Johnstone Supply
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Claim This BusinessAbout Johnstone Supply
Johnstone Supply operates as a heating equipment supplier in Medford, Massachusetts, serving contractors and trades professionals across the greater Boston metropolitan area. The business maintains a 4.9-star rating derived from 23 verified customer reviews, reflecting consistent service quality recognized by professional buyers. Operating hours span Monday through Friday from 6:30 AM to 5:00 PM, providing daytime accessibility for tradespeople sourcing materials between projects. The Medford location functions as a regional distribution hub, connecting licensed HVAC contractors with manufacturer direct equipment and installation accessories.
What distinguishes this supplier lies in their inventory depth and commercial specialization. Their catalog features residential unitary equipment including gas furnaces, oil furnaces, and air handlers alongside evaporator coils, with extended warranty options available for purchase. Commercial offerings encompass single packaged units and split system configurations suitable for light commercial applications. The business also stocks manufactured housing-specific equipment and field-installed accessories, enabling contractors to complete installations without additional supplier stops. A cross-reference search tool on their website allows contractors to verify component compatibility across major manufacturer lines.
Customer feedback highlights specific team members who deliver measurable value. Reviewers repeatedly acknowledge Dave Darling from the inside equipment department as exceptionally knowledgeable, with one contractor partner specifically noting their expertise as the best in the industry. First-time visitors report receiving targeted assistance within minutes of arrival, describing the staff as quick and personable. Equipment availability emerges as another differentiator, with one reviewer stating if Johnstone cannot procure a specific component, no distributor can. These accounts collectively portray a supplier where technical product knowledge drives purchasing decisions.
What Customers Say
Seven of eight reviewers award five stars, with consistent praise for equipment availability and staff accessibility. Multiple contractors reference specific technicians by name, indicating ongoing business relationships rather than one-time purchases. No negative reviews appear in the sampled data.
Working Hours
| Sunday | Closed |
| Monday | 6:30 AM–5 PM |
| Tuesday | 6:30 AM–5 PM |
| Wednesday | 6:30 AM–5 PM |
| Thursday | 6:30 AM–5 PM |
| Friday | 6:30 AM–5 PM |
| SaturdayToday | Closed |
Services
Residential Split Systems
Complete split AC and heat pump systems for single-family homes and multi-unit residential buildings.
Mini-Split Equipment
Single-zone and multi-zone mini-split configurations for flexible zone-controlled installations.
Gas and Oil Furnaces
Natural gas and oil-fired forced-air furnaces with various efficiency ratings for replacement or new construction.
Air Handlers and Evaporator Coils
Indoor air handling units and matching coil assemblies for ducted split system pairings.
Single Packaged Units
All-in-one packaged systems combining compressor, condenser, and air handler for commercial roof-mount or ground-level applications.
Extended Warranties
Manufacturer-backed extended warranty programs available for purchase with equipment orders.
Commercial Equipment
Light commercial unitary equipment including packaged units and split systems rated for business applications.
Installation Accessories
Field-installed accessories including mounting hardware, refrigerants, and connectors for completing professional installations.