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.

The Leaderboard ranks Players on the basis of scores that measure interactions and influence across social media, with the metrics provided predominantly via leading independent platform Kred, plus an additional custom element.

To nominate a person or organisation for potential inclusion on this ranking, please simply Tweet the Twitter Username of the nominee to @SustMemeTop500, using the hashtag #Top500ADDBuildingServices.

To view other sectors for which SustMeme rankings are published please return to the main Top 500 menu. For all news of Top 500 releases, updates and peer group notifications, please Follow dedicated Twitter feed: @SustMemeTop500.

To access and learn more about the full range of Top 500 Player options, please see the SustMeme User Guide, plus visit the Building Services Top 500 host platform direct.

SustMeme Building Services

4:00am, 20th Mar 2019
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Rank	Player	Index
1. (1)	Schneider Electric Schneider Electric is leading the Digital Transformation of Energy Management and Automation in Homes, Buildings, Data Centers, Infrastructure and Industries.	984
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	965
3. (3)	Atkins Official account of Atkins, member of @SNCLavalin, one of the world’s most respected design, engineering and project management consultancies.	928
4. (4)	Arup Designers, planners, engineers, consultants & technical specialists shaping a better world.	919
5. (5)	AECOM AECOM is a global network of design, engineering, construction and management professionals partnering with clients to imagine and deliver a better world.	903
6. (6)	IWFM The Institute of Workplace and Facilities Management (IWFM) is the professional body for workplace and facilities practitioners.	891
7. (7)	SiemensUSA Unlocking the potential of digital transformation to positively impact society. #SiemensUSA	889
8. (8)	The IMechE Team We're the Institution of Mechanical Engineers (IMechE), and we're raising the profile of mechanical engineering.	883
9. (9)	Mitsubishi Electric Experience total home comfort while conserving energy and filtering allergens — all at the touch of a button. #MakeComfortPersonal	882
10. (10)	CIBSE Chartered Institution of Building Services Engineers: dedicated to improving building performance through engineering excellence	882
11. (12)	Vaillant UK Vaillant is one of Europe's largest heating technology manufacturers. We monitor this page during office hours. For customer service, please call 0344 736 0049	881
12. (11)	Janet T Beckett Chartered Engineer, HVAC & Low Carbon building designer, I work in construction. Democratic Socialist.	879
13. (13)	Mitie The UK’s leading Facilities Management business delivering the exceptional, every day: #ConnectedWorkspace - Social media team here 9am - 5:30pm, Mon-Fri.	875
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. 🙂	873
15. (15)	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	864
16. (17)	IFMA Facility managers improve business and our lives. We help them make it possible.	857
17. (16)	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.	856
18. (25)	Leviton Leading manufacturer of electrical wiring devices, lighting controls, network solutions, electric vehicle supply equipment & automation. Join us @LevitonCareers	844
19. (18)	Honeywell Keeping you up to date with what’s going on at Honeywell.	841
20. (29)	PHPI Magazine The UK’s biggest heating and plumbing magazine. Likes/RTs ≠ endorsements.	841
21. (23)	Facilitate Magazine Monthly in print and daily online, Facilitate is the magazine of @IWFM_UK – the Institute of Workplace and Facilities Management. Visit @IWFM_Jobs for careers.	840
22. (22)	Installer Magazine Installer is essential reading for heating, plumbing and renewable professionals.	840
23. (20)	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.	839
24. (24)	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	839
25. (21)	Passivhaus Trust Leading the way in the UK for adoption of the #Passivhaus standard. UK affiliate of @the_iPHA.	839
26. (19)	Arcadis UK Arcadis is the leading global natural and built asset design and consultancy firm. LinkedIn: Arcadis United Kingdom	838
27. (26)	Simon Owen Built environment recruiter, @CIBSEYrksAwards organiser, @CIBSE Yorkshire region committee member and cycling obsessive.	837
28. (36)	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	834
29. (27)	WSP In The UK We are WSP in the UK – leading professional services consultancy. We provide news & updates about all things WSP. #WeAreWSP	833
30. (28)	Official NICEIC News, views and information from NICEIC, the UK's leading registration body for the electrical contracting industry. Always choose an NICEIC contractor.	833
31. (31)	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.	833
32. (32)	Mott MacDonald Group Opening opportunities with connected thinking. We search out the connections others fail to make to solve the world’s most intricate challenges. @MottMacLife	829
33. (30)	WSP WSP is one of the world’s leading professional services firms. L'une des plus importantes sociétés de services professionnels du monde.	829
34. (38)	Lux Magazine Your independent guide to lighting.	828
35. (39)	Facilties Show Facilities Show is the UK's largest FM event, celebrating & supporting the industry in partnership with IWFM. #FAC19 #FacMan	827
36. (35)	Passive House Plus Award-winning green building mag. Focus: evidence-based approaches for buildings to mitigate/adapt to climate change. IRL & UK editions	827
37. (33)	Buro Happold We're making the vision viable helping create amazing #buildings and #cities around the world	827
38. (37)	FMJ FMJ is the leading resource for the FM sector, providing industry-specific intelligence for the public and private sectors. #facman See jobs at @fmjobfinder	826
39. (40)	Johnson Controls Sharing news from Johnson Controls, a global diversified technology and industrial leader serving customers in more than 150 countries.	825
40. (80)	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.	825
41. (42)	Kirsty Hammond Specifier Review – The building product news resource for specifiers. Architecture, design & innovation, news & views from the built environment.	824
42. (44)	SiemensBuildingTech We’re not just about buildings. We’re about what buildings make possible. Find out more: https://t.co/CbEzhXy37O #CreatingPerfectPlaces	824
43. (45)	BDP BDP is a major international, interdisciplinary practice of architects, designers, engineers and urbanists.	824
44. (81)	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.	823
45. (34)	Nick Grant Passivhaus Consultant excited by Sustainable building design. Technical Director of UK Passivhaus Trust but views are mine or stolen.	822
46. (41)	Knauf Insulation UK Knauf Insulation is the UK’s leading insulation manufacturer creating energy efficient systems for buildings.	821
47. (48)	ECA Founded in 1901 - shaping the future: ECA is the UK’s leading trade association for electrotechnical and engineering services organisations	820
48. (47)	Pro Electrician The magazine for the electrical trade. News, tech updates, product reviews, competitions. Available for free at electrical wholesale trade counters nationwide.	820
49. (46)	Energyinstitute The chartered professional membership body bringing global energy expertise together. Chief Executive is @KinghamEI. Tweets are not endorsements.	818
50. (50)	Lutron Electronics Lutron Electronics is a leading manufacturer of energy-saving light, shade, and temperature controls for new and existing homes and offices.	818
51. (49)	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.	816
52. (51)	WELLcertified At IWBI we believe that buildings should be developed with people's health and wellness at the center of design. #WELLBuildingStandard	815
53. (52)	EmersonComRes We combine deep expertise and a natural "Can't we do this better?" curiosity for true innovation that enriches our customers' comfort and their lives.	815
54. (53)	Carrier HVACR A world leader in high-tech heating, air-conditioning & refrigeration solutions for residential, commercial, retail, transport & foodservice. Part of @Carrier.	813
55. (67)	TheCIPHE The professional and voluntary regulatory body for the plumbing and heating engineering industry.	812
56. (43)	Nathan James Van Gambling BA Hon. I believe in helping people learn. Plumbing/Heating Lecturer/Assessor, International Speaker, Consultant. PR. https://t.co/wR7d13rDSB #solarthermal	812
57. (54)	VoltimumUK Voltimum is the Electrical Industry's number one web portal. Here you will find the latest in products, news, technical articles and electrical training.	812
58. (62)	Geberit For up to date news on Geberit products, innovations and real installations from installers.	811
59. (59)	Electronic Specifier Electronic Specifier features the latest product & industry news, helping those in the electronics industry make informed choices. https://t.co/xgmwz99iCi	810
60. (56)	EnviroVent UK’s leading #manufacturer & supplier of energy efficient & sustainable #ventilation products.	810
61. (57)	ASHRAEnews Shaping Tomorrow's Built Environment Today	809
62. (61)	Ecological Building At the forefront of airtight and windtight building products and natural insulations for over a decade.	809
63. (84)	Energist UK Your independent specialist for planning, sustainability and building regs. The latest industry news and activity from the team at Energist.	808
64. (55)	Building Operating Management Leading magazine for #buildingowners, #facilitymanagers, and #cre executives in commercial, institutional and healthcare facilities.	808
65. (58)	Danfoss Group We supply #energyefficient and climate-friendly solutions for selected industries. Check our latest news.	807
66. (75)	BUILD UP The European portal for #energyefficiency in #buildings. #EPBD An initiative of the @EU_Commission. Disclaimer: https://t.co/35sqxDmJvq	807
67. (60)	HPM Magazine Heating & Plumbing Monthly is a must-read magazine in the #heating and #plumbing sector. http://t.co/8a0iQ8eozk	806
68. (65)	ARCADIS Design & Consultancy for natural and built assets. #Improvingqualityoflife	805
69. (63)	Legrand Products and systems for electrical installations and information networks. Solutions for residential, commercial & industrial buildings. 1-877-295-3472.	805
70. (70)	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.	805
71. (66)	Daikin España Perfil corporativo oficial de Daikin España para escuchar, conversar y compartir novedades de la compañía, climatización eficiente y calidad del aire	804
72. (69)	WYG Group Award winning professional services firm underpinned by technical excellence. We help our clients create value, protect value, and manage risk.	803
73. (101)	Rob Berridge EngTech MCIPHE, Heating, Plumbing, System Design/Consultancy, Est:1984. For all enquires please visit our website. Also director https://t.co/ZFEWQg8YfY @HeatCalculation	802
74. (71)	Green Building Store Products and technical support for Passivhaus and low energy buildings inc @GBSWindowsDoors & MVHR design. FREE Passivhaus & retrofit technical resources.	801
75. (64)	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	801
76. (74)	Johnson Controls Sharing company and industry news from Johnson Controls' Building Technologies & Solutions. The global leader in building technology and services	800
77. (68)	Cundall Cundall are multidisciplinary consulting engineers who operate in the UK, Ireland, Australia, Asia, MENA and Europe.	800
78. (73)	Electrical Times Welcome to Electrical Times magazine – the voice of electrical contracting. Editor: lisa.peake@purplems.com See also: https://t.co/orc5zZEVNi	800
79. (72)	PHEX Since launching in 1994, PHEX is now the UK's No.1 FREE trade show series for plumbing and heating installers and contractors! Follow our instagram: @phexshow	800
80. (78)	LIGHTFAIR LIGHTFAIR International (LFI) is the world’s largest annual architectural and commercial lighting trade show and conference. May 19-23, 2019 in Philadelphia, PA	798
81. (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	796
82. (79)	Stephen Gill Changing lives through engineering #Refrigeration #coolingforall #solarcooling #CircularEconomy #mentor @coolmentoring #STEM #SEforAll #MenAsAllies	796
83. (88)	NESEA.org Advancing #sustainable #building & #energy practices in the Northeast's built environment by connecting professionals to ideas, opportunities, and each other.	796
84. (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	794
85. (105)	Stewart Gilmour CA. FD/CFO. Architecture, R2R, Sustainabilty, Passivhaus, BIM, PropTech and HealthTech. MAMIOC. Views my own.	794
86. (136)	PHAM News The technical magazine for plumbing, heating and air movement in the UK	793
87. (94)	SOM Skidmore, Owings & Merrill LLP is one of the leading architecture, interior design, engineering, and urban planning firms in the world.	792
88. (83)	ROCKWOOL We are committed to enriching the lives of everyone who comes into contact with our solutions. Tweets from ROCKWOOL UK Marketing Team. https://t.co/gdNShhyqUp	792
89. (91)	Empire Group Your one-stop center for Building Construction, Architectural plans, Engineering &Real Estate Consultancy. Service with excellence. Call/Whatsapp +256712924378	792
90. (87)	UponorUK Uponor offers innovative plumbing and heating system solutions for all building types, available from your local merchant.	792
91. (93)	SLL The SLL welcomes all those who are interested in any aspect of the world of light, lighting, and its applications.	792
92. (82)	AECB Association for Environment Conscious Building ◦ We work with our members to inspire, develop and share sustainable building practice ◦ https://t.co/QMkVMdgy00	792
93. (85)	YORK HVAC The official Twitter account for YORK HVAC. Follow us to stay up to date with the latest news.	791
94. (92)	UK BIM Alliance Cross industry alliance to drive leadership around implementation of BIM Level 2	791
95. (89)	David Frise CEO BESA does M&E in built environment Long suffering Spurs fan. Oh & occasional stand up comedy. Views my own	790
96. (104)	Hipmagazine The only magazine for plumbing and heating students and apprentices	789
97. (95)	CIBSEJournal Magazine of the Chartered Institution of Building Services Engineers	787
98. (90)	Mitsubishi Electric Mitsubishi Electric, Living Environmental Systems. Energy efficient heating, cooling & ventilation solutions. Retweets not an endorsement.	786
99. (100)	Uponor North America Uponor offers sustainable systems for homes and commercial buildings. PEX plumbing, radiant heating/cooling, home fire sprinklers, hydronic piping.	785
100. (103)	ACCA The Air Conditioning Contractors of America is the national association representing the nation's best heating, air conditioning, and refrigeration contractors.	784
101. (107)	AEE The Association of Energy Engineers is a nonprofit professional energy engineering society of 18,000 members.	784
102. (96)	P&FM Magazine Premises and Facilities Management Magazine, the independent voice of the UK FM industry.	783
103. (99)	Daikin UK Corporate Twitter profile for Daikin UK: follow for corporate news and updates.	783
104. (109)	Taco Comfort Welcome to Taco, a third generation, family owned American manufacturer of the highest quality comfort solutions for residential and commercial applications.	781
105. (97)	Parity Projects Award winning experts in home energy efficiency and retrofit. Services across the UK	780
106. (76)	World Plumbing Day Celebrate the important role plumbing plays in the health and safety of modern society - every year on March 11th. #WorldPlumbingDay	780
107. (111)	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.	780
108. (118)	New Buildings Inst. A driving force for better energy performance in buildings...NBI assesses technologies, promotes design approaches, and helps guide policies and programs	780
109. (102)	Kingspan Insulation #Kingspan #Insulation. Market leading manufacturer of insulation products & systems including OPTIM-R, Kooltherm, Therma, TEK, Thermabate & KoolDuct.	779
110. (106)	Pegler Yorkshire UK manufacturer of commercial & residential plumbing & heating products. Our social media team tweet about energy saving products & industry-related news	779
111. (108)	Arcadis N. America News and views from the North American region of the leading Design & Consultancy firm for natural and built assets. #Arcadis	778
112. (110)	Ramboll UK Ramboll provides multidisciplinary solutions that serve businesses, governments and communities around the world.	778
113. (141)	Danfoss Drives Our portfolio of high-quality, application-optimized AC drives maximizes process performance, saves the most energy and minimizes emissions.	777
114. (116)	Chapman Ventilation We do restaurant ventilation. And we do it well. Tweets by Chandni and Danielle.	777
115. (120)	Alpha Innovation UK boiler manufacturer offering a complete range of gas boilers for domestic and commercial use.	776
116. (98)	Installer2019	775
117. (113)	Stroma Building sustainability & compliance! Certification, training, software & consultancy services – for a compliant, more energy-efficient built environment.	775
118. (124)	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	774
119. (122)	Hoare Lea Engineers of human experiences.	772
120. (117)	Dr Penny Sarah Carey Science geek, narcoleptic & proud parent. All my own, often opinionated views. PhD in Building Physics. MEP & Sustainability Lead for Portakabin Group UK	772
121. (143)	Grant UK Leading heating manufacturer supplying award winning oil & biomass condensing boilers, cylinders, solar, heat pumps & controls. Business partner of @BathRugby	772
122. (112)	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	772
123. (119)	Sparks Magazine⚡️ The only magazine for apprentice electricians ⚡️ Facebook - https://t.co/NS0ZdL8Cum Instagram - https://t.co/fVqdCxKRsS	772
124. (172)	Worcester Bosch Follow us for home heating tips, advice and news from our latest range of Which? Award winning boilers. We're here 8am-6pm weekdays, 8am-4pm Sat & 9am-11am Sun	770
125. (121)	Setpoint Systems #SystemsIntegrator #BuildingControlSystems #BuildingAutomation #FacilitiesManagement #UL508A #EnergyEfficiency #IoT #CollaborativeSolutionsUnmatchedTraining	770
126. (125)	Sentinel We protect domestic & commercial #heating & #hotwater systems by providing best practice solutions & products internationally. Account hours: Mon-Fri 9-5.	769
127. (131)	Plumbing&Mechanical Follow PM for all the latest breaking news, products, articles, and events in the plumbing, mechanical and hydronic heating industries.	769
128. (129)	Tyco_IS Tyco is now Johnson Controls, the world leader in, security, fire protection, HVAC, building controls and energy storage.	768
129. (149)	BESA BESA - The Building Engineering Services Association is the UK's leading trade organisation for building engineering services contractors.	768
130. (133)	Honeywell Buildings Honeywell installs, integrates and maintains the systems that keep facilities safe, secure, comfortable, productive and energy efficient.	768
131. (130)	BoschSecuritySystems We are a supplier of security, safety, and communications products/systems. We also offer solutions for building security/automation and energy efficiency.	768
132. (132)	OpenSensors.io OpenSensors aggregates data from a variety of sensors for the next generation of smart Building Management Systems.	768
133. (128)	Bosch Security EMEA We are a supplier of security, safety, and communications products/systems. We also offer solutions for building security/automation and energy efficiency.	767
134. (123)	HPAC Engineering Content provider for those who design, specify, operate, and maintain mechanical and building-automation systems in non-residential buildings.	767
135. (115)	CALMAC Use energy more wisely with Thermal Battery cooling featuring Ice Bank #energystorage, for a more sustainable future. Over 1 GW in 60 countries.	767
136. (126)	The IES Team Passionate about green building, software simulation tools for architects & engineers and consulting services for design and operation of sustainable buildings	767
137. (134)	Carrier Carrier’s industry-leading brands support safe & sustainable buildings, & protect & preserve the global food supply. #BuildingPossible.	766
138. (114)	Philippe Moseley Work at @EU_Commission #EASME on #H2020 #energyefficiency and #renewables in #buildings and urban areas.	766
139. (137)	Kingspan Panels, UK Welcome to Kingspan Insulated Panels, UK. We’re dedicated to maximising construction efficiency and delivering superior lifetime performance and fire protection	765
140. (138)	NG Bailey NG Bailey is the UK’s leading independent engineering and services business with a deserved reputation for excellence. Passion | Integrity | Excellence	764
141. (144)	RAC Magazine Refrigeration & Air Conditioning. Informing & prompting debate since 1898! We run the Cooling Awards (@coolingawards) F-Gas Question Time etc. Tweets by Ed team	763
142. (135)	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	761
143. (165)	Testo UK https://t.co/sv2PaHnJzw Test and Measurement experts. Manufacture & Calibrate instruments for HVAC, Refrigeration, Catering, Food Processing & Climate Monitoring	761
144. (139)	CORGI Technical We are dedicated experts committed to gas safety. With nearly 50 years experience providing professional services in industry, offering support and expertise	761
145. (127)	CIPH News Canadian Institute of Plumbing & Heating (CIPH) - the association for plumbing, heating, hydronics, industrial, waterworks and other mechanical products.	760
146. (146)	Susie Diamond I am a partner at Inkling - a Building Physics consultancy keen to help make buildings more comfortable and energy efficient. #BuildingPhysics	759
147. (140)	Mark Oliver H+H UK CEO @Colt_Group providing & servicing innovative & sustainable solutions & products for natural ventilation, smoke control, solar shading, louvre & climate	759
148. (147)	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.	758
149. (150)	Cullinan Studio Cullinan Studio is a cooperative architectural and masterplanning practice engaging with organisations and communities to connect people to nature.	756
150. (154)	BBP Collaboration of the UK's leading commercial property owners who are working together to improve the sustainability of existing commercial building stock.	756
151. (145)	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	755
152. (148)	NVent Nuheat nVent NuHeat is the leading brand for premium electric floor #heating in North America.	755
153. (151)	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.	755
154. (156)	Click Scolmore We are committed to providing a comprehensive range of reliable, high quality and competitively priced electrical and lighting products.	754
155. (157)	SimonMcGuinness If you build a house, make sure its a certified Passive House.	753
156. (163)	Rinnai UK World's Largest manufacturer of gas appliances, including high efficiency multi purpose water heaters and heating systems	753
157. (155)	Claire Das Bhaumik Partner at Inkling LLP. Building Physicist. PhD. Chartered Engineer. CIBSE Fellow. KTP Supervisor. CIBSE LCEA. Runner. Guitarist. #BuildingPhysics	753
158. (159)	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.	752
159. (152)	Danfoss Cool Expert in the development of technologies of today & tomorrow in Food Retail, Air Conditioning, Industrial & Commercial Refrigeration #Cooling #HVAC #Turbocor	752
160. (142)	Dru Crawley #buildings: #tech, #performance, #netzeroenergy, #simulation, #BIM, #climatechange, #data, PhD, father of #EnergyPlus, Bentley Systems, views own	752
161. (153)	ACR Journal Essential information for air conditioning and refrigeration professionals. Subscribe FREE online to the magazine or weekly newsletter.	751
162. (158)	Smart HVAC Products We introduce new and innovative HVAC products to HVAC professionals. http://t.co/kHf2l1f0tk	745
163. (164)	HVROnlineEditor Interesting and quirky HVAC story tweets and retweets and our daily news feed.	745
164. (161)	Eric Stromquist I am in to HVAC controls, argentine tango, NLP, and using social media marketing to share information on building automation controls.	745
165. (162)	BSRIA BSRIA's engineering, technical and market research experts provide independent and practical help in design, construction and occupancy of the built environment	745
166. (168)	Memoori Smart Building Research & Thought Leadership.	743
167. (175)	Timo Ruohomäki Engineer working as a project manager at Forum Virium Helsinki. Specialties: Smart city platforms, lighting controls and building automation.	743
168. (170)	Kensa Heat Pumps The UK's only manufacturer and number one supplier of ground source heat pumps. For large installations visit Kensa Contracting: @KensaContracts	743
169. (167)	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!!	743
170. (169)	Remeha Tweets from Remeha, the leading supplier of energy-efficient, low NOx commercial heating solutions.	740
171. (176)	Coffman Engineers Civil, structural, mechanical, electrical, fire protection, PMCM, corrosion control, pipeline integrity mgmt, commissioning, & industrial consulting engineers.	740
172. (171)	Toby Cambray M&E and Building Physics Consultant Engineers, specialising in low energy and sustainable design. Tweets on that, rowing and whatever else pops into my head	739
173. (160)	Electrical Charity Supporting our people through life's challenges. The Electrical Industries Charity is the national charity for the electrical and energy industries.	739
174. (236)	Reznor The UK's leading supplier of gas-fired warm air heating and ventilation systems to the industrial and commercial building markets as part of Nortek Global HVAC	738
175. (173)	RDH Building Science We have a passion for Building Science. Specializing in Building Enclosure Consulting, Construction Project Management, Research, Energy and Forensics.	735
176. (166)	Sara MacLean Runs a low carbon PR consultancy. Writes about Building Services, Air Pollution, Sustainability and Construction...ex journalist – drinks lots of tea!	732
177. (189)	John Somerville Technical Inspector for Scottish and Northern Ireland Plumbers Employers Federation.	732
178. (178)	Mark Harris Building Technology Director at Kingspan Panels. Chairman of Engineered Panels in Construction. Interested in climate change & sustainable construction.	731
179. (193)	TLC Engineering An engineering firm that thinks boldly, listens attentively, and creates passionately.	731
180. (194)	ESTA The UK’s Energy Management industry association for demand-side energy management and efficiency including buildings, processes and transport.	729
181. (212)	APCbySchneiderElecIN We combine Technology with Innovation to create a sustainable future and an energy efficient world. Join us in this journey of change!	729
182. (185)	ACR News The only dedicated monthly UK trade magazine for the air conditioning and refrigeration industry.	728
183. (177)	Trimble MEP Trimble MEP consists of global employees providing software solutions to #electrical, #mechanical & #plumbing professionals. Part of the @TrimbleBuilding group.	728
184. (187)	Vital Energi UK’s market leaders for providing district heating, energy generation and energy management solutions. **Account not monitored out of office hours.	728
185. (183)	PassiveHouseCal Passive House California (PHCA)'s mission is to educate the public about energy efficient & healthy buildings. https://t.co/mTI5kIid9q	728
186. (184)	PHCPPros Your professional plumbing, heating, cooling and piping community. #PHCNews #PlumbingEngineer #TheWholesaler #Especificar	727
187. (182)	Airflow Developments Airflow Developments Ltd. is globally recognized as long established ventilation specialists who move air efficiently, quietly and with the utmost reliability.	727
188. (181)	CoolMentoring.org STEM Mentoring #coolmentoring #STEM #Mentor #beamentor	726
189. (191)	LG UK B2B LG Electronics UK Business Solutions. Innovative and cutting edge technology for Commercial Display, Hotel TV, Air Conditioning and Energy Solutions.	725
190. (192)	Green Gateway Green Gateway is Mitsubishi Electric UK, Living Environmental Systems commitment to the environment. Re-tweets are not endorsements.	724
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.	724
192. (197)	Yaskawa America, Inc. News and resources from Yaskawa America, Inc. - Drives and Motion Division the world's largest manufacturer of inverter and servo drives, servomotors	723
193. (208)	Will R Head of Sustainability @clarion_group Expert in building energy & sustainability, but I never stop learning. My tweets are my own.	722
194. (174)	Paul Reeve Director, ECA, UK’s leading engineering services sector body #renewables #CSR #safety #sustainability #energysolutions. RTs may≠agreement. Fellow RSC/IOSH/IEMA	721
195. (186)	Andy SNIPEF membership officer. SNIPEF is the leading trade association for plumbing and heating businesses based in Scotland and Northern Ireland	721
196. (179)	SNIPEF SNIPEF is the leading trade association for plumbing and heating businesses based in Scotland and Northern Ireland	720
197. (204)	Doug King Expert in Building Environment and Energy Performance	719
198. (195)	HVAC-Outlet, LLC http://t.co/5wG14dH98K Bringing professional grade thermostats and air purification to DIYers, HVAC Techs, and Contractors alike.	719
199. (196)	Construction BES 6001 certified steel products for the construction industry including Trimapanel, Trisomet, ComFlor, Celsius, Install and Advance sections	719
200. (199)	Alex Smith Tweeting mostly about the built environment – editor of CIBSE Journal	718
201. (201)	Glumac Engineers Glumac, a Tetra Tech Company, is a global MEP engineering and commissioning firm focused on delivering Green Buildings That Work.	718
202. (206)	Emerson Technicians & Skilled Trades Emerson Commercial and Residential Solutions - Industry channel designed to curate content for our #HVACR and #SkilledTrades audiences	717
203. (202)	Retrotec We are the world's leading blower door manufacturer, promoting green building through air tightness and enclosure integrity testing equip. & training.	717
204. (205)	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!	716
205. (200)	SALUS Controls SALUS Controls is a lead supplier of energy control solutions focused primarily on the European professional market channel. Think Heating, Think SALUS.	716
206. (210)	Ian Chapman Building Services Director @MottMacDonald and former Director of National BIM Library @theNBS. Committed to making BIM a reality. Views are my own.	714
207. (207)	TroupBywaters+Anders We are high performing, award-winning consulting building services engineers, bringing buildings to life for over 60 years.	714
208. (203)	Comfort Supply, Inc. Pittsburgh's #HVAC Systems Specialists. 1,200+ #VRF jobs including over 55,000 TONS supplied to date! Ask about getting #CSIpghCERTIFIED.	713
209. (220)	AndrewsWaterHeaters Andrews Water Heaters is the UK market leader for commercial hot water solutions. Andrews, built to perform.	713
210. (213)	CABA CABA is a trade association focused on smart homes and intelligent buildings	713
211. (216)	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
212. (214)	Bosch Security AP We are a supplier of security, safety, and communications products/systems. We also offer solutions for building security/automation and energy efficiency.	712
213. (215)	Mariana Pickering CEO + Co-Founder @EmuBldgScience - experts in #buildingscience, advanced construction technology, and #passivehouse design. Remember to #RunWildBuildPassive !	712
214. (224)	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 .	712
215. (231)	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
216. (209)	Waterman Waterman is a multidisciplinary consultancy providing sustainable solutions to the property, infrastructure, energy and environmental markets.	710
217. (217)	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.	710
218. (190)	SES Engineering The UK’s leading design-led Mechanical & Electrical (M&E) provider, specialising in the design & installation of building services & infrastructure solutions.	710
219. (219)	BuildingIQ Energy management software company redefining the way energy is managed in commercial buildings - reduce energy cost and lower energy consumption with no capex	709
220. (234)	Jackson Systems, LLC Award-winning, innovative HVAC controls, direct-to-contractor. Like us on Facebook, too! https://t.co/WK4xHRvJ0C	709
221. (232)	Atelier Ten As environmental design consultants and building services engineers we are committed to high-performance and sustainable design within the built environment.	708
222. (218)	Hilson Moran Leading multidisciplinary engineering consultancy for the built environment. Creating Environments for Life.	708
223. (247)	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.	708
224. (233)	Boiler-M8 The official account for Boiler-M8. Manufacturer of high quality magnetic heating system filters	707
225. (222)	Lindab UK At Lindab, we simplify construction. Because it is human nature to build, we make it easier to build sustainably.	707
226. (211)	IAPMO Founded in 1926, IAPMO is a world-wide nonprofit association focusing comprehensive capabilities on the technical aspects of #plumbing & #mechanical regulations	706
227. (245)	Switch Automation Switch Automation creates technology to bring people and planet to the center of building operations.	706
228. (227)	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.	706
229. (221)	Zehnder UK Indoor Climate Solutions: Heating, Cooling & Ventilation.	706
230. (241)	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	706
231. (223)	Goodway Technologies Goodway Technologies official twitter account. Goodway Technologies Corporation is your source for quality HVAC and facility maintenance equipment.	705
232. (225)	Trend Controls Trend is a major international supplier of Building Energy Management Systems (BEMS) with a worldwide distribution and support network covering 50+ countries.	705
233. (229)	Altecnic Manufacturing accredited #plumbing & #heating equipment, raising industry best practice, making affordable systems safer, sustainable, easier to fit & maintain.	704
234. (248)	Buteline Plumbing & Heating System - UK Buteline designs, engineers & manufactures a world-acclaimed plumbing system for hot & cold potable water & Central Htg for domestic & commercial applications.	703
235. (243)	Danfoss Cool US Contractor, wholesaler and end user support for the #HVAC and #refrigeration industries. Find tips, tricks, and tools to be sure you are equipped for success.	703
236. (230)	Arthur McKay UK Building Support Services company delivering Mechanical & Electrical, Fire Protection, Networks and Facilities Management services with YOU at the centre.	703
237. (261)	RAC Cooling Awards RAC Cooling Industry Awards 2018	702
238. (180)	CIBSE West Midlands The Chartered Institution of Building Services Engineers (CIBSE) West Midlands region	702
239. (235)	Colt International Colt International deelt kennis en nieuws over duurzaam bouwen, architectuur, klimaattechniek, daglichttechniek en brandveiligheid. Bezoek ons blog op:	702
240. (238)	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.	702
241. (240)	Calgary Hydronics Boilers, Hydronics, HVAC related tweets.	701
242. (265)	Ref_Industry Daily #refrigeration news. Send us your HVACR news info@refindustry.com. Subcribe to our weekly newsletter https://t.co/wXuAVnT39P.	701
243. (246)	Monodraught® Natural Lighting, Natural Ventilation and Natural Cooling	700
244. (251)	UrbanEnergy Research Heriot-Watt Urban Energy Research Group. Building energy performance, energy systems, and energy policy. Dr David Jenkins #cedri #cesi D.P.Jenkins@hw.ac.uk	700
245. (263)	BSD BSD is an independent firm of mechanical and electrical consulting engineers that make buildings comfortable, functional and efficient.	699
246. (260)	EHPA The European Heat Pump Association (EHPA) promotes awareness and deployment of #HeatPump technologies in Europe. Join the #HeatPump Community!	699
247. (244)	Strong Energy Ltd We have vast experience of low carbon, low energy buildings & renewable energy,distribution channels for biomass,heat pumps & high performance wood chip.	698
248. (226)	Hurley Palmer Flatt Hurley Palmer Flatt - engineering consultants, delivering design solutions globally. Leaders in mission critical engineering, energy and sustainability.	698
249. (259)	LEDA LTD Multi-disciplinary co-op of architects and building services engineers, creating great sustainable buildings that respect the environment & are a joy to use.	698
250. (237)	Tridium Inc. The global leader in open platforms, application software frameworks, automation infrastructure, energy management & device-to-enterprise integration.	697
251. (264)	Aspen Pumps Aspen Pumps is the market leader in the design & manufacture of condensate pumps for the air conditioning industry. We aim to make the installers life easier!	697
252. (255)	One Eighty Light We help create beautiful spaces with light. Not just functional light, but light that invigorates, lifts the spirit, and touches peoples lives every day.	697
253. (256)	Casaplex Award-winning provider of Home Automation, Home Theaters, Smart Homes, Smart Buildings and IT Services in DC, MD, VA and FL	697
254. (253)	Breathing Buildings Breathing Buildings is a unique low-energy ventilation company. Home of the e-stack and NVHR product ranges.	695
255. (228)	Bouygues Energies & Services UK Bouygues Energies & Services is a customer-centric facilities management and energy performance partner.	695
256. (239)	Luxaire HVAC The official Twitter account for Luxaire HVAC. Follow us to stay up to date with the latest news.	695
257. (198)	Smartcool Systems Inc. Smartcool Systems Inc. (TSXV: SSC) provides cutting edge energy efficient & energy cost reduction solutions... For more information: mike.kordysz@smartcool.net	695
258. (242)	Elementa Consulting Elementa is an award winning building services, low carbon and sustainability consultancy specialising in low energy design.	694
259. (267)	Demand Logic Property Performance Simplified. A digital retrofit to make buildings more comfortable, efficient & easier to maintain. #IoT #FitbitforBuildings #smartbuildings	694
260. (249)	AM Joynes Electrical Manufacture and Design of AC/DC Switchgear, Bespoke Control Panels, HVAC Panels, Copper Junction Boxes, Earth Bars and Busbars, Electrical Installation and Test	694
261. (254)	Bosch Security We are a supplier of security, safety, and communications products/systems. We also offer solutions for building security/automation and energy efficiency.	693
262. (272)	Couchperrywilkes Environmental Building Services Consultancy. Formed in 1978, we deliver sustainable and low energy buildings across all market sectors.	692
263. (257)	HeatandPlumb.com https://t.co/kAYa3qujC7 supplies over 50,000 heating, plumbing & bathroom products to the trade & public, at competitive online prices. Call 0203 113 2122	692
264. (268)	Mechanical Business Canada's mechanical trade magazine for contractors, wholesalers, and specifying engineers.	691
265. (271)	#TheHVACRShow The HVACR Show is the ONLY national exhibition for the refrigeration, air conditioning, ventilation, heating and heat pump sectors.	691
266. (266)	EcoDesignConsultants Architects specialising in Sustainability and low carbon housing, European Certified PassivHaus Designer.	691
267. (284)	Zerum We are a Development and Design Consultancy: • Planning • Building Services Design • Project & Development Management	690
268. (274)	Danfoss U.S. #EngineeringTomorrow to do more with less today. Follow @Danfoss_US for sustainable solutions in the #HVAC and #refrigeration industries.	690
269. (258)	NIBE Energy Systems NIBE is one of Europe's leading man