The Mechanical Contractors Association of America: www.mcaa.org

 The Association of Energy Engineers: www.aee-ncc.org

 The American Society of Heating, Refrigeration, and Air Conditioning Engineers: www.ashrae.org

 The Washington DC Building Congress: www.wbcnet.org

 Property Management Association: www.pma-dc.org

 The National Capital Healthcare Engineering Society: www.nches.org

 The Baltimore Building Congress: www.bcebaltimore.org

 The International District Energy Association: www.districtenergy.org

 SG America - Heat Exchange & Dehumidification: www.sgamerica.com