Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in Mesa, Arizona, serving contractors across the East Valley including Gilbert, Chandler, and surrounding communities. The Mesa location holds a 4.9-star rating compiled from seven customer reviews, reflecting strong satisfaction among the professional technicians who rely on this wholesale outlet for job-site parts and equipment. The store maintains weekday hours from 7 AM to 5 PM, Monday through Friday, closed on weekends, and serves exclusively licensed HVAC contractors rather than retail homeowners.

This contractor-only distributor sets itself apart through an extensive inventory spanning commercial packaged units, residential split systems, and variable-capacity mini-split configurations. The Mesa branch stocks furnace options including both gas and oil models, paired with evaporator coils and air handlers for complete system installations. Technicians can access extended warranty programs and field-installed accessories, positioning Johnstone Supply as a one-stop wholesale resource for professional crews completing new constructions, replacements, and service calls throughout the Phoenix metropolitan area.

Five-star reviews consistently recognize Don at the front counter, with customers describing personalized interactions where he asks "What can I do for you?" before suggesting appropriate parts. Shawn Henry notes that everyone knows his name upon arrival, while Alex keeps the shelves well-stocked with supplies that technicians need for same-day installations. Dr. Dan relies on this Mesa location for acquiring equipment on customer jobs, appreciating the friendly staff who understand the time-sensitive nature of service calls.