Ductwork Installation in Trenton & Quinte West

Most comfort problems in forced-air homes trace back to ductwork — undersized supply runs, missing return air, leaky joints, or poor layout. Brandon designs duct systems using proper Manual D calculations to ensure every room gets the airflow it needs. Getting the design right before any metal is cut prevents the balancing problems and hot-and-cold rooms that plague poorly planned systems.

For new construction in Trenton, Quinte West, and Brighton, Johnston Mechanical handles the full rough-in — trunk lines, branch runs, supply boots, and return air grilles — coordinated with your framing schedule. We work directly with builders and homeowners to ensure the duct layout suits the floor plan and the mechanical room is set up for long-term serviceability.

For existing homes, we fabricate and install custom sheet metal ductwork to extend or improve your current system. Whether you are finishing a basement in Belleville, adding a room addition in Brighton, or converting from oil to gas in Quinte West, Brandon can design a duct solution that works with your home's existing layout and minimizes disruption to finished spaces.

All ductwork is sealed with mastic or UL-listed tape — not standard duct tape, which dries out and fails within a few years. Proper sealing reduces energy loss significantly. Studies consistently show that leaky ductwork in unconditioned spaces like attics and crawlspaces can waste 20 to 30 percent of the air your furnace or air conditioner produces before it ever reaches the living space.

Return air is one of the most overlooked parts of a duct system. Many older homes in Trenton and Quinte West have a single central return that cannot keep up with a modern high-efficiency furnace. Brandon assesses your return air capacity as part of every duct evaluation and adds return air where needed to prevent negative pressure, noise, and comfort issues throughout the house.

Ductwork also plays a critical role in the performance of heat pumps and central air conditioning. An undersized or leaky duct system forces your equipment to work harder, shortens its lifespan, and drives up your energy bills. If you are planning a new furnace, heat pump, or AC installation, having Brandon assess your ductwork at the same time is the most cost-effective approach.