Johnstone Supply

Johnstone Supply is a heating equipment supplier and HVAC parts distributor serving contractors in Durham, North Carolina, and surrounding communities. With 40 verified customer reviews and a 3.6-star average rating, this branch functions as a contractor-only warehouse where professional tradespeople source components, units, and accessories for residential and commercial installations.

What distinguishes Johnstone Supply from retail HVAC stores is its wholesale-only model and technical depth. The inventory spans major categories including split systems, mini-split systems, geothermal units, commercial refrigeration, and an extensive selection of OEM parts, coils, compressors, and motors. They offer a training calendar with scheduled tech services, helping contractors stay current on evolving equipment protocols.

Customer feedback reveals a divided experience. Reviewers Sean Louk and Doug Elliott highlight knowledgeable staff and consistent inventory, with Louk noting Michelle as a helpful resource. However, multiple customers report frustration with unresolved warranty claims and product failures occurring within months of purchase, including a TXV component replacement scenario that needed addressing after just three months.