Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in El Cajon, California, holding a 3.3-star rating drawn from 23 customer reviews. The location maintains standard commercial hours, opening at 7 AM Monday through Friday and closing at 5 PM, with abbreviated Saturday availability from 8 to 11:30 AM. This establishment functions as a distributor rather than a traditional HVAC contractor, specializing in equipment and parts for heating and cooling systems.

The supplier maintains an extensive inventory spanning multiple HVAC categories, including single packaged units, split systems, mini-split configurations, and variable capacity systems for residential applications. Commercial offerings cover manufactured housing equipment, air handlers, evaporator coils, and both gas and oil furnaces. Field-installed accessories and multi-zone systems round out the product lineup, positioning this as a comprehensive source for contractors seeking equipment and specialty tools.

Customer experiences reveal a mixed operational model. Reviewer Cody Bailey notes the staff works to match customers with correct parts on the first attempt and resolves issues when mismatches occur. Another reviewer describes encountering a staff member who declined assistance after learning the caller was not a licensed contractor. Multiple reviews indicate this location serves exclusively professional contractors rather than homeowners directly.