Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in Comstock Park, Michigan, serving the greater Grand Rapids region including nearby Ada, Rockford, and Sparta. With a rating of 4.2 stars across 35 customer reviews, the company has built a two-decade presence in the area's HVAC distribution network. The store functions primarily as a wholesale supplier, stocking residential and commercial heating equipment for professional contractors rather than retailing directly to homeowners.

The supplier differentiates itself through an extensive catalog of HVAC equipment spanning multiple categories. Their inventory includes single packaged units, split systems, and mini-split configurations for both residential and commercial applications. They carry furnace options ranging from standard gas models to oil furnaces, alongside evaporator coils, air handlers, and variable capacity systems. The store also offers extended warranties on equipment and maintains a selection of field-installed accessories for on-site customization.

One customer narrative reveals the contractor-only business model in action. Maria Sobol visited the store on Christmas Eve when her furnace limit switch failed during subzero temperatures. Despite arriving with the failed component, she encountered resistance from staff who initially refused service, stating the company sells only to licensed contractors. After requesting assistance from another customer who was a contractor, she was ultimately able to purchase the $13 part. This experience underscores that homeowners seeking parts direct may face challenges and would need to arrange contractor accompaniment for purchases.