Air Conditioning Installation in Trenton & Quinte West

A central air conditioner is only as good as its installation. An oversized unit short-cycles, leaving your home humid and uncomfortable. An undersized unit runs constantly and still cannot keep up on the hottest days. Brandon sizes every AC system to your home's actual cooling load.

Johnston Mechanical installs RUUD and Mainline central air conditioning systems — reliable, energy-efficient units with SEER2 ratings that keep your hydro bills in check. Every installation includes proper refrigerant charging, airflow balancing, and a full commissioning check.

We also service existing AC systems — refrigerant checks, coil cleaning, capacitor replacement, and seasonal tune-ups to keep your system running at peak efficiency. If your AC is more than 15 years old, Brandon will give you an honest assessment of whether repair or replacement makes more sense.

Choosing the right AC system matters as much as the installation. A ductless mini-split is a good option for homes without existing ductwork, additions, or rooms that are difficult to cool with the central system. A central air conditioner paired with your existing furnace and ductwork is typically the most cost-effective choice for whole-home cooling. Brandon will walk you through both options and give you a straight recommendation based on your home.

Johnston Mechanical also handles refrigerant work on existing systems. If your AC is low on refrigerant, the leak needs to be found and repaired — not just topped up. Brandon locates the source, repairs it, and recharges the system to the correct specification. Simply adding refrigerant without fixing the leak is a temporary fix that will leave you calling again next summer.

Before any work begins, Brandon visits the site to assess your existing ductwork, electrical service, and available space for the outdoor condenser. You receive a written quote after that visit. There are no ballpark estimates over the phone and no surprises on the invoice.

All AC installations by Johnston Mechanical include a 5-year labour warranty. A 10-year labour warranty upgrade is available at the time of installation. Equipment manufacturer warranties apply on top of the labour warranty — Brandon will walk you through the coverage on the specific unit installed in your home.

Serving Trenton, Quinte West, Belleville, Brighton, Frankford, Stirling, and surrounding communities in Hastings County and Prince Edward County.