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, 19th Feb 2020
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Rank	Player	Index
1. (1)	Schneider Electric With EcoStruxure™, we provide energy and automation digital solutions for efficiency and sustainability.	989
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.	930
4. (4)	Arup We're a firm of designers, planners, engineers, architects, consultants and technical specialists shaping a better world.	928
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.	916
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	907
8. (8)	PHPI Magazine The UK’s biggest heating & plumbing mag. Free to the trade at merchant counters nationwide. Home of #InstallOfFame	906
9. (11)	Janet T Beckett Chartered Engineer, HVAC & Low Carbon building designer, I work in construction. Democratic Socialist.	899
10. (9)	The IMechE Team We are the Institution of Mechanical Engineers (IMechE), and we are raising the profile of mechanical engineering.	897
11. (10)	IWFM The Institute of Workplace and Facilities Management (IWFM) is the professional body for workplace and facilities practitioners.	896
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 #smartHVAC	886
14. (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. 🙂	884
15. (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
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.	880
18. (18)	Honeywell At #Honeywell, we're transforming the way the world works. #futureshaper	873
19. (19)	Passivhaus Trust Leading the way in the UK for adoption of the #Passivhaus standard. UK affiliate of @the_iPHA.	867
20. (20)	IFMA Facility managers improve business and our lives. We help them make it possible.	865
21. (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	863
22. (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
23. (25)	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	853
24. (24)	AHR Expo Updates from the world's largest event for HVACR professionals. AHR Expo will head to Chicago in 2021! Save the dates January 25-27. #AHRexpo #HVACR #HVAC	851
25. (27)	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
26. (26)	Arcadis UK Arcadis is the leading global natural and built asset design and consultancy firm. LinkedIn: Arcadis United Kingdom	849
27. (23)	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	845
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.	843
29. (29)	Leviton Leading manufacturer of electrical wiring devices, lighting controls, network solutions, electric vehicle supply equipment & automation. Join us @LevitonCareers	842
30. (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.	839
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	837
33. (30)	Simon Owen Built environment recruiter, @CIBSEYrksAwards organiser, @CIBSE Yorkshire region committee member and #cycling obsessive. Taking a break from Twitter.	837
34. (34)	Buro Happold We're making the vision viable, helping to create amazing #buildings and #cities around the world.	836
35. (37)	Mott MacDonald Group Opening opportunities with connected thinking | Follow our staff and find out about career opportunities @MottMacLife | For early careers follow @MottMacFuture.	833
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. (39)	Lux Magazine Your independent guide to lighting.	831
38. (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
39. (41)	Facilties Show Facilities Show is the world's largest FM event, supported by IWFM. #FAC2020 #FacMan	830
40. (38)	Pro Electrician The magazine for the electrical trade. News, tech updates, product reviews, competitions. Available for free at electrical wholesale trade counters nationwide.	829
41. (44)	Passive House Plus Award-winning green building mag. Focus: evidence-based approaches for buildings to mitigate/adapt to climate change. IRL & UK editions	828
42. (35)	Nick Grant Passivhaus Consultant excited by Sustainable building design. Technical Director of UK Passivhaus Trust but views are mine or stolen.	828
43. (45)	ECA ECA is the UK’s leading trade association for electrotechnical and engineering services organisations. You can also follow our industry magazine @ECATodayonline	828
44. (42)	BDP BDP is a major international, interdisciplinary practice of architects, designers, engineers and urbanists.	826
45. (43)	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.	826
46. (46)	Energyinstitute The chartered professional membership body bringing together expertise for urgent global challenges. President @SteveJHolliday, CEO @KinghamEI.	825
47. (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
48. (48)	Kirsty Hammond Specifier Review – The building product news resource for specifiers. Architecture, design & innovation, news & views from the built environment.	823
49. (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
50. (49)	Electronic Specifier Electronic Specifier features the latest product & industry news, helping those in the electronics industry make informed choices.	821
51. (53)	Knauf Insulation UK Knauf Insulation is the UK’s leading insulation manufacturer creating energy efficient systems for buildings.	818
52. (51)	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.	818
53. (56)	Geberit For up to date news on Geberit products, innovations and real installations from installers.	818
54. (65)	BUILD UP The European portal for #energyefficiency in #buildings. #EPBD An initiative of the @EU_Commission. Disclaimer: https://t.co/35sqxDmJvq	817
55. (54)	Danfoss Group We are engineering solutions that allows the world to use resources in smarter ways & driving the #SustainableTransformation of tomorrow.	816
56. (55)	ASHRAEnews Shaping Tomorrow's Built Environment Today	816
57. (58)	EmersonComRes Comfortable, controllable indoor environments. Fresh, safe food throughout the cold chain. Energy-efficient technology to build sustainable infrastructures.	816
58. (57)	TheCIPHE The professional and voluntary regulatory body for the plumbing and heating engineering industry.	815
59. (52)	WELLcertified At IWBI we believe that buildings should be developed with people's health and wellness at the center of design. #WELLBuildingStandard #weareWELL	815
60. (62)	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.	815
61. (60)	Carrier HVACR A world leader in high-tech heating, air-conditioning & refrigeration solutions for residential, commercial, retail, transport & foodservice. Part of @Carrier.	814
62. (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
63. (61)	Siemens Buildings We’re not just about #buildings. We’re about what buildings make possible. https://t.co/rx3LpdDU9S #SmartInfrastructure	813
64. (59)	EnviroVent UK’s leading #manufacturer & supplier of energy efficient & sustainable #ventilation products.	813
65. (69)	Installer2019	813
66. (66)	Ecological Building At the forefront of airtight and windtight building products and natural insulations for over a decade.	813
67. (71)	Building Operating Management Leading magazine for #buildingowners, #facilitymanagers, and #cre executives in commercial, institutional and healthcare facilities.	812
68. (68)	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.	810
69. (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	810
70. (64)	HPM Magazine Heating & Plumbing Monthly is a must-read magazine in the #heating and #plumbing sector. http://t.co/8a0iQ8eozk	810
71. (70)	AECB Association for Environment Conscious Building ◦ We work with our members to inspire, develop and share sustainable building practice ◦ https://t.co/QMkVMdgy00	809
72. (67)	Green Building Store Products and technical support for Passivhaus and low energy buildings inc @GBSWindowsDoors & MVHR design. FREE Passivhaus & retrofit technical resources.	809
73. (79)	Legrand Products and systems for electrical installations and information networks. Solutions for residential, commercial & industrial buildings. 1-877-295-3472.	807
74. (74)	ARCADIS Design & Consultancy for natural and built assets. #Improvingqualityoflife	807
75. (76)	Cundall Cundall are multidisciplinary consulting engineers who operate in the UK, Ireland, Australia, Asia, MENA and Europe.	807
76. (72)	Hipmagazine The only magazine for plumbing and heating students and apprentices	807
77. (77)	WYG Group At WYG, we design, develop, and deliver interdisciplinary projects from technical solutions to complex challenges	806
78. (81)	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	805
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	805
80. (84)	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	804
81. (78)	Daikin España Perfil corporativo oficial de Daikin España para escuchar, conversar y compartir novedades de la compañía, climatización eficiente y calidad del aire	804
82. (83)	Stephen Gill Changing lives through engineering #Refrigeration #coolingforall #solarcooling #CircularEconomy #mentor @worldrefday #WREFD19 #STEM #neurodiversity #MenAsAllies	804
83. (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	802
84. (85)	Tomorrow's FM Tomorrow's FM is your online Facilities Management magazine. Editor: @Ryanthll	802
85. (92)	Mitsubishi Electric Mitsubishi Electric, Living Environment Systems. Energy efficient heating, cooling & ventilation solutions. Retweets not an endorsement.	801
86. (90)	SOM We are a collective of architects, designers, engineers, and planners building a better future.	801
87. (80)	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
88. (88)	PHAM News The technical magazine for plumbing, heating and air movement in the UK	799
89. (86)	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
90. (89)	Johnson Controls Sharing company and industry news from Johnson Controls' Building Technologies & Solutions. The global leader in building technology and services	798
91. (96)	SLL The SLL welcomes all those who are interested in any aspect of the world of light, lighting, and its applications.	796
92. (87)	Stewart Gilmour CA. FD/CFO. Architecture, R2R, Sustainabilty, Passivhaus, PropTech, Women's Health and HealthTech. MAMIOC. Views my own.	796
93. (94)	David Frise CEO BESA does M&E in built environment Long suffering Spurs fan. Oh & occasional stand up comedy. Views my own	796
94. (93)	Energist UK Your independent specialist for planning, sustainability and building regs. The latest industry news and activity from the team at Energist.	795
95. (100)	Sparks Magazine⚡️ The only magazine for electrical students and apprentices ⚡️ Follow SPARKS Apprentice of the Year at #SPARKSAOY20! https://t.co/O7AfS6II6U	795
96. (91)	YORK HVAC The official Twitter account for YORK HVAC. Follow us to stay up to date with the latest news.	795
97. (101)	P&FM Magazine PFM is the leading independent voice of the UK facilities management industry	795
98. (98)	NESEA.org Advancing #sustainable #building & #energy practices in the Northeast's built environment by connecting professionals to ideas, opportunities, and each other.	793
99. (95)	ACCA The Air Conditioning Contractors of America is the national association representing the nation's best heating, air conditioning, and refrigeration contractors.	793
100. (97)	UponorUK Uponor offers innovative plumbing and heating system solutions for all building types, available from your local merchant.	792
101. (107)	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.	792
102. (109)	AEE The Association of Energy Engineers is a nonprofit professional energy engineering society of 18,000 members.	792
103. (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.	790
104. (105)	Carrier We’ve forged entire industries, built iconic brands & pioneered over 100 years of firsts. This is the new Carrier and #ChangeIsInTheAir.	790
105. (102)	Kingspan Insulation #Kingspan #Insulation. Market leading manufacturer of insulation products & systems including Kingspan GreenGuard, OPTIM-R, Kooltherm, Therma & TEK.	790
106. (99)	Uponor North America Uponor offers sustainable systems for homes and commercial buildings. PEX plumbing, radiant heating/cooling, home fire sprinklers, hydronic piping.	790
107. (108)	Grant UK Leading heating manufacturer supplying award winning condensing oil boilers, renewables, cylinders, heat emitters & controls. Business partner of @BathRugby	788
108. (103)	CIBSEJournal Magazine of the Chartered Institution of Building Services Engineers	787
109. (106)	BESA BESA - The Building Engineering Services Association is the UK's leading trade organisation for building engineering services contractors.	787
110. (114)	Ramboll UK Ramboll provides multidisciplinary solutions that serve businesses, governments and communities around the world.	786
111. (128)	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!!	785
112. (116)	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	785
113. (110)	Pegler Yorkshire UK manufacturer of commercial & residential plumbing & heating products. Our social media team tweet about energy saving products & industry-related news	784
114. (111)	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
115. (112)	Parity Projects Award winning experts in home #energyefficiency and #retrofit. Services across the UK for #socialhousing #privatelandlords and #localauthorities.	783
116. (113)	Arcadis North America News and views from the North American region of the leading Design & Consultancy firm for natural and built assets. #Arcadis	780
117. (120)	Taco Comfort Welcome to Taco, a third generation, family owned American manufacturer of the highest quality comfort solutions for residential and commercial applications.	780
118. (121)	Rinnai UK World's Largest manufacturer of gas appliances, including high efficiency multi purpose water heaters and heating systems	780
119. (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.	779
120. (119)	World Plumbing Day Celebrate the important role plumbing plays in the health and safety of modern society - every year on March 11th. #WorldPlumbingDay	779
121. (118)	Philippe Moseley Work at @EU_Commission #EASME on #H2020 #energyefficiency and #renewables in #buildings and urban areas.	779
122. (123)	Sentinel Global water treatment experts for 30+ years; helping you clean, protect & maintain heating and hot water systems	779
123. (125)	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
124. (122)	Stroma Building sustainability & compliance! Certification, training, software & consultancy services – for a compliant, more energy-efficient built environment.	777
125. (130)	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	776
126. (117)	Chapman Ventilation We do restaurant ventilation. And we do it well.	776
127. (124)	NG Bailey NG Bailey is the UK’s leading independent engineering and services business with a deserved reputation for excellence. Passion | Integrity | Excellence	776
128. (133)	Setpoint Systems #SystemsIntegrator #BuildingControlSystems #BuildingAutomation #FacilitiesManagement #UL508A #EnergyEfficiency #IoT #CollaborativeSolutionsUnmatchedTraining	775
129. (141)	Click Scolmore Scolmore - Wiring accessories manufacturer ⚡	775
130. (150)	BBP Collaboration of the UK's leading commercial property owners who are working together to improve the sustainability of existing commercial building stock.	774
131. (131)	Hoare Lea Engineers of human experiences.	774
132. (137)	Kensa Heat Pumps The UK's only manufacturer and number one supplier of ground source heat pumps. For large installations visit Kensa Contracting: @KensaContracts	773
133. (127)	The IES Team Passionate about green building, software simulation tools for architects & engineers and consulting services for design and operation of sustainable buildings	773
134. (136)	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.	773
135. (134)	Plumbing&Mechanical Follow PM for all the latest breaking news, products, articles, and events in the plumbing, mechanical and hydronic heating industries.	773
136. (135)	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
137. (146)	Danfoss Cool We keep people, products and the planet cool. Food Retail, Air Conditioning, Industrial & Commercial Refrigeration #HVACR #Turbocor #Cooling #CoolApps	772
138. (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	772
139. (129)	HPAC Engineering Content provider for those who design, specify, operate, and maintain mechanical and building-automation systems in non-residential buildings.	772
140. (140)	Danfoss Drives Our portfolio of high-quality, application-optimized AC drives maximizes process performance, saves the most energy and minimizes emissions.	770
141. (138)	BoschSecuritySystems Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/J4kYrtVgF4	770
142. (132)	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
143. (126)	Dru Crawley #buildings: #tech, #performance, #netzeroenergy, #simulation, #BIM, #climatechange, #data, PhD, father of #EnergyPlus, Bentley Systems, views own	770
144. (147)	Tyco_IS Tyco is now Johnson Controls, the world leader in, security, fire protection, HVAC, building controls and energy storage.	770
145. (144)	Susie Diamond I am a partner at Inkling - a Building Physics consultancy keen to help make buildings more comfortable and energy efficient. #BuildingPhysics	769
146. (153)	Dr Penny Sarah Carey	769
147. (143)	Worcester Bosch Head to @WorcsBoschCare for homeowner support	769
148. (139)	OpenSensors.io OpenSensors aggregates data from a variety of sensors for the next generation of smart Building Management Systems.	767
149. (148)	Bosch Security EMEA Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/TNjjIZqIzQ	767
150. (145)	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	767
151. (151)	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. (166)	Andy SNIPEF membership officer. SNIPEF is the leading trade association for plumbing and heating businesses based in Scotland and Northern Ireland	763
153. (152)	Cullinan Studio Cullinan Studio is a cooperative architectural and masterplanning practice engaging with organisations and communities to connect people to nature.	763
154. (159)	Airflow Developments Airflow Developments Ltd. is globally recognized as long established ventilation specialists who move air efficiently, quietly and with the utmost reliability.	762
155. (158)	Testo UK Test and Measurement experts. Manufacture & Calibrate instruments for HVAC, Refrigeration, Catering, Food Processing & Climate Monitoring	762
156. (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.	762
157. (149)	CIPH News Canadian Institute of Plumbing & Heating (CIPH) - the association for plumbing, heating, hydronics, industrial, waterworks and other mechanical products.	761
158. (154)	ACR Journal Essential information for air conditioning and refrigeration professionals. Subscribe FREE online to the magazine or weekly newsletter.	760
159. (157)	NVent Nuheat nVent NuHeat is the leading brand for premium electric floor #heating in North America.	760
160. (155)	SES Engineering The UK’s leading design-led Mechanical & Electrical (M&E) provider, specialising in the design & installation of building services & infrastructure solutions	760
161. (156)	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
162. (169)	Mark Oliver H+H UK CEO @Colt_Group providing & servicing innovative & sustainable solutions & products for natural ventilation, smoke control, solar shading, louvre & climate	759
163. (160)	Claire Das Bhaumik Building Physicist. Partner at Inkling LLP. Using physics to make buildings more comfortable and energy efficient #BuildingPhysics	757
164. (163)	RDH Building Science We have a passion for Building Science. Specializing in Building Enclosure Consulting, Construction Project Management, Research, Energy and Forensics.	756
165. (175)	Memoori Smart Building Research & Thought Leadership.	755
166. (162)	Electrical Charity Supporting our people through life's challenges. The Electrical Industries Charity is the national charity for the electrical and energy industries.	754
167. (171)	Remeha Tweets from Remeha, the leading supplier of energy-efficient, low NOx commercial heating solutions.	753
168. (165)	PHCPPros Your professional plumbing, heating, cooling and piping community. #PHCNews #PlumbingEngineer #TheWholesaler #Especificar	753
169. (167)	BSRIA BSRIA's engineering, technical and market research experts provide independent and practical help in design, construction and occupancy of the built environment	752
170. (170)	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	751
171. (168)	HVROnlineEditor Interesting and quirky HVAC story tweets and retweets and our daily news feed.	751
172. (172)	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	750
173. (174)	SimonMcGuinness If you build a house, make sure its a certified Passive House.	750
174. (173)	SNIPEF SNIPEF is the leading trade association for plumbing and heating businesses in Scotland and Northern Ireland	748
175. (181)	Eric Stromquist I am in to HVAC controls, argentine tango, NLP, and using social media marketing to share information on building automation controls.	747
176. (190)	Altecnic Manufacturing accredited #plumbing & #heating equipment, raising industry best practice, making affordable systems safer, sustainable, easier to fit & maintain.	745
177. (176)	Sara MacLean Runs a low carbon PR consultancy. Writes about Building Services, Air Pollution, Sustainability and Construction...ex journalist – drinks lots of tea!	744
178. (185)	IAPMO Founded in 1926 #IAPMO is a world-wide nonprofit association focusing comprehensive capabilities on the technical aspects of #plumbing & #mechanical regulations	744
179. (164)	EHPA The European Heat Pump Association (EHPA) promotes awareness and deployment of #HeatPump technologies in Europe. Join the #HeatPump Community!	744
180. (179)	Smart HVAC Products We introduce new and innovative HVAC products to HVAC professionals. https://t.co/raFWzovYPT	744
181. (184)	Trimble MEP Trimble MEP consists of global employees providing software solutions to #electrical, #mechanical & #plumbing professionals. Part of the @TrimbleBuilding group.	743
182. (191)	TroupBywaters+Anders We are high performing, award-winning consulting building services engineers, bringing buildings to life for over 60 years.	742
183. (195)	Mitton Group Mitton is the name behind 1 of the UK’s leading building services groups providing professional & comprehensive mechanical building service solutions nationwide	740
184. (178)	Coffman Engineers Civil, structural, mechanical, electrical, fire protection, PMCM, corrosion control, pipeline integrity mgmt, commissioning, & industrial consulting engineers.	740
185. (186)	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
186. (194)	APCbySchneiderElecIN We combine Technology with Innovation to create a sustainable future and an energy efficient world. Join us in this journey of change!	739
187. (177)	Waterman Waterman is a multidisciplinary consultancy providing sustainable solutions to the property, infrastructure, energy and environmental markets.	739
188. (202)	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	736
189. (188)	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
190. (193)	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
191. (200)	IOR The Institute of Refrigeration, the UK hub for information on refrigeration, air conditioning and heat pump advancement	734
192. (189)	ECD Architects Energy Conscious Design is an award winning UK architectural practice committed to design excellence and sustainability. AECB fans and Passivhaus Trust members.	734
193. (182)	SELECT Updates Scotland's Trade Association for the Electrical Industry | Our main account with regular news updates	734
194. (205)	Hurley Palmer Flatt HDR | Hurley Palmer Flatt - engineering consultants, delivering design solutions globally. Leaders in mission critical engineering, energy and sustainability.	733
195. (187)	ACR News The only dedicated monthly UK trade magazine for the air conditioning and refrigeration industry.	733
196. (203)	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.	733
197. (209)	Construction Supplying responsibly sourced steel products and technical expertise to the construction industry including cladding systems, composite floor deck and tubes.	732
198. (208)	ESTA The UK’s Energy Management industry association for demand-side energy management and efficiency including buildings, processes and transport.	732
199. (192)	World Refrigeration Day #WorldRefrigerationDay is a global awareness raising campaign of the role of #airconditioning, #refrigeration, #heatpumps #WREFD19 #DíaMundialdelaRefrigeración	732
200. (201)	Mark Harris Divisional Technical Director at Kingspan Panels. Chairman of Engineered Panels in Construction. Interested in climate change & sustainable construction.	732
201. (210)	Zehnder UK Indoor Climate Solutions: Heating, Cooling & Ventilation.	731
202. (197)	Vital Energi UK’s market leaders for providing district heating, energy generation and energy management solutions. **Account not monitored out of office hours.	731
203. (199)	TLC Engineering An engineering firm that thinks boldly, listens attentively, and creates passionately.	730
204. (198)	CoolMentoring.org STEM Mentoring #coolmentoring #STEM #Mentor #beamentor	730
205. (219)	SALUS Controls SALUS Controls is a lead supplier of energy control solutions focused primarily on the European professional market channel. Think Heating, Think SALUS.	728
206. (180)	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.	727
207. (207)	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 .	727
208. (204)	PassiveHouseCal Passive House California (PHCA)'s mission is to educate the public about energy efficient & healthy buildings. https://t.co/mTI5kIid9q	726
209. (196)	Green Gateway Green Gateway is Mitsubishi Electric UK, Living Environmental Systems commitment to the environment. Re-tweets are not endorsements.	726
210. (246)	Titon Manufacturer and supplier of MVHR systems, trickle ventilators and window and door hardware. Office hours 8.15am - 4.45pm Monday to Friday.	726
211. (214)	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
212. (220)	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
213. (183)	ProRite M&E contractor, Design, Install & Maintain all District & Communal Heating Systems, HVAC, Controls, Pipework, Thermal Insulation, Water Treatment.	725
214. (211)	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.	724
215. (213)	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	724
216. (206)	Elementa Consulting Elementa is an award winning building services, low carbon and sustainability consultancy specialising in low energy design.	724
217. (218)	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
218. (216)	CIBSE West Midlands The Chartered Institution of Building Services Engineers (CIBSE) West Midlands region	723
219. (224)	Hilson Moran Leading multidisciplinary engineering consultancy for the built environment. Creating Environments for Life.	722
220. (221)	Glumac Engineers Glumac, a Tetra Tech Company, is a global MEP engineering and commissioning firm focused on delivering Green Buildings That Work.	721
221. (225)	Retrotec We are the world's leading blower door manufacturer, promoting green building through air tightness and enclosure integrity testing equip. & training.	721
222. (226)	Alex Smith Tweeting mostly about the built environment – editor of CIBSE Journal	720
223. (227)	HVAC-Outlet, LLC http://t.co/5wG14dH98K Bringing professional grade thermostats and air purification to DIYers, HVAC Techs, and Contractors alike.	719
224. (215)	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.	719
225. (222)	Sara Kassam Head of Sustainability Development at CIBSE (views my own). Fascinated by #buildings and beyond..... mother of two girls #diversity #inclusion #WomeninSTEM	719
226. (230)	Bouygues Energies & Services UK Bouygues Energies & Services is a client-focused facilities management, energy performance, and smart city partner.	718
227. (229)	Will R Head of Sustainability @clarion_group Expert in building energy & sustainability, but I never stop learning. My tweets are my own.	718
228. (223)	Emerson Technicians & Skilled Trades Emerson Commercial and Residential Solutions - Industry channel designed to curate content for our #HVACR and #SkilledTrades audiences	717
229. (233)	CABA CABA is a trade association focused on smart homes and intelligent buildings	717
230. (212)	Switch Automation Switch Automation creates technology to bring people and planet to the center of building operations.	716
231. (237)	Lindab UK At Lindab, we simplify construction. Because it is human nature to build, we make it easier to build sustainably.	716
232. (228)	AndrewsWaterHeaters Andrews Water Heaters is the UK market leader for commercial hot water solutions. Andrews, built to perform.	716
233. (271)	Ref_Industry #Refrigeration daily news. Join to #refindustry. Send your refrigeration news info@refindustry.com.	715
234. (234)	CPW East Mids Environmental Building Services Consultancy. Making buildings feel good. We are the East Midlands offices of CouchPerryWilkes.	715
235. (287)	Megaflo Heatrae Sadia MEGAFLO is the leading manufacturer of unvented water heating, which is the fastest growing sector of the UK market.	715
236. (255)	UrbanEnergy Research Heriot-Watt Urban Energy Research Group is currently participating in industrial action. For more details https://t.co/hZwjLwLfay	715
237. (248)	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.	714
238.