ASHRAE
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. publishes standards in the areas of HVAC and refrigeration for use by contractors, engineers, building owners and building code bodies.
http://www.ashrae.org

Chartered Institution of Building Services Engineers (CIBSE)
UK-based institution for building services including heating, ventilation and air conditioning.
http://www.cibse.org/

Building Services and Environmental Engineer
Building Services & Environmental Engineer magazine covers all aspects of building services engineering, plus an online job site.
http://www.bsee.co.uk

Circon Systems Corp.
Circon combines LonMark International's open system standards with advanced technology to develop and manufacture controls for HVAC systems, access control, energy management, custom equipment and OEM.
http://www.circon.com/

The Trane Company
Manufacture heating, ventilating, air conditioning and building management equipment and systems.
http://www.trane.com/

Meinhardt Consulting Engineers
Engineering consultants as well as environmental, planning, management and technology services. Meinhardt consulting engineers are truly global providers.
http://www.meinhardtgroup.com/

Walker Adamson Ltd Building Services
Walker Adamson and Co. Ltd experts in Heating, Plumbing, Pipework, Air Conditioning and ventilation services.,
http://www.walkeradamson.co.uk

Heating, Ventilation, Air Conditioning Documents
Heating, Ventilation, HVAC, Air Conditioning, Air quality, standards, federal, construction, documents, HVAC systems and components, benchmark testing of limit states functions for HVAC, HVAC durability, HVAC failure mechanisms, HVAC limit state functions, HVAC performance factors, HVAC system reliability, pumps, boilers, chillers, cooling towers, air handling units
http://tech-env.com/hvac.html

A.M. Environmental Services Ltd
Design and installation of air conditioning and building services in the UK. Turnkey provider includes electric, plumbing, controls.
http://www.dis.pwp.blueyonder.co.uk

Thermal Concepts, Inc.
Air conditioning, ductwork, custom sheet metal, piping, controls and building automation, insulation and service to the commercial and industrial markets in the State of Florida.
http://www.thermalconcepts.com