Johnstone Supply

Johnstone Supply serves contractors and homeowners from its South Plainfield location, earning a 4.2-star rating across 44 customer reviews. As a heating equipment supplier, the store provides HVAC parts, tools, and units to professionals and DIYers in Middlesex County and surrounding New Jersey communities. The retail outlet operates Monday through Friday from 7 AM to 5 PM, with Saturday hours extending to noon.

The supplier stocks residential and commercial HVAC equipment including gas furnaces, oil furnaces, split systems, mini-split systems, and single packaged units. Their inventory features evaporator coils, air handlers, and extended warranty options for multiple system types. The store also carries field installed accessories and manufactured housing equipment, positioning itself as a one-stop resource for contractors tackling installation projects.

Customer reviews highlight specific team members who deliver memorable service. Melvin Peralta describes working with David, who consistently anticipates contractor needs and picks up the phone even during busy periods. Kelvin Chen credits Hector with answering all questions during a single visit. One reviewer recounts returning used tools to the shelf, while another describes being declined a purchase due to account location restrictions. These accounts illustrate the range of interactions customers experience at this supplier.