Johnstone Supply
Is this your business?
Claim it free to verify your info, earn a verified badge, and receive customer inquiries. Takes about a minute by phone.
Claim This BusinessFeatured placement from $39 — optional, after you claim.
About Johnstone Supply
Johnstone Supply operates as a heating equipment supplier in Downingtown, Pennsylvania, holding a 3.7-star average across 22 documented customer reviews. The establishment maintains standard commercial hours from 7 AM to 5 PM on weekdays while observing weekend closures. This location functions as part of a broader regional network with links to additional stores throughout the distribution chain, allowing inter-store inventory transfers for specialized components. The business serves the broader Chester County area, including connections to nearby municipalities such as Coatesville, Exton, and the surrounding communities within the Downingtown ZIP code regions.
The supplier distinguishes itself through an extensive multi-brand Parts cross-referencing capability, enabling procurement of specialized components across numerous manufacturers without typical wholesale restrictions. Their inventory encompasses commercial packaged units, mini-split configurations, variable capacity systems, and manufactured housing equipment alongside traditional split systems. The operation maintains a broad selection of evaporator coils, air handlers, gas furnaces, and oil furnace units supported by extended warranty programs. Additionally, the store offers field-installed accessories and multi-zone configurations suitable for both residential and light commercial applications.
Customer narratives highlight specific personnel who have earned recognition, including Tim at the counter whom reviewers describe as consistently accommodating and eager to locate obscure components. One documented case involves a homeowner who initially contacted a different Johnstone location lacking required inventory, subsequently receiving a referral to the Downingtown branch where the specific igniter part was located and reserved. Another reviewer recounts successful procurement of a capacitor when other retail outlets proved unsuccessful, crediting the team's willingness to assist residential customers outside typical contractor channels.
What Customers Say
Four reviewers awarded five-star ratings emphasizing the breadth of available parts inventory and knowledgeable counter staff. Among negative reviews, pricing concerns and contractor-only purchase requirements surface as primary grievances, though one reviewer notes successful residential transaction after other locations declined.
Working Hours
| Sunday | Closed |
| Monday | 7 AM–5 PM |
| Tuesday | 7 AM–5 PM |
| Wednesday | 7 AM–5 PM |
| Thursday | 7 AM–5 PM |
| FridayToday | 7 AM–5 PM |
| Saturday | Closed |
Services
HVAC Parts Cross-Referencing
Systematic component lookup across multiple manufacturers enabling procurement of obscure replacement parts.
Commercial Packaged Units
Pre-assembled heating and cooling systems designed for light commercial building installations.
Mini-Split Systems
Ductless configuration options including single zone and multi-zone setups for targeted climate control.
Variable Capacity Systems
Advanced systems modulating output for enhanced energy efficiency in residential applications.
Residential Split Systems
Traditional paired indoor and outdoor unit configurations for whole-home heating and cooling.
Furnace Replacement Components
Supply of gas and oil furnaces along with installation accessories and evaporator coils.
Air Handler Units
Blower assemblies and connected coil systems for forced-air heating distribution.