Ductless mini-splits in Uxbridge
Ductless systems exist for one reason: some rooms cannot be fixed with more air conditioner. If a space has never held temperature, the constraint is usually the duct system, and adding capacity at the furnace does not change it. Metropolitan Heating and Air Conditioning has installed and serviced ductless equipment for Uxbridge households, on all makes and models, from a shop that has been running since 1979.
Call (416) 283-5698, Monday to Friday, 8:00 AM to 4:00 PM.
The room the ducts were never going to reach
A duct system is a pressure network, and air takes the path of least resistance. A branch added at the far end of a trunk, or run a long way to a room over a garage or into a converted attic, competes against shorter and straighter paths — and loses. Whatever static pressure is left at the end of that run is what the room gets.
The instinctive fix makes it worse. Closing registers elsewhere to force air down the starved branch raises total static pressure across the whole system, which reduces the blower's output and works the motor harder. Adding a bigger furnace or air conditioner does not help either, because the bottleneck is the duct, not the equipment.
A ductless head bypasses the argument entirely. It conditions the room from inside the room, with no duct in the path.
What a ductless system is, physically
An outdoor unit containing the compressor and one coil, one or more indoor heads containing the other coil and a fan, and a line set joining them: two insulated copper refrigerant lines, a control cable and a condensate drain, run together through a wall penetration around 75 mm across. Nothing else passes between them, and with no duct there are no duct losses.
Nearly all current ductless equipment is inverter-driven. Instead of switching a fixed-speed compressor on and off, an inverter varies compressor speed continuously, so the system settles at whatever output the room is actually losing. Long runs at low output hold temperature more steadily than short bursts at full capacity, and they remove more moisture, because dehumidification is a function of run time.
Single-zone, multi-zone, and what zoning buys
A single-zone system is one outdoor unit serving one head; a multi-zone system runs several heads from one outdoor unit. Each head has its own control, and that is real zoning: a bedroom can sit three degrees cooler than the rest of the house without anyone arguing with a thermostat in the hallway.
The trade-off on multi-zone is that capacity is shared. Worth asking about at the design stage is how the outdoor unit behaves when only one small head is calling, because a unit whose minimum output exceeds that head's demand will cycle rather than modulate — losing the main advantage of an inverter.
Additions, garages and finished basements
Adding conditioned floor area to a house creates a problem beyond the new room. The existing furnace and air conditioner were sized for the original space, and extending ductwork into an addition draws capacity away from everywhere else, so the whole house gets slightly worse.
Serving the new space with its own ductless system avoids that completely, and it is usually less invasive than routing new ducts through finished structure. The same logic applies to a garage workshop or a basement finished long after the house was built.
What installation involves
Placement decides how the system feels. A head is mounted high with a clear throw along the length of the room, and positioned so the airstream does not blow onto where people sit or sleep. The line set route is planned for the shortest practical run with the fewest bends. Condensate needs continuous fall to a drain, or a lift pump where gravity is not available — and a blocked condensate path is the most common ductless service call there is.
Outside, the unit gets a dedicated circuit and a disconnect, and sits on a pad or wall bracket high enough that snow and melt water clear the coil. Defrost water has to drain away rather than pool beneath it and refreeze.
Heating with ductless through an Ontario winter
A heat pump's heating output falls as outdoor temperature drops. Cold-climate models are built to hold a specified share of their rated capacity well below freezing, and the figure that matters is in the manufacturer's capacity table at the temperature you care about — not the nominal rating on the box. Defrost cycles, where the system briefly reverses to clear frost from the outdoor coil, are normal operation rather than a fault. Sizing for the coldest days is a design decision we work through with you, including what supplementary heat the house keeps.
Book ductless work in Uxbridge
Call (416) 283-5698 weekdays between 8:00 AM and 4:00 PM, or send us the details. See installation and replacement, ductless repair, heat pumps, and our service areas. Licensed and insured, all makes and models, installing Carrier, Lennox, Napoleon, Trane, Bosch and Daikin. Financing is available through Vista.