Expert HVAC Services Trenton Ontario
Johnston Mechanical HVAC LTD — Licensed and Insured serving Trenton, Quinte West, Belleville, and Brighton. Brandon personally oversees every job. No surprises.
Ask Brandon about current pricing and financing options.
About Us
On-Site, Hands-On, Accountable
Brandon Johnston is a TSSA certified technician who built Johnston Mechanical HVAC LTD from the ground up. He's on-site on most jobs, directly overseeing the work and personally handling the more complex projects — no shortcuts, no surprises. Based in Trenton, serving Quinte West, Belleville, Brighton, and surrounding Hastings County.
5.0 Rating
103 Google Reviews
Reviews
What Homeowners Are Saying
Real reviews from real customers across Trenton, Quinte West, and Belleville.
100+ Google Reviews
Recommended on Facebook
“Johnston Mechanical has been an exceptional small business. Brandon is professional, knowledgeable, and truly cares about his customers. Highly recommend!”
Sarah M.
“Brandon installed our new furnace and AC. He was on time, clean, and explained everything clearly. Great experience from start to finish.”
Mike T.
“Called for an emergency furnace repair in January. Brandon was there within hours. Honest pricing and excellent work. Will use again.”
Linda K.
“Had a heat pump installed last spring. Brandon sized it properly and the system has been flawless. Very happy with the investment.”
Dave R.
“Professional, punctual, and fair. Brandon walked me through every step of the installation. Couldn't ask for better service.”
Jennifer L.
“Replaced our old oil furnace with a high-efficiency gas unit. Brandon handled the whole job — permits, gas line, everything. Seamless.”
Tom W.
“Excellent work on our HRV installation. Brandon clearly knows his trade and takes pride in doing it right. Highly recommended.”
Carol B.
Our Mission
Why Homeowners Choose Johnston Mechanical
TSSA certified, licensed, and insured. Brandon personally oversees every job — no subcontractors, no surprises. Serving Trenton, Quinte West, Belleville, and Brighton.
What We Do
Complete HVAC Services for Trenton & Quinte West
Furnace installation, AC, heat pumps, boilers, ductwork, and more — all done by Brandon Johnston, TSSA certified gas technician.
Furnace Installation
High-efficiency gas furnaces sized and installed for Ontario winters.
Learn more →Air Conditioning
Central AC installation and service for Trenton and Quinte West homes.
Learn more →Heat Pumps
Cold-climate heat pumps that heat and cool efficiently year-round.
Learn more →Boilers & Navien
Hydronic boiler and Navien combi-system installation and service.
Learn more →Ductwork
New construction rough-in and retrofit ductwork for proper airflow.
Learn more →Tankless Water Heaters
On-demand hot water with Navien and other top brands.
Learn more →HRV Systems
Heat recovery ventilators for fresh, healthy indoor air.
Learn more →Gas Lines
TSSA-certified gas line installation for appliances and BBQs.
Learn more →Maintenance & Tune-Ups
Seasonal tune-ups to keep your system running at peak efficiency.
Learn more →Ready to Get Started?
Call or message Brandon directly for a free quote on furnace installation, AC, heat pumps, or any HVAC service.
Where We Work
Serving Trenton, Belleville, Quinte West & Beyond
Johnston Mechanical HVAC LTD is based in Trenton, Ontario and provides expert heating and cooling services across the entire Quinte region — from Brighton to Belleville, Frankford to Stirling, and everywhere in between.
Trenton
Home base
Belleville
Hastings County
Quinte West
Trenton area
Brighton
Northumberland
Frankford
Quinte West
Stirling
Hastings County
Campbellford
Northumberland
Tweed
Hastings County
Picton
Prince Edward County
Napanee
Lennox & Addington
Not sure if we cover your area? Give us a call — we're happy to help.