Useful construction and building services web links evaluated and selected by a network of subject specialists are listed below:  

American Society of Heating Refrigerating and Air Conditioning Engineers (ASHRAE)
US Professional Association

Building Services Research and Information Association (BSRIA)
A consultancy, test and research organisation providing services for construction and building services companies.

Chartered Institute of Building Service Engineers (CIBSE)
International (UK based) body representing and providing services to the building services profession

Chartered Institution of Building Services Engineers publication Guide L Sustainability
The first CIBSE guide to sustainability accompanied by a searchable online database of good practice measures.

IMechE Construction & Building Services Division
Includes details of events and members of the CBSD board

Institution of Civil Engineers (ICE)
International (UK based) professional body for civil engineering

Institute of Plumbing and Heating Engineering
UK professional and technical body for plumbing and heating professionals

Institution of Structural Engineers (IStructE)
International (UK based) professional body for structural engineering