	Plumbing&Mechanical Follow PM for all the latest breaking news, products, articles, and events in the plumbing, mechanical and hydronic heating industries.	774
135. (134)	CALMAC Use energy more wisely with Thermal Battery cooling featuring Ice Bank #energystorage, for a more sustainable future. Over 1 GW in 60 countries.	773
136. (133)	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.	772
137. (149)	Kensa Heat Pumps The UK's only manufacturer and number one supplier of ground source heat pumps. For large installations visit Kensa Contracting: @KensaContracts	772
138. (138)	BoschSecuritySystems Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/J4kYrtVgF4	771
139. (139)	OpenSensors.io OpenSensors aggregates data from a variety of sensors for the next generation of smart Building Management Systems.	771
140. (143)	Danfoss Drives Our portfolio of high-quality, application-optimized AC drives maximizes process performance, saves the most energy and minimizes emissions.	770
141. (137)	Click Scolmore Scolmore - Wiring accessories manufacturer ⚡	769
142. (142)	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
143. (146)	Worcester Bosch Head to @WorcsBoschCare for homeowner support	769
144. (148)	Susie Diamond I am a partner at Inkling - a Building Physics consultancy keen to help make buildings more comfortable and energy efficient. #BuildingPhysics	768
145. (144)	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	768
146. (141)	Danfoss Cool We keep people, products and the planet cool. Food Retail, Air Conditioning, Industrial & Commercial Refrigeration #HVACR #Turbocor #Cooling #CoolApps	768
147. (147)	Tyco_IS Tyco is now Johnson Controls, the world leader in, security, fire protection, HVAC, building controls and energy storage.	768
148. (140)	Bosch Security EMEA Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/TNjjIZqIzQ	767
149. (153)	CIPH News Canadian Institute of Plumbing & Heating (CIPH) - the association for plumbing, heating, hydronics, industrial, waterworks and other mechanical products.	767
150. (125)	BBP Collaboration of the UK's leading commercial property owners who are working together to improve the sustainability of existing commercial building stock.	767
151. (150)	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
152. (152)	Cullinan Studio Cullinan Studio is a cooperative architectural and masterplanning practice engaging with organisations and communities to connect people to nature.	765
153. (157)	Dr Penny Sarah Carey	763
154. (151)	ACR Journal Essential information for air conditioning and refrigeration professionals. Subscribe FREE online to the magazine or weekly newsletter.	763
155. (173)	SES Engineering The UK’s leading design-led Mechanical & Electrical (M&E) provider, specialising in the design & installation of building services & infrastructure solutions	762
156. (162)	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.	762
157. (154)	NVent Nuheat nVent NuHeat is the leading brand for premium electric floor #heating in North America.	760
158. (158)	Testo UK Test and Measurement experts. Manufacture & Calibrate instruments for HVAC, Refrigeration, Catering, Food Processing & Climate Monitoring	760
159. (188)	Airflow Developments Airflow Developments Ltd. is globally recognized as long established ventilation specialists who move air efficiently, quietly and with the utmost reliability.	759
160. (164)	Claire Das Bhaumik Building Physicist. Partner at Inkling LLP. Making buildings more comfortable and energy efficient #BuildingPhysics	759
161. (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.	758
162. (159)	Electrical Charity Supporting our people through life's challenges. The Electrical Industries Charity is the national charity for the electrical and energy industries.	758
163. (165)	RDH Building Science We have a passion for Building Science. Specializing in Building Enclosure Consulting, Construction Project Management, Research, Energy and Forensics.	757
164. (184)	EHPA The European Heat Pump Association (EHPA) promotes awareness and deployment of #HeatPump technologies in Europe. Join the #HeatPump Community!	757
165. (169)	PHCPPros Your professional plumbing, heating, cooling and piping community. #PHCNews #PlumbingEngineer #TheWholesaler #Especificar	757
166. (155)	Andy SNIPEF membership officer. SNIPEF is the leading trade association for plumbing and heating businesses based in Scotland and Northern Ireland	755
167. (163)	BSRIA BSRIA's engineering, technical and market research experts provide independent and practical help in design, construction and occupancy of the built environment	754
168. (172)	HVROnlineEditor Interesting and quirky HVAC story tweets and retweets and our daily news feed.	754
169. (160)	Mark Oliver H+H UK CEO @Colt_Group providing & servicing innovative & sustainable solutions & products for natural ventilation, smoke control, solar shading, louvre & climate	754
170. (156)	Toby Cambray M&E and Building Physics Consultant Engineer, specialising in low energy and sustainable design. Tweets on that and whatever else pops into my head	753
171. (171)	Remeha Tweets from Remeha, the leading supplier of energy-efficient, low NOx commercial heating solutions.	753
172. (167)	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	751
173. (170)	SNIPEF SNIPEF is the leading trade association for plumbing and heating businesses in Scotland and Northern Ireland	750
174. (166)	SimonMcGuinness If you build a house, make sure its a certified Passive House.	749
175. (168)	Memoori Smart Building Research & Thought Leadership.	748
176. (179)	Sara MacLean Runs a low carbon PR consultancy. Writes about Building Services, Air Pollution, Sustainability and Construction...ex journalist – drinks lots of tea!	747
177. (174)	Waterman Waterman is a multidisciplinary consultancy providing sustainable solutions to the property, infrastructure, energy and environmental markets.	747
178. (185)	Coffman Engineers Civil, structural, mechanical, electrical, fire protection, PMCM, corrosion control, pipeline integrity mgmt, commissioning, & industrial consulting engineers.	745
179. (178)	Smart HVAC Products We introduce new and innovative HVAC products to HVAC professionals. https://t.co/raFWzovYPT	744
180. (193)	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.	743
181. (177)	Eric Stromquist I am in to HVAC controls, argentine tango, NLP, and using social media marketing to share information on building automation controls.	743
182. (181)	SELECT Updates Scotland's Trade Association for the Electrical Industry | Our main account with regular news updates	742
183. (182)	ProRite M&E contractor, Design, Install & Maintain all District & Communal Heating Systems, HVAC, Controls, Pipework, Thermal Insulation, Water Treatment.	742
184. (183)	Trimble MEP Trimble MEP consists of global employees providing software solutions to #electrical, #mechanical & #plumbing professionals. Part of the @TrimbleBuilding group.	742
185. (187)	IAPMO Founded in 1926 #IAPMO is a world-wide nonprofit association focusing comprehensive capabilities on the technical aspects of #plumbing & #mechanical regulations	740
186. (175)	Timo Ruohomäki Director, IoT and Data at Forum Virium, the innovation company of City of Helsinki. #smartcity #urbanplatform #kafka #geospatial #CityGML #energy #BEMS #BAS	740
187. (201)	ACR News The only dedicated monthly UK trade magazine for the air conditioning and refrigeration industry.	737
188. (190)	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	736
189. (194)	ECD Architects Energy Conscious Design is an award winning UK architectural practice committed to design excellence and sustainability. AECB fans and Passivhaus Trust members.	736
190. (191)	Altecnic Manufacturing accredited #plumbing & #heating equipment, raising industry best practice, making affordable systems safer, sustainable, easier to fit & maintain.	735
191. (196)	TroupBywaters+Anders We are high performing, award-winning consulting building services engineers, bringing buildings to life for over 60 years.	735
192. (189)	World Refrigeration Day #WorldRefrigerationDay is a global awareness raising campaign of the role of #airconditioning, #refrigeration, #heatpumps #WREFD19 #DíaMundialdelaRefrigeración	735
193. (176)	LG UK B2B LG Electronics UK Business Solutions. Innovative and cutting edge technology for Commercial Display, Hotel TV, Heat Pumps, Air Conditioning and Energy Solutions	734
194. (180)	APCbySchneiderElecIN We combine Technology with Innovation to create a sustainable future and an energy efficient world. Join us in this journey of change!	734
195. (186)	Mitton Group Mitton is the name behind 1 of the UK’s leading building services groups providing professional & comprehensive mechanical building service solutions nationwide	733
196. (209)	Green Gateway Green Gateway is Mitsubishi Electric UK, Living Environmental Systems commitment to the environment. Re-tweets are not endorsements.	732
197. (195)	Vital Energi UK’s market leaders for providing district heating, energy generation and energy management solutions. **Account not monitored out of office hours.	732
198. (207)	CoolMentoring.org STEM Mentoring #coolmentoring #STEM #Mentor #beamentor	732
199. (199)	TLC Engineering An engineering firm that thinks boldly, listens attentively, and creates passionately.	732
200. (198)	IOR The Institute of Refrigeration, the UK hub for information on refrigeration, air conditioning and heat pump advancement	732
201. (200)	Mark Harris Divisional Technical Director at Kingspan Panels. Chairman of Engineered Panels in Construction. Interested in climate change & sustainable construction.	732
202. (192)	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	731
203. (208)	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.	731
204. (204)	PassiveHouseCal Passive House California (PHCA)'s mission is to educate the public about energy efficient & healthy buildings. https://t.co/mTI5kIid9q	730
205. (203)	Hurley Palmer Flatt HDR | Hurley Palmer Flatt - engineering consultants, delivering design solutions globally. Leaders in mission critical engineering, energy and sustainability.	729
206. (224)	Elementa Consulting Elementa is an award winning building services, low carbon and sustainability consultancy specialising in low energy design.	729
207. (218)	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 .	728
208. (206)	ESTA The UK’s Energy Management industry association for demand-side energy management and efficiency including buildings, processes and transport.	728
209. (197)	Construction Supplying responsibly sourced steel products and technical expertise to the construction industry including cladding systems, composite floor deck and tubes.	728
210. (214)	Zehnder UK Indoor Climate Solutions: Heating, Cooling & Ventilation.	727
211. (222)	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.	727
212. (211)	Switch Automation Switch Automation creates technology to bring people and planet to the center of building operations.	726
213. (210)	Reznor The UK's leading supplier of warm air heating and radiant heating systems to the industrial and commercial markets as part of Nortek Global HVAC	726
214. (205)	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.	726
215. (223)	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
216. (202)	CIBSE West Midlands The Chartered Institution of Building Services Engineers (CIBSE) West Midlands region	725
217. (264)	Smartcool Systems Inc. Smartcool Systems Inc. (TSXV: SSC) provides cutting edge energy efficient & energy cost reduction solutions... For more information: mike.kordysz@smartcool.net	725
218. (212)	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
219. (213)	SALUS Controls SALUS Controls is a lead supplier of energy control solutions focused primarily on the European professional market channel. Think Heating, Think SALUS.	723
220. (215)	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
221. (221)	Glumac Engineers Glumac, a Tetra Tech Company, is a global MEP engineering and commissioning firm focused on delivering Green Buildings That Work.	722
222. (216)	Sara Kassam Head of Sustainability Development at CIBSE (views my own). Fascinated by #buildings and beyond..... mother of two girls #diversity #inclusion #WomeninSTEM	722
223. (230)	Emerson Technicians & Skilled Trades Emerson Commercial and Residential Solutions - Industry channel designed to curate content for our #HVACR and #SkilledTrades audiences	721
224. (217)	Hilson Moran Leading multidisciplinary engineering consultancy for the built environment. Creating Environments for Life.	720
225. (232)	Retrotec We are the world's leading blower door manufacturer, promoting green building through air tightness and enclosure integrity testing equip. & training.	720
226. (220)	Alex Smith Tweeting mostly about the built environment – editor of CIBSE Journal	720
227. (228)	HVAC-Outlet, LLC http://t.co/5wG14dH98K Bringing professional grade thermostats and air purification to DIYers, HVAC Techs, and Contractors alike.	719
228. (226)	AndrewsWaterHeaters Andrews Water Heaters is the UK market leader for commercial hot water solutions. Andrews, built to perform.	719
229. (227)	Will R Head of Sustainability @clarion_group Expert in building energy & sustainability, but I never stop learning. My tweets are my own.	719
230. (219)	Bouygues Energies & Services UK Bouygues Energies & Services is a client-focused facilities management, energy performance, and smart city partner.	717
231. (229)	Atelier Ten As environmental design consultants and building services engineers we are committed to high-performance and sustainable design within the built environment.	717
232. (238)	Jackson Systems, LLC Award-winning, innovative HVAC controls, direct-to-contractor. Like us on Facebook, too! https://t.co/WK4xHRvJ0C	717
233. (225)	CABA CABA is a trade association focused on smart homes and intelligent buildings	717
234. (235)	CPW East Mids Environmental Building Services Consultancy. Making buildings feel good. We are the East Midlands offices of CouchPerryWilkes.	716
235. (283)	Senseware #IoTPlatform for rapid #IoT solution architecting. Accelerate time to market with real-time cloud services #DigitalTransformation #Industry40 #digitization #IAQ	715
236. (246)	Steven Hunt Assoc Mechanical & Electrical Consulting Engineers based in #Liverpool - helping create buildings that come alive for 30 years	714
237. (234)	Lindab UK At Lindab, we simplify construction. Because it is human nature to build, we make it easier to build sustainably.	714
238.