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, 15th Jan 2020
  Follow

Rank	Player	Index
1. (1)	Schneider Electric With EcoStruxure™, we provide energy and automation digital solutions for efficiency and sustainability.	986
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	971
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 Designers, planners, engineers, consultants & technical specialists shaping a better world.	929
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.	918
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	909
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	902
9. (9)	The IMechE Team We are the Institution of Mechanical Engineers (IMechE), and we are raising the profile of mechanical engineering.	896
10. (11)	Janet T Beckett Chartered Engineer, HVAC & Low Carbon building designer, I work in construction. Democratic Socialist.	895
11. (10)	IWFM The Institute of Workplace and Facilities Management (IWFM) is the professional body for workplace and facilities practitioners.	894
12. (12)	CIBSE Chartered Institution of Building Services Engineers: dedicated to improving building performance through engineering excellence.	889
13. (14)	Mitsubishi Electric Experience total home comfort while conserving energy and filtering allergens — all at the touch of a button. #MakeYourselfComfortable	886
14. (13)	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. (15)	Mitie The UK’s leading Facilities Management business delivering the exceptional, every day: #DigitalTransformation - Social media team here 9am - 5:30pm, Mon-Fri.	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	880
17. (17)	Installer Magazine Installer is essential reading for heating, plumbing and renewable professionals.	877
18. (18)	Honeywell At #Honeywell, we're transforming the way the world works. #futureshaper	872
19. (19)	Saint-Gobain Designs, manufactures + distributes materials + solutions which are key ingredients in the wellbeing of each of us and the future of all. Improving Daily Lives.	864
20. (20)	IFMA Facility managers improve business and our lives. We help them make it possible.	863
21. (21)	Passivhaus Trust Leading the way in the UK for adoption of the #Passivhaus standard. UK affiliate of @the_iPHA.	862
22. (25)	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.	857
23. (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	856
24. (26)	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	854
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	851
26. (24)	Arcadis UK Arcadis is the leading global natural and built asset design and consultancy firm. LinkedIn: Arcadis United Kingdom	851
27. (27)	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	846
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.	844
29. (29)	Leviton Leading manufacturer of electrical wiring devices, lighting controls, network solutions, electric vehicle supply equipment & automation. Join us @LevitonCareers	840
30. (30)	Simon Owen Built environment recruiter, @CIBSEYrksAwards organiser, @CIBSE Yorkshire region committee member and #cycling obsessive. Taking a break from Twitter.	840
31. (33)	WSP In The UK We are WSP in the UK – leading professional services consultancy. We provide news & updates about all things WSP. #WeAreWSP	840
32. (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
33. (36)	WSP WSP is one of the world’s leading professional services firms. L'une des plus importantes sociétés de services professionnels du monde.	835
34. (32)	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.	835
35. (34)	Buro Happold We're making the vision viable, helping to create amazing #buildings and #cities around the world.	833
36. (35)	Mott MacDonald Group Opening opportunities with connected thinking | Follow our staff and find out about career opportunities @MottMacLife | For early careers follow @MottMacFuture.	832
37. (38)	Lux Magazine Your independent guide to lighting.	832
38. (40)	Nick Grant Passivhaus Consultant excited by Sustainable building design. Technical Director of UK Passivhaus Trust but views are mine or stolen.	831
39. (42)	Passive House Plus Award-winning green building mag. Focus: evidence-based approaches for buildings to mitigate/adapt to climate change. IRL & UK editions	830
40. (37)	Facilties Show Facilities Show is the world's largest FM event, supported by IWFM. #FAC2020 #FacMan	830
41. (41)	FMJ FMJ is the leading resource for the FM sector, providing industry-specific intelligence for the public and private sectors. #facman See jobs at @fmjobfinder	828
42. (39)	Pro Electrician The magazine for the electrical trade. News, tech updates, product reviews, competitions. Available for free at electrical wholesale trade counters nationwide.	827
43. (44)	BDP BDP is a major international, interdisciplinary practice of architects, designers, engineers and urbanists.	826
44. (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
45. (43)	ECA ECA is the UK’s leading trade association for electrotechnical and engineering services organisations. You can also follow our industry magazine @ECATodayonline	824
46. (45)	Kirsty Hammond Specifier Review – The building product news resource for specifiers. Architecture, design & innovation, news & views from the built environment.	824
47. (48)	Energyinstitute The chartered professional membership body bringing together expertise for urgent global challenges. President @SteveJHolliday, CEO @KinghamEI.	823
48. (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.	823
49. (49)	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. (51)	Electronic Specifier Electronic Specifier features the latest product & industry news, helping those in the electronics industry make informed choices.	820
51. (52)	Knauf Insulation UK Knauf Insulation is the UK’s leading insulation manufacturer creating energy efficient systems for buildings.	819
52. (50)	Wolseley UK A handy source of news and views for the trade. Specialists for plumbing, heating, cooling, drainage, mechanical & parts. Formerly called Plumb Center UK.	819
53. (66)	BUILD UP The European portal for #energyefficiency in #buildings. #EPBD An initiative of the @EU_Commission. Disclaimer: https://t.co/35sqxDmJvq	817
54. (62)	WELLcertified At IWBI we believe that buildings should be developed with people's health and wellness at the center of design. #WELLBuildingStandard #weareWELL	817
55. (59)	ASHRAEnews Shaping Tomorrow's Built Environment Today	816
56. (53)	Danfoss Group We are engineering solutions that allows the world to use resources in smarter ways & driving the #SustainableTransformation of tomorrow.	816
57. (56)	EmersonComRes Comfortable, controllable indoor environments. Fresh, safe food throughout the cold chain. Energy-efficient technology to build sustainable infrastructures.	815
58. (55)	TheCIPHE The professional and voluntary regulatory body for the plumbing and heating engineering industry.	815
59. (60)	EnviroVent UK’s leading #manufacturer & supplier of energy efficient & sustainable #ventilation products.	814
60. (67)	Ecological Building At the forefront of airtight and windtight building products and natural insulations for over a decade.	813
61. (54)	Geberit For up to date news on Geberit products, innovations and real installations from installers.	813
62. (61)	Siemens Buildings We’re not just about #buildings. We’re about what buildings make possible. https://t.co/rx3LpdDU9S #SmartInfrastructure	812
63. (63)	VENT-AXIA Vent-Axia continues to lead the way in improving the indoor environment by supplying air management solutions in the UK and around the world.	812
64. (57)	Carrier HVACR A world leader in high-tech heating, air-conditioning & refrigeration solutions for residential, commercial, retail, transport & foodservice. Part of @Carrier.	812
65. (58)	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.	811
66. (68)	Building Operating Management Leading magazine for #buildingowners, #facilitymanagers, and #cre executives in commercial, institutional and healthcare facilities.	810
67. (72)	Cundall Cundall are multidisciplinary consulting engineers who operate in the UK, Ireland, Australia, Asia, MENA and Europe.	810
68. (64)	HPM Magazine Heating & Plumbing Monthly is a must-read magazine in the #heating and #plumbing sector. http://t.co/8a0iQ8eozk	809
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	809
70. (65)	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.	809
71. (70)	Green Building Store Products and technical support for Passivhaus and low energy buildings inc @GBSWindowsDoors & MVHR design. FREE Passivhaus & retrofit technical resources.	809
72. (76)	Legrand Products and systems for electrical installations and information networks. Solutions for residential, commercial & industrial buildings. 1-877-295-3472.	808
73. (77)	WYG Group At WYG, we design, develop, and deliver interdisciplinary projects from technical solutions to complex challenges	808
74. (74)	ARCADIS Design & Consultancy for natural and built assets. #Improvingqualityoflife	808
75. (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	807
76. (69)	Installer2019	807
77. (78)	AECB Association for Environment Conscious Building ◦ We work with our members to inspire, develop and share sustainable building practice ◦ https://t.co/QMkVMdgy00	807
78. (80)	Daikin España Perfil corporativo oficial de Daikin España para escuchar, conversar y compartir novedades de la compañía, climatización eficiente y calidad del aire	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	804
80. (90)	Int'l PH Assoc The global network of Passive House professionals and enthusiasts working to promote the Passive House Standard https://t.co/3Xtjz4YbMU	803
81. (79)	LIGHTFAIR LightFair is the world’s largest annual architectural and commercial lighting trade show and conference. May 3-7, 2020 Las Vegas Convention Center, Las Vegas,NV	803
82. (86)	Stephen Gill Changing lives through engineering #Refrigeration #coolingforall #solarcooling #CircularEconomy #mentor @worldrefday #WREFD19 #STEM #neurodiversity #MenAsAllies	803
83. (84)	SOM We are a collective of architects, designers, engineers, and planners building a better future.	803
84. (83)	Hipmagazine The only magazine for plumbing and heating students and apprentices	802
85. (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
86. (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
87. (89)	Mitsubishi Electric Mitsubishi Electric, Living Environment Systems. Energy efficient heating, cooling & ventilation solutions. Retweets not an endorsement.	801
88. (94)	David Frise CEO BESA does M&E in built environment Long suffering Spurs fan. Oh & occasional stand up comedy. Views my own	800
89. (87)	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. (85)	Johnson Controls Sharing company and industry news from Johnson Controls' Building Technologies & Solutions. The global leader in building technology and services	798
91. (103)	Stewart Gilmour CA. FD/CFO. Architecture, R2R, Sustainabilty, Passivhaus, PropTech, Women's Health and HealthTech. MAMIOC. Views my own.	797
92. (93)	SLL The SLL welcomes all those who are interested in any aspect of the world of light, lighting, and its applications.	797
93. (92)	YORK HVAC The official Twitter account for YORK HVAC. Follow us to stay up to date with the latest news.	796
94. (96)	NESEA.org Advancing #sustainable #building & #energy practices in the Northeast's built environment by connecting professionals to ideas, opportunities, and each other.	795
95. (98)	UponorUK Uponor offers innovative plumbing and heating system solutions for all building types, available from your local merchant.	795
96. (88)	PHAM News The technical magazine for plumbing, heating and air movement in the UK	795
97. (91)	Energist UK Your independent specialist for planning, sustainability and building regs. The latest industry news and activity from the team at Energist.	795
98. (100)	ACCA The Air Conditioning Contractors of America is the national association representing the nation's best heating, air conditioning, and refrigeration contractors.	792
99. (99)	Uponor North America Uponor offers sustainable systems for homes and commercial buildings. PEX plumbing, radiant heating/cooling, home fire sprinklers, hydronic piping.	790
100. (102)	Kingspan Insulation #Kingspan #Insulation. Market leading manufacturer of insulation products & systems including Kingspan GreenGuard, OPTIM-R, Kooltherm, Therma & TEK.	790
101. (105)	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.	789
102. (95)	AEE The Association of Energy Engineers is a nonprofit professional energy engineering society of 18,000 members.	789
103. (97)	CIBSEJournal Magazine of the Chartered Institution of Building Services Engineers	789
104. (104)	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.	789
105. (101)	P&FM Magazine PFM is the leading independent voice of the UK facilities management industry	788
106. (107)	Sparks Magazine⚡️ The only magazine for electrical students and apprentices ⚡️ SPARKS Apprentice of the Year kicks off in January! https://t.co/O7AfS6II6U	786
107. (111)	BESA BESA - The Building Engineering Services Association is the UK's leading trade organisation for building engineering services contractors.	786
108. (117)	Parity Projects Award winning experts in home #energyefficiency and #retrofit. Services across the UK for #socialhousing #privatelandlords and #localauthorities.	785
109. (110)	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
110. (106)	Carrier Carrier’s industry-leading brands support safe & sustainable buildings, & protect & preserve the global food supply. #BuildingPossible.	784
111. (109)	Grant UK Leading heating manufacturer supplying award winning condensing oil boilers, renewables, cylinders, heat emitters & controls. Business partner of @BathRugby	784
112. (115)	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!!	784
113. (122)	Chapman Ventilation We do restaurant ventilation. And we do it well.	783
114. (112)	Taco Comfort Welcome to Taco, a third generation, family owned American manufacturer of the highest quality comfort solutions for residential and commercial applications.	782
115. (116)	Ramboll UK Ramboll provides multidisciplinary solutions that serve businesses, governments and communities around the world.	782
116. (108)	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	782
117. (113)	Pegler Yorkshire UK manufacturer of commercial & residential plumbing & heating products. Our social media team tweet about energy saving products & industry-related news	781
118. (121)	Arcadis North America News and views from the North American region of the leading Design & Consultancy firm for natural and built assets. #Arcadis	781
119. (119)	Rinnai UK World's Largest manufacturer of gas appliances, including high efficiency multi purpose water heaters and heating systems	780
120. (118)	World Plumbing Day Celebrate the important role plumbing plays in the health and safety of modern society - every year on March 11th. #WorldPlumbingDay	778
121. (114)	Sentinel We protect domestic & commercial #heating & #hotwater systems by providing best practice solutions & products internationally. Account hours: Mon-Fri 9-5.	778
122. (120)	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.	778
123. (124)	Stroma Building sustainability & compliance! Certification, training, software & consultancy services – for a compliant, more energy-efficient built environment.	777
124. (138)	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
125. (128)	Hoare Lea Engineers of human experiences.	776
126. (130)	CALMAC Use energy more wisely with Thermal Battery cooling featuring Ice Bank #energystorage, for a more sustainable future. Over 1 GW in 60 countries.	776
127. (161)	Dru Crawley #buildings: #tech, #performance, #netzeroenergy, #simulation, #BIM, #climatechange, #data, PhD, father of #EnergyPlus, Bentley Systems, views own	776
128. (127)	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
129. (129)	NG Bailey NG Bailey is the UK’s leading independent engineering and services business with a deserved reputation for excellence. Passion | Integrity | Excellence	774
130. (123)	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.	774
131. (140)	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	773
132. (126)	Setpoint Systems #SystemsIntegrator #BuildingControlSystems #BuildingAutomation #FacilitiesManagement #UL508A #EnergyEfficiency #IoT #CollaborativeSolutionsUnmatchedTraining	772
133. (125)	Philippe Moseley Work at @EU_Commission #EASME on #H2020 #energyefficiency and #renewables in #buildings and urban areas.	772
134. (134)	BoschSecuritySystems Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/J4kYrtVgF4	772
135. (136)	The IES Team Passionate about green building, software simulation tools for architects & engineers and consulting services for design and operation of sustainable buildings	772
136. (141)	HPAC Engineering Content provider for those who design, specify, operate, and maintain mechanical and building-automation systems in non-residential buildings.	771
137. (137)	Danfoss Drives Our portfolio of high-quality, application-optimized AC drives maximizes process performance, saves the most energy and minimizes emissions.	771
138. (132)	Kingspan Panels, UK Welcome to Kingspan Insulated Panels, UK. We’re dedicated to maximising construction efficiency and delivering superior lifetime performance and fire protection	770
139. (142)	Danfoss Cool We keep people, products and the planet cool. Food Retail, Air Conditioning, Industrial & Commercial Refrigeration #HVACR #Turbocor #Cooling #CoolApps	770
140. (131)	Plumbing&Mechanical Follow PM for all the latest breaking news, products, articles, and events in the plumbing, mechanical and hydronic heating industries.	770
141. (133)	OpenSensors.io OpenSensors aggregates data from a variety of sensors for the next generation of smart Building Management Systems.	769
142. (139)	Tyco_IS Tyco is now Johnson Controls, the world leader in, security, fire protection, HVAC, building controls and energy storage.	769
143. (143)	Bosch Security EMEA Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/TNjjIZqIzQ	769
144. (153)	CIPH News Canadian Institute of Plumbing & Heating (CIPH) - the association for plumbing, heating, hydronics, industrial, waterworks and other mechanical products.	769
145. (147)	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. (148)	Dr Penny Sarah Carey	767
147. (146)	CORGI Technical We are dedicated experts committed to gas safety. With nearly 50 years experience providing professional services in industry, offering support and expertise	767
148. (144)	BBP Collaboration of the UK's leading commercial property owners who are working together to improve the sustainability of existing commercial building stock.	767
149. (145)	Worcester Bosch Head to @WorcsBoschCare for homeowner support	766
150. (156)	ACR Journal Essential information for air conditioning and refrigeration professionals. Subscribe FREE online to the magazine or weekly newsletter.	765
151. (159)	Toby Cambray M&E and Building Physics Consultant Engineers, specialising in low energy and sustainable design. Tweets on that and whatever else pops into my head	765
152. (150)	Click Scolmore We are committed to providing a comprehensive range of reliable, high quality and competitively priced electrical and lighting products.	765
153. (149)	Cullinan Studio Cullinan Studio is a cooperative architectural and masterplanning practice engaging with organisations and communities to connect people to nature.	763
154. (165)	Claire Das Bhaumik Building Physicist. Partner at Inkling LLP. Making buildings more comfortable and energy efficient #BuildingPhysics	762
155. (152)	NVent Nuheat nVent NuHeat is the leading brand for premium electric floor #heating in North America.	762
156. (162)	Mark Oliver H+H UK CEO @Colt_Group providing & servicing innovative & sustainable solutions & products for natural ventilation, smoke control, solar shading, louvre & climate	761
157. (151)	Susie Diamond I am a partner at Inkling - a Building Physics consultancy keen to help make buildings more comfortable and energy efficient. #BuildingPhysics	760
158. (154)	CE CE is the distributor and wholesaler of leading HVAC/R brands: Carrier, Bryant, Payne, Gree and TopTech. Customer service and HVAC/R expertise is our focus.	759
159. (178)	Andy SNIPEF membership officer. SNIPEF is the leading trade association for plumbing and heating businesses based in Scotland and Northern Ireland	759
160. (157)	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.	759
161. (155)	Testo UK Test and Measurement experts. Manufacture & Calibrate instruments for HVAC, Refrigeration, Catering, Food Processing & Climate Monitoring	759
162. (163)	RDH Building Science We have a passion for Building Science. Specializing in Building Enclosure Consulting, Construction Project Management, Research, Energy and Forensics.	757
163. (164)	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
164. (182)	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	754
165. (174)	SES Engineering The UK’s leading design-led Mechanical & Electrical (M&E) provider, specialising in the design & installation of building services & infrastructure solutions	754
166. (166)	BSRIA BSRIA's engineering, technical and market research experts provide independent and practical help in design, construction and occupancy of the built environment	753
167. (175)	EHPA The European Heat Pump Association (EHPA) promotes awareness and deployment of #HeatPump technologies in Europe. Join the #HeatPump Community!	753
168. (169)	HVROnlineEditor Interesting and quirky HVAC story tweets and retweets and our daily news feed.	753
169. (171)	Memoori Smart Building Research & Thought Leadership.	753
170. (167)	Electrical Charity Supporting our people through life's challenges. The Electrical Industries Charity is the national charity for the electrical and energy industries.	753
171. (170)	SimonMcGuinness If you build a house, make sure its a certified Passive House.	752
172. (168)	Remeha Tweets from Remeha, the leading supplier of energy-efficient, low NOx commercial heating solutions.	752
173. (176)	Sara MacLean Runs a low carbon PR consultancy. Writes about Building Services, Air Pollution, Sustainability and Construction...ex journalist – drinks lots of tea!	751
174. (172)	PHCPPros Your professional plumbing, heating, cooling and piping community. #PHCNews #PlumbingEngineer #TheWholesaler #Especificar	748
175. (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	747
176. (183)	SNIPEF SNIPEF is the leading trade association for plumbing and heating businesses in Scotland and Northern Ireland	746
177. (158)	Timo Ruohomäki Director, IoT and Data at Forum Virium, the innovation company of City of Helsinki. #smartcity #urbanplatform #kafka #geospatial #CityGML #energy #BEMS #BAS	745
178. (179)	Eric Stromquist I am in to HVAC controls, argentine tango, NLP, and using social media marketing to share information on building automation controls.	745
179. (177)	Smart HVAC Products We introduce new and innovative HVAC products to HVAC professionals. https://t.co/raFWzovYPT	745
180. (173)	Coffman Engineers Civil, structural, mechanical, electrical, fire protection, PMCM, corrosion control, pipeline integrity mgmt, commissioning, & industrial consulting engineers.	743
181. (180)	Waterman Waterman is a multidisciplinary consultancy providing sustainable solutions to the property, infrastructure, energy and environmental markets.	741
182. (181)	Trimble MEP Trimble MEP consists of global employees providing software solutions to #electrical, #mechanical & #plumbing professionals. Part of the @TrimbleBuilding group.	740
183. (186)	APCbySchneiderElecIN We combine Technology with Innovation to create a sustainable future and an energy efficient world. Join us in this journey of change!	739
184. (185)	IAPMO Founded in 1926 #IAPMO is a world-wide nonprofit association focusing comprehensive capabilities on the technical aspects of #plumbing & #mechanical regulations	738
185. (193)	Vital Energi UK’s market leaders for providing district heating, energy generation and energy management solutions. **Account not monitored out of office hours.	737
186. (208)	IOR The Institute of Refrigeration, the UK hub for information on refrigeration, air conditioning and heat pump advancement	735
187. (190)	TroupBywaters+Anders We are high performing, award-winning consulting building services engineers, bringing buildings to life for over 60 years.	734
188. (199)	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	734
189. (187)	Mark Harris Building Technology Director at Kingspan Panels. Chairman of Engineered Panels in Construction. Interested in climate change & sustainable construction.	733
190. (192)	Airflow Developments Airflow Developments Ltd. is globally recognized as long established ventilation specialists who move air efficiently, quietly and with the utmost reliability.	733
191. (188)	ECD Architects Energy Conscious Design is an award winning UK architectural practice committed to design excellence and sustainability. AECB fans and Passivhaus Trust members.	733
192. (196)	ACR News The only dedicated monthly UK trade magazine for the air conditioning and refrigeration industry.	732
193. (189)	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	732
194. (204)	World Refrigeration Day #WorldRefrigerationDay is a global awareness raising campaign of the role of #airconditioning, #refrigeration, #heatpumps #WREFD19 #DíaMundialdelaRefrigeración	732
195. (184)	ProRite M&E contractor, Design, Install & Maintain all District & Communal Heating Systems, HVAC, Controls, Pipework, Thermal Insulation, Water Treatment.	732
196. (201)	CoolMentoring.org STEM Mentoring #coolmentoring #STEM #Mentor #beamentor	731
197. (198)	PassiveHouseCal Passive House California (PHCA)'s mission is to educate the public about energy efficient & healthy buildings. https://t.co/mTI5kIid9q	731
198. (191)	Altecnic Manufacturing accredited #plumbing & #heating equipment, raising industry best practice, making affordable systems safer, sustainable, easier to fit & maintain.	731
199. (221)	SELECT Updates Scotland's trade association for the electrical industry | Our main account with regular news updates	730
200. (195)	TLC Engineering An engineering firm that thinks boldly, listens attentively, and creates passionately.	730
201. (264)	CIBSE West Midlands The Chartered Institution of Building Services Engineers (CIBSE) West Midlands region	729
202. (200)	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
203. (197)	Construction Supplying responsibly sourced steel products and technical expertise to the construction industry including cladding systems, composite floor deck and tubes.	727
204. (194)	Mitton Group Mitton is the name behind 1 of the UK’s leading building services groups providing professional & comprehensive mechanical building service solutions nationwide	726
205. (207)	SALUS Controls SALUS Controls is a lead supplier of energy control solutions focused primarily on the European professional market channel. Think Heating, Think SALUS.	726
206. (212)	Zehnder UK Indoor Climate Solutions: Heating, Cooling & Ventilation.	726
207. (203)	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	725
208. (219)	Hilson Moran Leading multidisciplinary engineering consultancy for the built environment. Creating Environments for Life.	725
209. (247)	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
210. (202)	Green Gateway Green Gateway is Mitsubishi Electric UK, Living Environmental Systems commitment to the environment. Re-tweets are not endorsements.	724
211. (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.	724
212. (206)	ESTA The UK’s Energy Management industry association for demand-side energy management and efficiency including buildings, processes and transport.	724
213. (211)	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.	724
214. (231)	Elementa Consulting Elementa is an award winning building services, low carbon and sustainability consultancy specialising in low energy design.	724
215. (210)	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!	724
216. (215)	Hurley Palmer Flatt HDR | Hurley Palmer Flatt - engineering consultants, delivering design solutions globally. Leaders in mission critical engineering, energy and sustainability.	724
217. (239)	Sara Kassam Head of Sustainability Development at CIBSE (views my own). Fascinated by #buildings and beyond..... mother of two girls #diversity #inclusion #WomeninSTEM	722
218. (213)	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.	722
219. (209)	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 .	721
220. (218)	Glumac Engineers Glumac, a Tetra Tech Company, is a global MEP engineering and commissioning firm focused on delivering Green Buildings That Work.	721
221. (216)	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.	720
222. (217)	CABA CABA is a trade association focused on smart homes and intelligent buildings	720
223. (232)	Bouygues Energies & Services UK Bouygues Energies & Services is a client-focused facilities management, energy performance, and smart city partner.	720
224. (220)	Retrotec We are the world's leading blower door manufacturer, promoting green building through air tightness and enclosure integrity testing equip. & training.	720
225. (223)	Alex Smith Tweeting mostly about the built environment – editor of CIBSE Journal	719
226. (224)	Switch Automation Switch Automation creates technology to bring people and planet to the center of building operations.	719
227. (226)	AndrewsWaterHeaters Andrews Water Heaters is the UK market leader for commercial hot water solutions. Andrews, built to perform.	718
228. (259)	EVORA We make #buildings productive, profitable, and resilient to change. Our market leading #sustainability #data #software, @sierasoftware, enables this.	718
229. (225)	Will R Head of Sustainability @clarion_group Expert in building energy & sustainability, but I never stop learning. My tweets are my own.	717
230. (255)	Senseware #IoTPlatform for rapid #IoT solution architecting. Accelerate time to market with real-time cloud services #DigitalTransformation #Industry40 #digitization #IAQ	717
231. (222)	HVAC-Outlet, LLC http://t.co/5wG14dH98K Bringing professional grade thermostats and air purification to DIYers, HVAC Techs, and Contractors alike.	717
232. (242)	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	716
233. (256)	Steven Hunt Assoc Mechanical & Electrical Consulting Engineers based in #Liverpool - helping create buildings that come alive for 30 years	716
234. (214)	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.	715
235. (229)	Comfort Supply, Inc. Pittsburgh's #HVAC Systems Specialists. 1,200+ #VRF jobs including over 55,000 TONS supplied to date! Ask about getting #CSIpghCERTIFIED.	714
236. (237)	Lindab UK At Lindab, we simplify construction. Because it is human nature to build, we make it easier to build sustainably.	714
237. (227)	Emerson Technicians & Skilled Trades Emerson Commercial and Residential Solutions - Industry channel designed to curate content for our #HVACR and #SkilledTrades audiences