Johnstone Supply

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Claim This BusinessAbout Johnstone Supply
Johnstone Supply in Upland, California operates as a heating equipment supplier serving the broader Inland Empire region. The location maintains a 4.0-star rating drawn from 19 customer reviews, with a solid base of five-star feedback balanced against some critical voices. Business hours run Monday through Friday from 7 AM to 5 PM, with Saturday availability until noon and Sunday closure. The shop functions as a distributor offering both commercial and residential HVAC equipment, with a catalog spanning packaged units, split systems, gas and oil furnaces, air handlers, and evaporator coils. While marketing materials suggest a contractor-focused model, reviewer accounts confirm sales to the general public for parts and complete equipment purchases.
The Upland branch distinguishes itself through an extensive product catalog that exceeds typical big-box retail offerings. Website listings reveal specialized categories including mini-split multi-zone and variable capacity systems, manufactured housing equipment, and field-installed accessories. The shop carries major residential brands across gas furnaces, oil furnaces, and extended warranty options. A reviewer specifically notes the availability of filtration products that competing retailers in the area do not stock, suggesting inventory depth beyond standard residential supplies. Commercial offerings include single packaged units and split system configurations alongside evaporator coil and installation accessory lines.
Customer accounts name specific team members who have shaped their service experiences. A reviewer describes Rich as helpful and knowledgeable during a straightforward parts transaction, while another customer recounts positive interactions with staff who made it easy to translate professionalcourtesy to their own clients. One reviewer notes a warranty dispute involving a noisy Goodman compressor where management assistance fell short, resulting in the customer purchasing replacement equipment elsewhere. Another account describes extended hold times followed by an unsatisfactory callback experience. These varied experiences suggest service quality that depends significantly on timing and specific staff interactions.
What Customers Say
Six of eight detailed reviews award five stars, citing fast service, helpful staff, and product availability. Negative feedback centers on two instances of poor customer service and a warranty claim dispute, with one reviewer specifically naming staff members Richard and Ryan in an unfavorable context.
Working Hours
| Sunday | Closed |
| Monday | 7 AM–5 PM |
| Tuesday | 7 AM–5 PM |
| WednesdayToday | 7 AM–5 PM |
| Thursday | 7 AM–5 PM |
| Friday | 7 AM–5 PM |
| Saturday | 8 AM–12 PM |
Services
Commercial HVAC Equipment
Single packaged units, split systems, and manufactured housing HVAC systems for commercial applications.
Residential Heating Systems
Gas furnaces, oil furnaces, and single packaged units for home heating needs.
Mini-Split Systems
Multi-zone, single-zone, and variable capacity ductless systems for flexible residential cooling.
Air Handlers and Coils
Air handlers and evaporator coils for residential and light commercial installations.
Installation Accessories
Field-installed accessories and components for professional HVAC system setup.
Extended Warranties
Extended warranty options available for residential unitary equipment purchases.
Filtration Products
HVAC filters and air filtration products, including specialty items not stocked at major retailers.