Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in Detroit, Michigan, holding a 3.8-star rating compiled from 38 customer reviews. Established as a contractor-only supply house, this business exclusively serves licensed HVAC professionals rather than retail homeowners. The store maintains weekday hours from 7:30 AM to 4:30 PM and Saturday availability from 8 AM to noon, closed on Sundays. Located in Detroit, the supplier serves the broader Metro area including nearby communities such as Dearborn, Hamtramck, and Highland Park.

This supplier differentiates itself through an extensive inventory spanning commercial packaged units, residential split systems, and mini-split configurations including variable capacity systems. Their product lines cover manufactured housing equipment, evaporator coils, gas and oil furnaces, and air handlers. The business maintains specialized categories for field-installed accessories and multi-zone systems, positioning itself as a comprehensive resource for mechanical contractors seeking single-source procurement for diverse installation requirements.

Customer experiences reveal mixed service dynamics. Reviewer Hasan Hazime specifically praised Tony for making equipment location and purchase straightforward, describing the interaction as helpful and kind. Conversely, multiple reviewers documented challenging encounters, including one customer who waited on hold for 40 minutes during closing hour and another who reported receiving incorrect parts despite staff uncertainty about component identification. The contractor-only business model means residential customers cannot make direct purchases, though some reviewers note generational family relationships with the supplier.