Residential and commercial HVAC
Don Dematagoda has spent over 20 years installing, repairing and maintaining furnaces, air conditioners, heat pumps and water heaters in homes and commercial buildings.
Don also handles energy-efficiency upgrades and planned replacements. Completed projects are documented across Southern Ontario; ask whether Don serves your area.
Show a system
Showing all systems.
Heating
The furnace in the basement heats air and a blower pushes it through supply ducts to each room. Return ducts bring cooler air back to the furnace. The thermostat tells it when to run.
Cooling
The outdoor condenser and the indoor coil on top of the furnace are joined by a refrigerant line set. The furnace blower moves the cooled air through the same ducts. A heat pump uses the same layout to heat as well as cool.
Hot water
The water heater keeps hot water ready, or heats it on demand if it is a tankless unit. Hot-water lines carry it up to the kitchen sink and the bathroom.
Find the right help
Pick the problem that sounds closest. Each one leads to what usually causes it and what Don can do about it.
Completed projects
Don’s HVAC Services completed rooftop air-conditioning work for a commercial building in Oshawa. Rooftop units serve the building from above, so the work involves roof access and coordinating with the people who manage the property.
A heat pump was installed in a Brampton home. A heat pump moves heat into the house in cold weather and out of it in warm weather, so one system covers both heating and cooling.
A tankless water heater was installed in an Etobicoke home. Tankless units heat water as it is used instead of keeping a full tank hot, and they mount on the wall.
Equipment
Gas and electric furnace repair, maintenance and replacement for homes and businesses.
Gas furnaces · Electric furnaces · High-efficiency furnaces
Furnaces: repair, maintenance and replacement
Central and ductless air conditioning installation, repair and seasonal maintenance.
Central air conditioners · Ductless mini-splits · Rooftop units (commercial)
Air conditioning: repair, maintenance and replacement
Tank, tankless and heat-pump water heater installation, repair and maintenance.
Tank water heaters · Tankless water heaters · Heat-pump water heaters
Water heaters: repair, maintenance and replacement
Air-source heat pumps for home heating and cooling, including pairing with an existing furnace.
Air-source heat pumps · Heat pumps paired with a furnace
Heat pumps: repair, maintenance and replacementCommercial
Don works on commercial buildings as well as homes. If you look after an office, a retail unit or a multi-unit building, describe the equipment and how to reach it, and Don will follow up to arrange a visit.
Rooftop air-conditioning units, gas lines, furnaces and water heaters serving offices and other commercial buildings.
Rooftop and mechanical-room work means planning roof access and entry with whoever manages the property.
Visits are arranged with the property contact, and Don confirms each appointment directly.
Founder
Don founded Don’s HVAC Services and has over 20 years of experience with heating, cooling and hot-water equipment. He installs, repairs and maintains furnaces, air conditioners, heat pumps and water heaters, and helps owners make their systems more efficient.
His work covers both family homes and commercial buildings. If something isn’t working, or you are thinking about new equipment, call and talk it through with Don.
Questions
A few checks are safe for anyone to do:
Don’t open the furnace or work on gas or electrical parts. If those checks don’t help, call Don. If you smell gas or a carbon monoxide alarm sounds, leave the building first and call your gas utility’s emergency line or 911 from outside.
It helps to know roughly how old the current equipment is and what type it is (for example a gas furnace, central air conditioner or tank water heater), a clear photo of the model plate or sticker, and the approximate size of the home or space. Then request an estimate or call.
Yes. Documented commercial work includes a rooftop air-conditioning unit for a building in Oshawa and a gas line for an office in Hamilton. See commercial HVAC services.
Completed projects are documented in Bradford, Brampton, Etobicoke, Hamilton, Mississauga, North York, Oshawa, Richmond Hill and Waterloo, all in Southern Ontario. Current service areas are not listed yet, so ask whether Don serves your area when you call or send a request. More on the service area page.
Call 647-719-7319, or send a request with the online form. A form request is not an automatic booking: Don reads it, follows up with you, and confirms an appointment time with you directly.
Contact
Call to describe what’s happening, or send a request and Don will follow up to confirm the details.
