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.

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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.

Curated and Managed by Jim McClelland @SustMeme, the data is published by McClelland Media Ltd, in association with Elemental – an online community for professionals focused on heat, water, air and energy, looking at how we effectively manage these vital elements within the built environment, now and in the future – @elementalexpoUK

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, 28th Oct 2020
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Rank	Player	Index
1. (1)	Schneider Electric We are your digital partner for sustainability and efficiency, ensuring #LifeIsOn, for homes, buildings, data centers, infrastructure and industries.	988
2. (2)	IET The Institution of Engineering and Technology (IET) is a diverse home for engineering and technology across the world.	975
3. (4)	Atkins Official account of Atkins, member of @SNCLavalin, one of the world’s most respected design, engineering and project management consultancies. #PRIDE2020	931
4. (3)	Arup We're a firm of designers, planners, engineers, architects, consultants and technical specialists shaping a better world.	931
5. (5)	AECOM We are the world’s premier infrastructure consultancy, taking on the most complex challenges and pioneering solutions that push the limits of what’s possible.	919
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	915
7. (7)	Janet T Beckett Chartered Engineer, HVAC & Low Carbon building designer, I work in construction. Democratic Socialist.	914
8. (8)	PHPI Magazine The UK’s biggest heating & plumbing magazine brand. RT/like = bkmrk. Home of #InstallOfFame. Sign up for digital copies at https://t.co/Ca30YHklyN	909
9. (9)	SiemensUSA Unlocking the potential of digital transformation to positively impact society. #SiemensUSA	908
10. (10)	The IMechE Team We are the Institution of Mechanical Engineers (IMechE). We are raising the profile of mechanical engineering.	900
11. (11)	IWFM The Institute of Workplace and Facilities Management (IWFM) is the professional body for workplace and facilities practitioners.	898
12. (12)	CIBSE Chartered Institution of Building Services Engineers: dedicated to improving building performance through engineering excellence.	893
13. (13)	Mitie The UK’s leading Facilities Management business delivering the exceptional, every day Social media team here 8.30am - 5:30pm, Mon-Fri.	889
14. (14)	Daikin India Daikin India is one of the leading manufacturers of air-conditioners in the commercial and residential segment today. You can talk to us here. 🙂	888
15. (16)	Mitsubishi Electric Experience total home comfort while conserving energy and filtering allergens — all at the touch of a button. #MakeYourselfComfortable #smartHVAC	887
16. (15)	Installer Magazine Installer is essential reading for heating, plumbing and renewable professionals.	887
17. (18)	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	886
18. (17)	Honeywell At #Honeywell, we're transforming the way the world works. #futureshaper	886
19. (19)	Passivhaus Trust Leading the way in the UK for adoption of the #Passivhaus standard. UK affiliate of @the_iPHA. https://t.co/yCIs7NYakg #UKPHC20	875
20. (20)	Nathan James Van Gambling BA Hon. Plumbing/Heating Lecturer. Hosts #betatalk @betateachpod energy podcast sponsored by @EnergySysCat @A_L_T member Training consultant #trees #nature #solarheat	872
21. (21)	Baxi High efficiency #boilers manufactured in UK, with national #aftersales from Baxi Customer Support & Baxi Genuine Parts Tel 0330 678 0917 Mon-Fri 8-6 Sat 8.30-2	866
22. (23)	IFMA Facility managers improve business and our lives. We help them make it possible.	866
23. (22)	Saint-Gobain Designs, manufactures & distributes materials & solutions which are key ingredients in the wellbeing of each of us and the future of all.	864
24. (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.	857
25. (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	855
26. (26)	AHR Expo Updates from the world's largest event for HVACR professionals. AHR Expo will head to Chicago in 2021! #AHRexpo #HVACR #HVAC	851
27. (27)	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.	847
28. (28)	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.	845
29. (29)	Leviton Leading manufacturer of electrical wiring devices, lighting controls, network solutions, electric vehicle supply equipment & automation. Join us @LevitonCareers	843
30. (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.	841
31. (30)	Simon Owen Built environment recruiter & #cycling obsessive. Taking a break from Twitter. May send odd tweet, not logging in often.	840
32. (32)	WSP In The UK WSP is one of the world’s leading engineering professional services consulting firms. Follow us for news and updates about all things WSP UK #WeAreWSP	838
33. (34)	Buro Happold We're a world-class global practice of engineers, consultants & advisers - a community of experts creating transformative outcomes for clients & communities.	837
34. (35)	Mott MacDonald Group Opening opportunities with connected thinking | Follow our staff and find out about career opportunities @MottMacLife | For early careers follow @MottMacFuture.	837
35. (33)	WSP One of the world's leading engineering professional services consulting firms, bringing together talented people from around the globe. (Suivez-nous: @WSP_fr)	836
36. (36)	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	834
37. (37)	Passive House Plus Award-winning green building mag. Focus: evidence-based approaches for buildings to mitigate/adapt to climate change. IRL & UK editions	832
38. (44)	Nick Grant Passivhaus Consultant excited by Sustainable building design. Technical Director of UK Passivhaus Trust but views are mine or stolen.	832
39. (38)	Pro Electrician The magazine for the electrical trade. News, tech updates, product reviews, competitions. Available for free at electrical wholesale trade counters nationwide.	831
40. (39)	BDP BDP is a major international, interdisciplinary practice of architects, designers, engineers and urbanists.	830
41. (40)	Lux Magazine Your independent guide to lighting.	830
42. (41)	Facilties Show Facilities Show is the world's largest FM event, supported by IWFM. #FAC2021 #FacMan	829
43. (43)	Electronic Specifier Electronic Specifier features the latest product & industry news, helping those in the electronics industry make informed choices.	828
44. (45)	ECA ECA is the UK’s leading trade association for electrotechnical and engineering services organisations. You can also follow our industry magazine @ECATodayonline	826
45. (47)	Energyinstitute Bringing together expertise for urgent global challenges. President @SteveJHolliday, CEO @KinghamEI Home of @EIToolbox @SafetyOnTweets @gplusglobalofw @_PfWomen	826
46. (49)	Kirsty Hammond Specifier Review – The building product news resource for specifiers. Architecture, design & innovation, news & views from the built environment.	824
47. (46)	P R Hull 34 years in Commercial Plumbing,Heating & Gas Industry Passionate about energy-saving and Maintaining high standards #arefluekiddingme #GSSH #Smallstepstogether	824
48. (48)	HVP Magazine The leading magazine for the heating, ventilating, and plumbing industry. Likes and retweets are not an endorsement. Contact us at hvp@mail.hgluk.net.	823
49. (53)	WELLcertified At IWBI we believe that buildings should be developed with people's health and wellness at the center of design. #WELLBuildingStandard #weareWELL	822
50. (42)	Stephen Gill Changing lives through engineering @Worldrefday Secretariat #urbantrees #CircularEconomy #worldrefrigerationday #neurodiversity #MenAsAllies #DyslexiaEngDay	821
51. (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
52. (54)	Knauf Insulation UK Knauf Insulation is the UK’s leading insulation manufacturer creating energy efficient systems for buildings.	820
53. (52)	Wolseley UK A handy source of news and views for the trade. This page is monitored 9:00 - 17:30 (Monday - Friday).	820
54. (51)	BUILD UP The European portal for #EnergyEfficiency in #buildings. #EPBD #nZEB An initiative of the @EU_Commission. Disclaimer: https://t.co/RUZW43UttN	820
55. (55)	Danfoss Group We are engineering solutions that allows the world to use resources in smarter ways & driving the #SustainableTransformation of tomorrow.	819
56. (new)	Buildings Smarter #facilities management for #buildings, from #HVAC, #energy management and #roofing to #ADA compliance, #IoT, #lighting and #wellness. #facilitiesmgmt	817
57. (57)	TheCIPHE The professional and voluntary regulatory body for the plumbing and heating engineering industry.	817
58. (56)	ASHRAEnews Shaping Tomorrow's Built Environment Today	817
59. (62)	EmersonComRes Comfortable, controllable indoor environments. Fresh, safe food throughout the cold chain. Energy-efficient technology to build sustainable infrastructures.	816
60. (59)	Geberit For up to date news on Geberit products, innovations and real installations from installers.	816
61. (58)	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.	816
62. (66)	EnviroVent UK’s leading #manufacturer & supplier of energy efficient & sustainable #ventilation products.	815
63. (63)	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.	815
64. (61)	Carrier HVAC A world leader in residential and commercial high-tech heating, air-conditioning & ventilation solutions. Part of @Carrier.	814
65. (64)	Ecological Building At the forefront of airtight and windtight building products and natural insulations for over a decade.	814
66. (60)	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
67. (65)	Green Building Store Products and support for Passivhaus and low energy buildings. Working together with @Enhabitfeed for a whole house solution.	813
68. (67)	Siemens Buildings Follow us @SiemensInfra to find out how we're enhancing the way we live & work by intelligently connecting energy systems, buildings & industries.	813
69. (71)	AECB Association for Environment Conscious Building ◦ We work with our members to inspire, develop and share sustainable building practice ◦ https://t.co/QMkVMdgy00	812
70. (68)	HPM Magazine Heating & Plumbing Monthly is a must-read magazine in the #heating and #plumbing sector. http://t.co/8a0iQ8eozk	810
71. (77)	Int'l PH Assoc The global network of Passive House professionals and enthusiasts working to promote the Passive House Standard https://t.co/3Xtjz4YbMU	809
72. (73)	Building Operating Management Leading magazine for #buildingowners, #facilitymanagers, and #cre executives in commercial, institutional and healthcare facilities.	808
73. (69)	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. (74)	Cundall Cundall are multidisciplinary consulting engineers who operate in the UK, Ireland, Australia, Asia, MENA and Europe.	808
75. (85)	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. (76)	Legrand Products and systems for electrical installations and information networks. Solutions for residential, commercial & industrial buildings. 1-877-295-3472.	807
77. (75)	Hipmagazine	807
78. (80)	SOM We are a collective of architects, designers, engineers, and planners building a better future.	806
79. (81)	WYG Group At WYG, we design, develop, and deliver interdisciplinary projects from technical solutions to complex challenges	806
80. (79)	LIGHTFAIR Trade show. Conference. Networking. Let's talk lighting. See you in New York for LightFair 2021.	805
81. (72)	Installer2019	805
82. (82)	Daikin España Perfil corporativo oficial de Daikin España para escuchar, conversar y compartir novedades de la compañía, climatización eficiente y calidad del aire	805
83. (70)	Sparks Magazine⚡️	804
84. (84)	Mitsubishi Electric Mitsubishi Electric, Living Environment Systems. Energy efficient heating, cooling & ventilation solutions. Retweets not an endorsement.	804
85. (86)	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	803
86. (92)	BESA BESA - The Building Engineering Services Association is the UK's leading trade organisation for building engineering services contractors.	801
87. (83)	Tomorrow's FM Tomorrow's FM is your online Facilities Management magazine. Email: ryan@opusbm.co.uk Editor: @Ryanthll	801
88. (88)	David Frise CEO BESA does M&E in built environment Long suffering Spurs fan. Oh & occasional stand up comedy. Views my own	801
89. (89)	PHAM News The technical magazine for plumbing, heating and air movement in the UK	799
90. (91)	Johnson Controls Sharing company and industry news from Johnson Controls' Building Technologies & Solutions. The global leader in building technology and services	799
91. (87)	ROCKWOOL We are committed to enriching the lives of everyone who comes into contact with our solutions. Tweets from ROCKWOOL UK Marketing Team.	799
92. (78)	Stewart Gilmour CA. FD/CFO. Architecture, R2R, Sustainabilty, Passivhaus, PropTech, Women's Health and HealthTech. MAMIOC. Views my own.	799
93. (99)	ACCA The Air Conditioning Contractors of America is the national association representing the nation's best heating, air conditioning, and refrigeration contractors.	797
94. (90)	NESEA.org Advancing #sustainable #building & #energy practices in the Northeast's built environment by connecting professionals to ideas, opportunities, and each other.	796
95. (95)	Heat-Engineer.Com Built By Engineers For Engineers, this is the worlds first professional heat loss calculation & specification software. #WastageCrisis #BeaPro	796
96. (102)	YORK HVAC The official Twitter account for YORK HVAC. Follow us to stay up to date with the latest news.	795
97. (93)	SLL The SLL welcomes all those who are interested in any aspect of the world of light, lighting, and its applications.	795
98. (94)	Energist UK Your independent specialist for planning, sustainability and building regs. The latest industry news and activity from the team at Energist.	794
99. (96)	Grant UK Leading heating manufacturer supplying award winning condensing oil boilers, renewables, cylinders, heat emitters & controls.	794
100. (100)	UponorUK Uponor offers innovative plumbing and heating system solutions for all building types, available from your local merchant.	794
101. (98)	AEE The Association of Energy Engineers is a nonprofit professional energy engineering society of 18,000 members.	794
102. (new)	Asmag.com https://t.co/eHQNoQQZBR provides the latest industry news & guides related to security, smart & safe city, building & home automation, mobility, and IIoT.	794
103. (105)	Uponor North America Uponor offers sustainable systems for homes and commercial buildings. PEX plumbing, radiant heating/cooling, home fire sprinklers, hydronic piping.	793
104. (106)	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
105. (101)	Carrier Carrier Global Corporation is a leading global provider of healthy, safe and sustainable building and cold chain solutions. We all #_belongAtCarrier.	792
106. (104)	CIBSEJournal Magazine of the Chartered Institution of Building Services Engineers	792
107. (97)	P&FM Magazine PFM is the leading independent voice of the UK facilities management industry	791
108. (108)	Kingspan Insulation #Kingspan #Insulation. Market leading manufacturer of insulation products & systems including Kingspan GreenGuard, OPTIM-R, Kooltherm, Therma & TEK.	790
109. (107)	New Buildings Inst. A driving force for better energy performance in buildings...NBI assesses technologies, promotes design approaches, and helps guide policies and programs	789
110. (109)	APHC We're a membership body for plumbing and heating companies. We represent the interests of our members and provide them with technical and commercial support.	787
111. (115)	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	786
112. (114)	Philippe Moseley Work at @EU_Commission #EASME on #H2020 #energyefficiency and #renewables in #buildings and urban areas.	785
113. (113)	Pegler Yorkshire UK manufacturer of commercial & residential plumbing & heating products. Our social media team tweet about energy saving products & industry-related news	784
114. (110)	Parity Projects Award winning experts in home #energyefficiency and #retrofit. Services across the UK for #socialhousing #privatelandlords and #localauthorities.	783
115. (111)	Ramboll UK Ramboll provides multidisciplinary solutions that serve businesses, governments and communities around the world. It's our 75th anniversary https://t.co/gC7iXxUaJs	782
116. (112)	Rinnai UK World's Largest manufacturer of gas appliances, including high efficiency multi purpose water heaters and heating systems	782
117. (123)	Dru Crawley #buildings: #tech, #performance, #netzeroenergy, #simulation, #BIM, #climatechange, #data, PhD, father of #EnergyPlus, Bentley Systems, views own	781
118. (120)	NG Bailey NG Bailey is the UK’s leading independent engineering and services business with a deserved reputation for excellence. Passion | Integrity | Excellence	781
119. (103)	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	781
120. (116)	Taco Comfort Welcome to Taco, a third generation, family owned American manufacturer of the highest quality comfort solutions for residential and commercial applications.	781
121. (117)	Sentinel Global water treatment experts for 30+ years; helping you clean, protect & maintain heating and hot water systems	780
122. (118)	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.	780
123. (121)	World Plumbing Day Celebrate the important role plumbing plays in the health and safety of modern society - every year on March 11th. #WorldPlumbingDay	779
124. (130)	Hoare Lea Engineers of human experiences.	779
125. (119)	Chapman Ventilation We do restaurant ventilation. And we do it well.	778
126. (129)	OFTEC Represents liquid fuel heating industry in UK/Ireland. Campaigning for affordable, green #LiquidFuelFuture | Competent Person Scheme | TrustMark | MCS | PAS2030	777
127. (127)	Stroma Building sustainability & compliance! Certification, training, software & consultancy services – for a compliant, more energy-efficient built environment.	777
128. (128)	Setpoint Systems #SystemsIntegrator #BuildingControlSystems #BuildingAutomation #FacilitiesManagement #UL508A #EnergyEfficiency #IoT #CollaborativeSolutionsUnmatchedTraining	776
129. (126)	Danfoss Drives Our portfolio of high-quality, application-optimized AC drives maximizes process performance, saves the most energy and minimizes emissions.	776
130. (122)	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	775
131. (137)	CALMAC Use energy more wisely with Thermal Battery cooling featuring Ice Bank #energystorage, for a more sustainable future. Over 1 GW in 60 countries.	775
132. (136)	BoschSecuritySystems Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/J4kYrtVgF4	774
133. (142)	OpenSensors.io OpenSensors aggregates data from a variety of sensors for the next generation of smart Building Management Systems.	773
134. (124)	H&V News Voice of HVAC for 60+ years! We run the H&V News Awards. Register for mags/newsletters at https://t.co/PtHV4lreNH.Join our 9000-member LinkedIn Group. Tweets from Ed team	773
135. (134)	Click Scolmore Scolmore - Wiring accessories manufacturer ⚡	772
136. (135)	Plumbing&Mechanical Follow PM for all the latest breaking news, products, articles, and events in the plumbing, mechanical and hydronic heating industries.	772
137. (133)	The IES Team Passionate about green building, software simulation tools for architects & engineers and consulting services for design and operation of sustainable buildings	772
138. (138)	Cullinan Studio Collaborative architects and masterplanners committed to restoring the connection between people and nature.	772
139. (149)	Tyco_IS Tyco is now Johnson Controls, the world leader in, security, fire protection, HVAC, building controls and energy storage.	771
140. (132)	Danfoss Cool We keep people, products and the planet cool. Food Retail, Air Conditioning, Industrial & Commercial Refrigeration #HVACR #Turbocor #Cooling #CoolingUnitedLive	771
141. (125)	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	770
142. (143)	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
143. (131)	HPAC Engineering Content provider for those who design, specify, operate, and maintain mechanical and building-automation systems in non-residential buildings.	770
144. (new)	Loxone UK Loxone is a complete building automation system with intuitive control - suitable for smart homes, commercial premises and custom applications.	769
145. (144)	Bosch Security EMEA Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/dbSpjxyDUH	769
146. (140)	Worcester Bosch Head to @WorcsBoschCare for homeowner support	768
147. (139)	World Refrigeration Day #WorldRefrigerationDay: a global awareness raising campaign of the role of #airconditioning, #refrigeration, #heatpumps #WREFD20 #ColdChain4Life #coolingmatters	768
148. (141)	Susie Diamond I am a partner at Inkling - a Building Physics consultancy keen to help make buildings more comfortable and energy efficient. #BuildingPhysics	767
149. (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	766
150. (155)	CIPH News Canadian Institute of Plumbing & Heating (CIPH) - the association for plumbing, heating, hydronics, industrial, waterworks and other mechanical products.	766
151. (145)	ACR Journal Essential information for air conditioning and refrigeration professionals. Subscribe FREE online to the magazine or weekly newsletter.	765
152. (147)	BBP Collaboration of the UK's leading commercial property owners who are working together to improve the sustainability of existing commercial building stock.	765
153. (171)	Memoori Smart Building Research & Thought Leadership.	764
154. (148)	Dr Penny Sarah Carey	763
155. (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.	763
156. (154)	Kensa Heat Pumps The UK's only manufacturer & number one supplier of ground source heat pumps. For large installations visit Kensa Contracting: @KensaContracts	763
157. (160)	RDH Building Science We have a passion for Building Science. Specializing in Building Enclosure Consulting, Construction Project Management, Research, Energy and Forensics.	762
158. (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.	762
159. (152)	Testo UK Test and Measurement experts. Manufacture & Calibrate instruments for HVAC, Refrigeration, Catering, Food Processing & Climate Monitoring	761
160. (169)	Toby Cambray PhD student (Hydrophobic Masonry Treatments), co-founder @greengaugebec.	761
161. (151)	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	759
162. (159)	SES Engineering The UK’s leading design-led Mechanical & Electrical (M&E) provider, specialising in the design & installation of building services & infrastructure solutions	759
163. (167)	EHPA The European Heat Pump Association (EHPA) promotes awareness and deployment of #HeatPump technologies in Europe. Join the #HeatPump Community!	758
164. (162)	Mark Oliver H+H UK CEO @Colt_Group providing & servicing innovative & sustainable solutions & products for natural ventilation, smoke control, solar shading, louvre & climate	757
165. (163)	Electrical Charity Supporting our people through life's challenges. The Electrical Industries Charity is the national charity for the electrical and energy industries.	757
166. (150)	HVROnlineEditor Interesting and quirky HVAC story tweets and retweets and our daily news feed.	757
167. (157)	NVent Nuheat nVent NuHeat is the leading brand for premium electric floor #heating in North America.	755
168. (158)	BSRIA BSRIA's engineering, technical and market research experts provide independent and practical help in design, construction and occupancy of the built environment	754
169. (165)	Remeha Tweets from Remeha, the leading supplier of energy-efficient, low NOx commercial heating solutions.	754
170. (168)	SimonMcGuinness If you build a house, make sure its a certified Passive House.	754
171. (166)	PHCPPros Your professional plumbing, heating, cooling and piping community. #PHCNews #PlumbingEngineer #TheWholesaler #Especificar	753
172. (153)	Andy SNIPEF membership officer. SNIPEF is the leading trade association for plumbing and heating businesses based in Scotland and Northern Ireland ⛳️	752
173. (177)	Claire Das Bhaumik Building Physicist. Partner at Inkling LLP. Using physics to make buildings more comfortable and energy efficient #BuildingPhysics	750
174. (172)	Airflow Developments Airflow Developments Ltd. is globally recognized as long established ventilation specialists who move air efficiently, quietly and with the utmost reliability.	749
175. (176)	IAPMO Founded in 1926 #IAPMO is a world-wide nonprofit association focusing comprehensive capabilities on the technical aspects of #plumbing & #mechanical regulations	748
176. (183)	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. (185)	Altecnic Manufacturing accredited #plumbing & #heating equipment, raising industry best practice, making affordable systems safer, sustainable, easier to fit & maintain.	747
178. (181)	Eric Stromquist I am in to HVAC controls, argentine tango, NLP, and using social media marketing to share information on building automation controls.	746
179. (178)	Waterman Waterman is a multidisciplinary consultancy providing sustainable solutions to the property, infrastructure, energy and environmental markets.	746
180. (184)	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.	746
181. (175)	SELECT Updates Scotland's largest trade association, serving the electrical industry since 1900 | Our main account with regular news updates | Helping with COVID-19 advice	746
182. (164)	SNIPEF Scotland and Northern Ireland's Trade Association for the Plumbing and Heating Industry	746
183. (174)	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
184. (173)	Mercury Engineering Mercury is a European contractor. We build and manage complex engineering projects that reimagine how people work & live in the built environment.	745
185. (186)	Smart HVAC Products We introduce new and innovative HVAC products to HVAC professionals. https://t.co/raFWzovYPT	745
186. (180)	Coffman Engineers Civil, structural, mechanical, electrical, fire protection, PMCM, corrosion control, pipeline integrity mgmt, commissioning, & industrial consulting engineers.	744
187. (187)	Trimble MEP Trimble MEP consists of global employees providing software solutions to #electrical, #mechanical & #plumbing professionals. Part of the @TrimbleBuilding group.	743
188. (170)	IOR The Institute of Refrigeration, the UK hub for information on refrigeration, air conditioning and heat pump advancement	743
189. (189)	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	741
190. (188)	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
191. (182)	ACR News The only dedicated monthly UK trade magazine for the air conditioning and refrigeration industry.	739
192. (191)	ECD Architects ECD is an award winning UK architectural practice committed to design excellence and sustainability. AECB fans and Passivhaus Trust members.	739
193. (194)	ESTA The UK’s primary association for demand-side energy management and efficiency including buildings, processes and transport. Making Energy Efficiency Happen	737
194. (192)	TroupBywaters+Anders We are high performing, award-winning consulting building services engineers, bringing buildings to life for over 60 years.	737
195. (190)	TLC Engineering An engineering firm that thinks boldly, listens attentively, and creates passionately.	737
196. (179)	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	736
197. (195)	APCbySchneiderElecIN We combine Technology with Innovation to create a sustainable future and an energy efficient world. Join us in this journey of change!	736
198. (203)	Mark Harris Divisional Technical Director at Kingspan Panels. Chairman of Engineered Panels in Construction. Interested in climate change & sustainable construction.	733
199. (193)	Vital Energi UK’s market leaders for providing district heating, energy generation and energy management solutions. **Account not monitored out of office hours.	733
200. (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	733
201. (206)	CoolMentoring.org STEM Mentoring #coolmentoring #STEM #Mentor #beamentor	732
202. (205)	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.	732
203. (199)	Construction Supplying responsibly sourced steel products and technical expertise to the construction industry including cladding systems, composite floor deck and tubes.	732
204. (197)	Zehnder UK Indoor Climate Solutions: Heating, Cooling & Ventilation.	730
205. (210)	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.	730
206. (209)	SALUS Controls SALUS Controls is a lead supplier of energy control solutions focused primarily on the European professional market channel. Think Heating, Think SALUS.	729
207. (207)	75F We use smart sensors and controls to make commercial buildings more efficient, healthy and comfortable than ever before.	728
208. (214)	Hilson Moran Leading multidisciplinary engineering consultancy for the built environment. Creating Environments for Life.	728
209. (211)	Sara Kassam #Sustainability Lead at the V&A (views my own) | #BuiltEnvironment | #Diversity #Inclusion | #WomeninSTEM | #MotherofDaughters	727
210. (201)	PassiveHouseCal Passive House California (PHCA)'s mission is to educate the public about energy efficient & healthy buildings. https://t.co/mTI5kIid9q	727
211. (208)	Green Gateway Green Gateway is Mitsubishi Electric UK, Living Environmental Systems commitment to the environment. Re-tweets are not endorsements.	727
212. (200)	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 .	724
213. (218)	Glumac Engineers Glumac, a Tetra Tech Company, is a global MEP engineering and commissioning firm focused on delivering Green Buildings That Work.	723
214. (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	723
215. (230)	Switch Automation Switch Automation creates technology to bring people and planet to the center of building operations.	723
216. (198)	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.	723
217. (225)	Bouygues Energies & Services UK Bouygues Energies & Services is a client-focused facilities management, energy performance, and smart city partner.	723
218. (212)	Danfoss Cool US Engineering sustainable solutions to improve our daily lives. #Refrigeration #HVAC #IndustrialRefrigeration #FoodRetail	722
219. (224)	Atelier Ten As environmental design consultants and building services engineers we are committed to high-performance and sustainable design within the built environment.	722
220. (222)	CABA CABA is a trade association focused on smart homes and intelligent buildings	722
221. (215)	Alex Smith Tweeting mostly about the built environment – editor of CIBSE Journal	722
222. (229)	CIBSE West Midlands The Chartered Institution of Building Services Engineers (CIBSE) West Midlands region	721
223. (228)	AndrewsWaterHeaters Andrews Water Heaters is the UK market leader for commercial hot water solutions. Andrews, built to perform.	721
224. (249)	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.	721
225. (223)	Betatalk "Most important podcast in UK energy" (ex special advisor to the Energy Minister) Discussing renewables with host @betateach #solarheat #renewables	721
226. (240)	Comfort Supply, Inc. Pittsburgh's #HVAC Systems Specialists. 1,200+ #VRF jobs including over 55,000 TONS supplied to date! Ask about getting #CSIpghCERTIFIED.	720
227. (204)	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!	720
228. (231)	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.	720
229. (238)	Retrotec We are the world's leading blower door manufacturer, promoting green building through air tightness and enclosure integrity testing equip. & training.	719
230. (233)	Bosch Security AP Supplier of security, safety, communications products/systems & solutions for building security/automation & energy efficiency. Imprint https://t.co/bFSHPUZSF6	718
231. (227)	Will R Head of Sustainability @clarion_group Expert in building energy & sustainability, but I never stop learning. My tweets are my own.	718
232. (226)	Emerson Technicians & Skilled Trades Emerson Commercial and Residential Solutions - Industry channel designed to curate content for our #HVACR and #SkilledTrades audiences	718
233. (235)	Jackson Systems, LLC Award-winning, innovative HVAC controls, direct-to-contractor. Like us on Facebook, too! https://t.co/WK4xHRvJ0C	718
234. (216)	HVAC-Outlet, LLC http://t.co/5wG14dH98K Bringing professional grade thermostats and air purification to DIYers, HVAC Techs, and Contractors alike.	717
235. (248)	UrbanEnergy Research Heriot-Watt Urban Energy Research Group. Energy in buildings, demand modelling, energy systems and policy #cesi #cedri #ReflexOrkney. Contact: Dr David Jenkins	717
236. (196)	Hurley Palmer Flatt HDR | Hurley Palmer Flatt - engineering consultants, delivering design solutions globally. Leaders in mission critical engineering, energy and sustainability.	716
237. (221)	Titon Manufacturer and supplier of MVHR systems, trickle ventilators and window and door hardware. Office hours 8.15am - 4.45pm Monday to Friday.	716
238. (257)	KMC Controls KMC Controls provides IoT and Automation solutions to increase operational efficiency, optimize energy usage, and make spaces more comfort and safe.	715
239. (245)	Luxaire HVAC The official Twitter account for Luxaire HVAC. Follow us to stay up to date with the latest news.	714
240. (243)	Elementa Consulting | imagine | perform | accelerate | sustain | For global updates follow @DeepGreenEng	713
241. (250)	IPHM.info The International Passive House Magazine (iPHM) is providing you always up-to-date information and collecting all the relevant articles 4 you.	713
242. (244)	Tridium Inc. The global leader in open platforms, application software frameworks, automation infrastructure, energy management & device-to-enterprise integration.	713
243. (241)	CPW East Mids Environmental Building Services Consultancy. Making buildings feel good. We are the East Midlands offices of CouchPerryWilkes.	713
244. (236)	H2oBuilding Services We are The Water Audit Experts the UK leading Water Cost Reduction Experts Reducing business water costs-Water Audits-Water Leak Detection- Nationwide	712
245. (254)	Arthur McKay UK Building Support Services company delivering Mechanical & Electrical, Fire Protection, Networks and Facilities Management services with YOU at the centre.	711
246. (255)	Building Services Building Services helps you make better decisions about who to work with and what products to use for your projects. Newsletters: http://t.co/TdhNq7G21c	711
247. (220)	Ref_Industry Follow refrigeration daily news. Send your news info@refindustry.com. Join to on the Global Refrigeration Directory. Know more on our website - "How to add".	711
248. (247)	Simon Jones Aereco, Ventilation, IAQ, and all things construction. Ireland's Representative on IEA Annex 5 (AIVC) Air Infiltration and Ventilation Center.	711
249. (253)	Mariana Pickering CEO + Co-Founder @EmuBldgScience - experts in #buildingscience, advanced construction technology, and #passivehouse design. Remember to #RunWildBuildPassive !	710
250. (271)	Trend Controls Trend is a major international supplier of Building Energy Management Systems (BEMS) with a worldwide distribution and support network covering 50+ countries.	710
251. (265)	Calgary Hydronics Poking boilers with sharp objects..	710
252. (219)	Ecolution Consulting Leaders in sustainability and green building	710
253. (239)	Lindab UK At Lindab, we simplify construction. Because it is human nature to build, we make it easier to build sustainably.	710
254. (256)	Steven Hunt Assoc Mechanical & Electrical Consulting Engineers based in #Liverpool - helping create buildings that come alive for 30 years	710
255. (259)	Digital Energy Solutions Energy Solutions for all Businesses - Complete #solutions for #Metering #Monitoring #CRC #ESOS #ISO50001 #compliance #energy #energyefficiency #savings	709
256. (242)	Boiler-M8 The official account for Boiler-M8. Manufacturer of high quality magnetic heating system filters, circulating pumps and air-separators.	709
257. (237)	BEAMA BEAMA works with manufacturers of vital products, technologies and serv