Johnstone Supply

Is this your business?
Claim your listing to verify your info and earn a verified badge.
Claim This BusinessAbout Johnstone Supply
Johnstone Supply operates as a Braintree-based heating equipment supplier serving contractor clients across the greater Boston metro area. With a solid 4.6-star rating from 12 client reviews, the company maintains weekday operations from 7 AM to 5 PM, closing evenings and weekends. This distributor stocks an extensive catalog spanning furnaces, split systems, mini-split configurations, air handlers, and evaporator coils, positioning itself as a one-stop resource for HVAC professionals seeking equipment and installation accessories.
The supplier differentiates through its breadth of residential and commercial inventory alongside extended warranty programs. Product lines include variable capacity systems, multi-zone configurations, and manufactured housing units, covering brands such as Lennox and other major manufacturers. Field-installed accessories and single-packaged units round out an offering that keeps contractor crews moving without sourcing multiple vendors.
Reviewers consistently highlight Kevin and Chris as team members who deliver responsive, knowledgeable support. Mike Donegan of Ecco Air Solutions specifically praised their same-day availability and price competitiveness during peak demand seasons, noting the team's willingness to accommodate tight project timelines.
What Customers Say
Four of four detailed reviewers awarded 5-star ratings, citing competitive pricing, product availability, and knowledgeable staff. Reviewers mention specific team members Kevin and Chris by name, with one noting exceptional responsiveness during same-day emergencies.
Working Hours
| Sunday | Closed |
| Monday | 7 AM–5 PM |
| TuesdayToday | 7 AM–5 PM |
| Wednesday | 7 AM–5 PM |
| Thursday | 7 AM–5 PM |
| Friday | 7 AM–5 PM |
| Saturday | Closed |
Services
Furnace Sales & Distribution
Stocking gas and oil furnaces for residential and light commercial replacement projects.
Split System Components
Supplying evaporator coils, air handlers, and matching outdoor units for system installations.
Mini-Split Inventory
Single-zone and multi-zone ductless systems including variable capacity options.
Commercial HVAC Units
Single-packaged commercial units and field-installed accessories for contractor crews.
Extended Warranty Programs
Available manufacturer-backed extended coverage on equipment purchases.
Installation Accessories
Professional-grade mounting hardware, refrigerants, and connecting components.
Manufactured Housing Systems
Specialized HVAC units designed for manufactured home applications.