Heating
Furnace Installation in Trenton & Quinte West
A properly sized, correctly installed furnace is the foundation of a comfortable Ontario home. Johnston Mechanical HVAC LTD installs high-efficiency gas furnaces in Trenton, Quinte West, Belleville, and Brighton — Brandon Johnston personally overseeing every install as a TSSA certified gas technician (FS-R-52252).
Ontario winters demand a furnace that can keep up. Brandon sizes every system to the home — not to a price point — using proper heat-loss calculations to ensure you are not paying to heat a unit that is too big or shivering through one that is too small. Oversizing is one of the most common mistakes in residential HVAC, and it leads to short-cycling, uneven temperatures, and premature equipment failure.
Johnston Mechanical installs RUUD high-efficiency furnaces with AFUE ratings of 96% and above. That means 96 cents of every dollar you spend on gas goes directly into heating your home. Paired with correct ductwork and a quality thermostat, a properly installed furnace will run quietly and efficiently for 20 years or more. Brandon will walk you through the equipment options and give you a straight recommendation based on your home's layout and heating demands.
Every installation includes a full system commissioning — gas pressure check, heat exchanger inspection, airflow balancing, and a walkthrough so you understand your new equipment. Brandon is the one doing the work. No subcontractors, no handoffs mid-job.
Before any work begins, Brandon visits the site to assess the existing system, measure the space, and confirm the scope. You receive a written quote after that visit — not a ballpark over the phone. There are no surprises on the invoice.
Financing is available for furnace installations through Johnston Mechanical. If your furnace has failed unexpectedly, you should not have to choose between a warm home and your budget. Brandon can walk you through payment options during your site visit or over the phone.
Johnston Mechanical serves Trenton, Quinte West, Belleville, Brighton, Frankford, Stirling, Campbellford, and surrounding Hastings County and Prince Edward County communities. If you are not sure whether we cover your area, call and ask — Brandon is straightforward about service range.
Homeowners in Brighton and Belleville can find dedicated information about furnace installation and all HVAC services in their area on our Brighton HVAC page and Belleville HVAC page.
What's Included
- Site visit and written quote
- Load calculation and proper equipment sizing
- Removal and disposal of old furnace
- High-efficiency gas furnace supply and installation
- Flue venting and combustion air setup
- Gas line connection and pressure test
- Thermostat installation and programming
- Full system commissioning and safety check
- 5-year labour warranty (10-year upgrade available)
- TSSA certification documentation
Frequently Asked Questions
How long does a furnace installation take?
Most residential furnace replacements are completed in a single day — typically 4 to 6 hours. New construction rough-ins vary depending on the scope of ductwork required. Brandon will give you a realistic timeline during the site visit.
What brands does Johnston Mechanical install?
We primarily install RUUD high-efficiency furnaces, which are manufactured by Rheem and carry an excellent reliability record. We can discuss other options during your site visit if you have a specific preference.
What Our Customers Say
Alandra Emerson
October 19, 2026
Would 100% recommend Brandon, I called him in a panic with a newborn and a heat pump system that wasn't cooling our house in the middle of August, after another company gave us a ridiculous quote. He got it done for half and came the same day I called. Thank you so much.
Rijax Bloodmore
October 19, 2026
Realized my furnace went dead and made the call, had a technician in in a few hours and they found the issue had the part ordered and was installed the next day, professional kind and quick 10 out of 10 would use again.
Scott Marshall
October 18, 2026
We are new to our home, and weren't sure who to call for an outage with our home heating and cooling system. We found Johnston mechanical through an online search, and are very glad we we contacted them. They were honest, dependable, and fixed up our system in a professional manner. I highly recommend this business to others!
trevor roffey
October 17, 2026
Johnston Mechanical HVAC installed a radiant natural gas heater in my garage. They were professional, punctual, competitively priced and had a clean job site. Additionally, he took the time to answer my questions and explain the process. Would recommend
Get a Written Quote — No Obligation
Pricing is provided after a site visit. No made-up numbers over the phone — just an honest assessment from a TSSA certified technician.