Heating & Cooling

Ductless Heat Pump Installation in Trenton & Quinte West

A ductless mini-split heat pump delivers efficient heating and cooling to any room — without ductwork. Johnston Mechanical HVAC LTD installs TOSOT and GREE ductless systems across Trenton, Quinte West, Belleville, and Brighton. Brandon personally oversees every installation.

Ductless heat pumps are one of the most versatile HVAC solutions available. A single outdoor unit connects to one or more indoor wall-mounted heads, each controlled independently. That means you can heat or cool a sunroom, a basement, a garage, a home addition, or a bedroom that your central system never quite reached — without tearing into walls or running new ductwork.

Johnston Mechanical installs TOSOT and GREE cold-climate ductless systems. Both brands are engineered for Ontario winters, with rated heating capacity down to -25 degrees Celsius. TOSOT and GREE are manufactured by the same parent company (Gree Electric) and represent two of the most reliable ductless product lines available in Canada. Brandon will recommend the right model and configuration for your space during the site visit.

Multi-zone ductless systems allow one outdoor unit to serve multiple indoor heads — each in a different room, each with its own thermostat. This is a practical solution for homes that need comfort control in several areas without the cost and disruption of installing a full ducted system. Brandon sizes multi-zone systems carefully to ensure the outdoor unit is not over- or under-matched to the combined indoor load.

Ductless systems are also a strong choice as a supplement to an existing forced-air system. If your furnace and central AC handle most of the house well but one or two rooms are always too hot in summer or too cold in winter, a single-zone ductless unit targeted at those rooms is often the most cost-effective fix. No ductwork modifications, no balancing headaches — just a dedicated unit for the problem area.

Installation is straightforward: the indoor head mounts high on a wall, a small hole through the exterior wall carries the refrigerant lines and electrical to the outdoor unit, and the outdoor unit sits on a pad or wall bracket. Most single-zone installations are completed in a day. Brandon will walk you through placement options during the site visit to ensure the indoor head location makes sense for the room's layout and airflow.

Before any work begins, Brandon visits the site to assess the space, confirm electrical capacity, and determine the best location for both the indoor head and the outdoor unit. You receive a written quote after that visit. There are no surprises on the invoice.

Johnston Mechanical serves Trenton, Quinte West, Belleville, Brighton, Frankford, Stirling, Campbellford, and surrounding Hastings County and Prince Edward County communities.

What's Included

  • Site visit and written quote
  • TOSOT or GREE ductless unit supply and installation
  • Indoor wall-mounted head installation
  • Outdoor unit installation on pad or wall bracket
  • Refrigerant line set and electrical connection
  • Refrigerant charge and leak check
  • Full system commissioning and test
  • Homeowner walkthrough and remote programming
  • 5-year labour warranty (10-year upgrade available)

Frequently Asked Questions

Can a ductless heat pump heat my space in a Trenton winter?

Yes. TOSOT and GREE cold-climate models are rated to maintain full heating capacity down to -25 degrees Celsius — well below the coldest temperatures recorded in the Trenton and Quinte West area. These are not standard ductless units; they are engineered specifically for Canadian winters.

How many rooms can one outdoor unit serve?

Multi-zone systems can connect one outdoor unit to two, three, or four indoor heads, each in a separate room. Each head operates independently. Brandon sizes the outdoor unit to match the combined load of all indoor heads — proper sizing is critical to efficiency and comfort.

How disruptive is the installation?

Minimal. The indoor head mounts on a wall, a small core hole through the exterior carries the lines to the outdoor unit, and the outdoor unit sits on a pad or bracket. Most single-zone installations are completed in one day with no drywall work required.

What Our Customers Say

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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.

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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.

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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!

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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

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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.