Johnstone Supply

Johnstone Supply operates as a heating equipment supplier in Warminster, Pennsylvania, holding a 4.6-star rating drawn from 24 customer reviews. This location functions as a trade distributor, stocking commercial and residential HVAC equipment including split systems, mini-split systems, gas and oil furnaces, evaporator coils, air handlers, and field-installed accessories. The supplier serves contractors throughout the greater Warminster region, offering extended warranties and maintaining a physical storefront at 1025 Street Road with weekday hours from 7 AM to 4:30 PM and Saturday availability until noon.

The Warminster branch distinguishes itself through specialized account management and part-sourcing capabilities that many broader distributors cannot match. Website selections show single-packaged units, multi-zone systems, variable capacity systems, and manufactured housing equipment alongside traditional residential unitary products. Customers note that when a specific part isn't stocked, staff actively searches across other supplier networks to locate needed components. The supplier carries both residential and commercial equipment lines, positioning them as a comprehensive resource for HVAC professionals handling diverse project requirements.

Multiple reviewers highlight specific team members who have consistently delivered beyond standard distributor support. Paul Nestler and his Warminster team receive recognition for treating contractors with respect and providing honest guidance, including flagged recommendations when ordered parts won't resolve the underlying issue. Aaron Lister draws particular praise for assisting with complex equipment designs and conducting on-site customer surveys. One reviewer recounts nearly two decades of satisfaction, emphasizing that the staff sources unavailable parts rather than simply processing orders. Another notes team availability outside normal business hours when urgent project needs arise.