Commercial HVAC

Ainsworth

Toronto, Canada

Ainsworth is one of Canada's largest integrated multi-trade commercial HVAC, mechanical, electrical, and facilities services companies, founded in 1994 and headquartered in Toronto, Ontario. A GDI Integrated Facility Services company, Ainsworth generates over $500 million in annual revenue with thousands of employees across Canada and the United States providing HVAC installation, chiller maintenance, building automation, boiler services, refrigeration, and 24/7 facilities support for commercial, institutional, healthcare, retail, and industrial clients. The company serves major Canadian corporations, hospitals, universities, and government facilities.

EMCOR Group

Norwalk, United States

EMCOR Group, Inc. (NYSE: EME) is one of the largest providers of commercial mechanical, electrical construction, and facilities services in the United States, headquartered in Norwalk, Connecticut. With more than 40,000 skilled professionals across 100+ companies and 420 locations, EMCOR generated over $16 billion in annual revenue providing commercial HVAC installation, facilities management, building automation, energy infrastructure, and mechanical services for major government agencies including NASA, the FDIC, and the Department of Defense, plus Fortune 500 corporations and critical infrastructure projects.

EQUANS UK & Ireland

United Kingdom

EQUANS UK & Ireland is a leading multi-technical services provider and part of the global EQUANS group (owned by Bouygues Group), headquartered in Manchester, England. EQUANS provides commercial HVAC design, installation, maintenance, and energy efficiency services including chiller maintenance, refrigeration, air conditioning, heating systems, and building management controls for commercial, industrial, public sector, and critical infrastructure clients across the UK and Ireland. The company specializes in decarbonization projects, heat networks, energy performance contracting, and complex mechanical and electrical engineering for large-scale built environments.

McKinstry

Seattle, United States

McKinstry is a privately-held national construction and energy services company founded in 1960 and headquartered in Seattle, Washington. Led by CEO Elyse McKinstry, the company generates $2.5 billion in annual revenue providing commercial HVAC, mechanical contracting, design-build, energy solutions, and facility services across the United States. McKinstry is known for its integrated approach combining construction with energy management, sustainable building retrofits, and decarbonization projects for higher education, healthcare, commercial real estate, and government clients, with particular strength in the Western United States.

Mitie Technical Services

United Kingdom

Mitie Technical Services is the engineering services division of Mitie Group plc (LSE: MTO), one of the United Kingdom's largest facilities management and engineering companies, headquartered in London. With over 72,000 employees across the UK, Mitie provides commercial HVAC design, installation, maintenance, and 24/7 reactive service for offices, retail, healthcare, government, transport, and critical infrastructure customers. Services include chiller maintenance, VRF/VRV systems, building management systems (BMS), air handling units, and mechanical and electrical engineering with a strong focus on net-zero decarbonization and energy efficiency.

Smith and Long

Toronto, Canada

Smith and Long is a Toronto-based commercial HVAC and mechanical contractor serving the Greater Toronto Area and Southern Ontario with commercial HVAC installation, maintenance, chiller service, boiler service, building automation, and emergency response services. The company serves commercial buildings, healthcare facilities, retail chains, hospitality properties, and institutional clients with 24/7 service dispatch, planned maintenance programs, and energy retrofit capabilities. Smith and Long holds TSSA certification, is a union signatory contractor, and specializes in complex mechanical systems for Class A office buildings and healthcare facilities.

TDIndustries

Dallas, United States

TDIndustries is a premier employee-owned facilities services and mechanical construction company founded in 1946 and headquartered in Dallas, Texas. Named the No. 1 top-performing plumbing and HVAC contractor in the US by Associated Builders and Contractors for six consecutive years, TDIndustries specializes in commercial HVAC design-build, mechanical construction, building automation, energy management, and facilities lifecycle services for healthcare, higher education, commercial campus, and aviation clients across the US Sun Belt with 45 locations and $600+ million in annual revenue.