Johnstone Supply
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Claim This BusinessAbout Johnstone Supply
Johnstone Supply operates as a heating equipment supplier in Waukesha, Wisconsin. The business holds a 5.0-star rating from four customer reviews and serves contractors throughout the greater Waukesha area. The retail location maintains Monday through Friday hours from 7 AM to 4:30 PM, with Saturday and Sunday closed.
The company distinguishes itself as a wholesale distributor offering an extensive catalog of HVAC equipment. Their inventory includes single packaged units, split systems, and mini-split systems for both residential and commercial applications. They stock gas furnaces, oil furnaces, evaporator coils, and air handlers, along with field-installed accessories. The business also provides extended warranty options and contractor training classes, positioning themselves as a resource for professional HVAC technicians rather than direct-to-consumer service.
One reviewer, Tory Quick, awarded five stars and described the team as a great group of guys who consistently help when customers find themselves in a bind. This feedback suggests the business prioritizes responsive support for contractor customers needing equipment or parts.
What Customers Say
One of four reviewers specifically praised the team for helping during urgent situations, though the limited sample prevents broader sentiment analysis.
Working Hours
| Sunday | Closed |
| Monday | 7 AM–4:30 PM |
| Tuesday | 7 AM–4:30 PM |
| Wednesday | 7 AM–4:30 PM |
| Thursday | 7 AM–4:30 PM |
| Friday | 7 AM–4:30 PM |
| SaturdayToday | Closed |
Services
HVAC Equipment Distribution
Wholesale supply of heating and cooling equipment to licensed contractors throughout the region.
Residential Systems
Single packaged units, split systems, and mini-split systems for homes.
Commercial HVAC Units
Commercial-grade heating and cooling equipment for business installations.
Furnace Supply
Gas furnaces and oil furnaces for replacement and new installations.
Air Handlers and Coils
Evaporator coils and air handlers for split system configurations.
Extended Warranties
Optional extended warranty programs available for equipment purchases.
Contractor Training
Training classes designed for HVAC professionals and technicians.