Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in Northridge, California, holding a 4.0-star rating across 28 verified reviews. The business maintains Monday through Friday hours from 7 AM to 5 PM, with Saturday availability from 8 AM to noon. This establishment exclusively serves licensed HVAC contractors and maintenance professionals, maintaining a clearly posted policy at the entrance that restricts sales to credentialed trade professionals only. The Northridge location serves contractors throughout the San Fernando Valley region, providing a convenient source for professional-grade HVAC equipment and components.

The supplier differentiates itself through an extensive inventory of commercial and residential HVAC equipment spanning multiple system configurations. Website listings reveal specialized product categories including mini-split systems with variable capacity technology, multi-zone configurations, and single packaged units. The operation offers field-installed accessories, extended warranties, and manufactured housing solutions alongside traditional split systems. Gas furnaces and oil furnaces comprise the heating equipment selection, while air handlers and evaporator coils support complete system installations. This breadth enables contractors to source comprehensive system components from a single distributor location.

Customer reviews identify several team members who consistently receive recognition for service quality. Xavier and Sean at the counter are noted for maintaining organization and store presentation. Reviewer Leo specifically mentions JC and Jennifer alongside other staff for professionalism exceeding customer expectations. Matthew the manager receives repeated mention for treating contractors like family and providing ongoing assistance. Additional reviewers highlight Mario for particularly helpful support during parts procurement. The combined feedback indicates a team committed to contractor-focused service across multiple decades of operation.