Johnstone Supply

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About Johnstone Supply
Johnstone Supply in Houston operates as a heating equipment supplier serving contractors and homeowners across the metropolitan area. With a rating of 4.0 stars from 57 customer reviews, the business maintains consistent operating hours from 8 AM to 5 PM Monday through Friday, with Saturday availability until noon. The supplier offers an extensive catalog of HVAC equipment including single packaged units, split systems, mini-split systems, furnaces, evaporator coils, and air handlers, catering to both residential and commercial heating needs.
The Houston location distinguishes itself through specialized product offerings that address regional climate challenges. Customers benefit from access to variable capacity systems designed for Houston's humid summers, along with field-installed accessories and multi-zone configurations. The supplier maintains partnerships with major manufacturers providing extended warranty options, and offers commercial unitary equipment for businesses seeking integrated heating solutions. Their contractor-focused model ensures professional installers receive priority service and technical support.
Customer experiences highlight consistent praise for knowledgeable staff, particularly team member Chris, who reviewers describe as exceptionally helpful and efficient at identifying the right equipment for specific needs. Multiple customers note same-day service during urgent situations, with one reviewer noting quick turnaround for a residential furnace issue. However, some customers have raised concerns about return policies and weekend availability for exchanges, indicating that same-day returns may require advance planning.
What Customers Say
6 of 8 reviewers give 5-star ratings, with all positive reviews specifically mentioning helpful and knowledgeable staff. The 2 negative reviews cite return policy disputes and concerns about customer service responsiveness, while positive feedback emphasizes speed, professionalism, and product expertise.
Working Hours
| Sunday | Closed |
| MondayToday | 8 AM–5 PM |
| Tuesday | 8 AM–5 PM |
| Wednesday | 8 AM–5 PM |
| Thursday | 8 AM–5 PM |
| Friday | 8 AM–5 PM |
| Saturday | 8 AM–12 PM |
Services
Residential Heating Systems
Furnaces, split systems, and mini-split systems for home heating installation and replacement.
Commercial HVAC Equipment
Single packaged units and commercial unitary systems for business and multi-unit installations.
Variable Capacity Systems
Advanced heating systems with adjustable output for improved energy efficiency.
Air Handlers & Evaporator Coils
Indoor air handling components compatible with various cooling and heating configurations.
Extended Warranties
Manufacturer-backed warranty options available on eligible equipment purchases.
Multi-Zone Systems
Zoned heating solutions allowing temperature control in different areas of a property.
Field Installation Accessories
Parts and components for professional contractor installations.