As part of the arrangement, the marketing and customer-service operations of Ward and Ampco products will be combined.
Ward makes ductwork accessories for the residential and commercial HVAC market, including connectors, access doors, fire dampers, ceiling radiation dampers, gaskets, sealants, hangers and ductwork tools.
Ampco markets a line of venting systems for chimneys, grease ducts, engine and turbine exhausts.
While Ward and Ampco will retain separate brand identities, officials said, the move will mean more extensive service and product expertise for commercial customers of Hart & Cooley.
"The collective strength of the Ward and Ampco brands will provide increased sales coverage, greater ability to service engineering requirements and an extensive product offering to the commercial side of the HVAC industry," said Gary K. Henry, president of Hart & Cooley.