About Us

G & O Thermal Supply was incorporated in the state of Illinois in 1968. The prime responsibility of the company is to supply heating, air conditioning, refrigeration, ventilation, electrical and industrial process controls and accessory products to approved accounts in the above related trades.

Besides providing thousands of stock products, the company provides G & O delivery vehicles to speed these products to our customers. These products are backed by factory trained personnel to help provide G & O customers with the technical assistance they may require. Call G & O today or the next time you have a parts problem. You won't be disappointed.

Our Mission:
Our mission is to establish G&O Thermal Supply Company as the leading supplier of controls and related accessories to residential and commercial contractors and industrial users.  With a friendly atmosphere, prompt service, a smile and a handshake, we promise our customers will not be disappointed with their:

G&O Thermal Supply serves the HVAC community in the commercial, residential, and maintenance/repair/operations (MRO) markets.  Whether your business is industrial, commercial, institutional, or residential, G&O Thermal Supply can provide everything you need.

When It Comes to Commercial HVAC Distributors, Your Choice Is Clear
G&O Thermal Supply Company Has Been Awarded Honeywell Diamond Distributor Status for 2007.