Johnstone Supply

Johnstone Supply in Florham Park, New Jersey is a heating equipment supplier serving professional HVAC contractors rather than residential homeowners. Located at 19 Vreeland Road, the distributor maintains 33 customer reviews with an impressive 4.8-star rating. The location operates Monday through Friday from 7 AM to 5 PM, with Saturday hours from 7:30 AM to noon and Sunday availability listed as closed. Contractors throughout northern New Jersey rely on this supplier for equipment, parts, and knowledgeable counter support.

What distinguishes this supplier is its focus on contractor-only distribution with a comprehensive inventory spanning residential and commercial HVAC systems. The website showcases single packaged units, split systems, mini-split systems, evaporator coils, gas furnaces, oil furnaces, and field-installed accessories. The supplier maintains partnerships with major HVAC equipment manufacturers, offering products across multiple efficiency ratings and configurations suitable for both new construction and replacement applications.

Customer reviews consistently highlight the counter staff's product knowledge and willingness to assist with complex parts searches. Reviewers specifically mention Brian D, Lia, and Jen in Cranford as team members who have resolved difficult parts challenges and expedited orders under time pressure. One contractor describes Brian Di Alfonso as someone who consistently delivers parts or answers even when the contractor admits to having minimal information to share. Another reviewer notes the team secured a same-day order execution through coordinated effort between the Florham Park and Cranford locations.