DIY's - Start Here!  We have Everything YOU Need at a Price YOU Can Afford.

Douglas Heating Supply Co. is a full line wholesale distributor of air conditioning units, air conditioning parts,  heating equipment, HVAC parts and supplies.  We sell to licensed HVAC, Plumbing, and Electrical contractors exclusively.  Douglas Heating Supply Co. has been serving Kalamazoo, Mi and the surrounding areas with great service and price.  We proudly offer the Goodman, Payne and Miller brands as our main lines of heating and air conditioning equipment as well as many other prominent brands.  Our product offerings are complete for both residential and commercial applications.  Everything you will need for all types of installations is at our location. 

At Douglas Heating Supply Co., offering you the best product lines and the highest level of customer service is of primary importance.  Give us a call any time and explore all the products and services we have available for you today.  Better products and better customer service is a reality, and it’s just one phone call away!  Contact us today.  We look forward to serving you and your customers!

Wholesale to the Public. Satisfaction Guaranteed!


Ever wondered what the best way is to install a new component or replace that part? Check out our tips and ideas section!




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Find the parts and units you are looking for . . . right from the comfort of home. Shop 24 hours a day, 7 days a week!