American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
ASHRAE advances the arts and sciences of heating, ventilation, air conditioning, refrigeration and related human factors to serve the evolving needs of the public and ASHRAE members.

Air Conditioning Contractors Of America (ACCA)
ACCA is the largest association of HVACR contractors and the preferred service provider for members in all 50 states and worldwide.
Refrigeration Service Enginneers Society 
Is the definitive industry leader in all segments of the HVAC/R industry  providing superior educational training

Western Regional Masters Builders Association