Some furnaces are past the point of repair
A furnace is usually due for replacement when the heat exchanger is cracked, when a major part fails on an old unit, or when the same repairs come back every winter. A cracked heat exchanger can let combustion gases, including carbon monoxide, into the air the blower moves through the house. That furnace gets shut off, not patched.
Other signs are slower. Rooms that never warm up. A furnace that runs nonstop in January. Gas bills climbing at the same thermostat setting. Rust or water around the cabinet. If a repair still makes sense, the technician tells you, so you can weigh it against a new unit. The guide on what decides the price of a new furnace explains why the numbers vary from house to house.
Most Norwood furnaces are replacing an oversized unit
In the 2016 Census, 235 of the 560 occupied homes in the Norwood population centre were built in 1960 or before, and another 165 from 1961 to 1980. Many older village houses around Keeler's Mill started on wood or coal and were converted to oil, then gas. The furnace in the basement is often a replacement for a replacement, and often far bigger than the house needs.
An oversized furnace heats fast, shuts off and starts again. That short cycling wears parts, leaves cold corners, and pushes more air than added-on ductwork can carry, so the system runs loud. Copying the old size repeats the mistake.
The technician works out the heat loss of the house itself: walls, windows, insulation, air leaks, the rooms you actually use. The ducts are checked too. Ducts added during a conversion are often undersized or poorly sealed, and sealing them or adding a return can do more for comfort than a bigger furnace. On very old ducts or pipe wrap, the technician watches for material that may contain asbestos and tells you before anything is disturbed.
An old chimney may need a liner when the furnace changes
A high-efficiency condensing furnace vents through plastic pipe in the side wall, not up the chimney. If a gas water heater stays on the old chimney, it now vents alone up a flue sized for a much larger fire. It may not draft properly, and the flue can run cold and wet inside.
On every quote the technician looks at the chimney, the flue connections and what else uses them. If a liner is needed, it appears on the written price as its own line, so you see it before you approve anything. Gas work follows the CSA B149.1 Natural Gas and Propane Installation Code, adopted in Ontario under Ontario Regulation 212/01. Work is performed by TSSA-certified gas technicians.
Side-wall vents have to clear Norwood snow
Environment Canada's 1981-2010 normals for the Peterborough A station record 151.2 cm of snow a year, 40.0 cm of it in January, with snow depths up to 71 cm in March. Drifts like that bury intake and exhaust pipes, and a high-efficiency furnace shuts itself off when they are blocked.
The vent location is chosen before the price is written. Away from the side of the house where snow piles up, above the likely snow line, and at the clearances the installation code sets from windows, doors and the gas meter. Where the wall is low, the pipes are raised. The condensate drain is routed and trapped so it will not freeze, because a frozen drain is a common no-heat call in the newer homes.
Newer Norwood Park homes need setup, not size
The first Norwood Park phases off Albine Street and the newer Phase 4 houses and townhomes are tightly built, with small duct runs and ventilation units that bring in fresh air. When these systems give trouble, it is usually setup: the wrong size from the start, airflow never balanced, or ventilation filters left to clog.
A new furnace in one of these homes is matched to the duct system, and airflow is measured and adjusted at start-up. Some owners here also look at a cold-climate heat pump, or a hybrid set-up with the gas furnace as backup. The technician can price both side by side.
A replacement runs from house check to first start
The technician visits, measures the house, inspects the ducts, chimney and venting, and asks what you have now and what bothers you about it. You get a written price listing the furnace, venting, condensate drain, any liner and any duct work. Nothing is fitted until you approve it. Rebate programs change, so check the grants and rebates guide before you decide.
On install day the old furnace is disconnected and removed. The new one is set, connected to gas, venting, condensate drain and ducts, then tested under load. The technician shows you the filter, the vent pipes outside and the condensate trap.
Register the furnace with the manufacturer and keep the installation paperwork. Most manufacturer warranties expect yearly maintenance. And check your carbon monoxide alarms: the Ontario Fire Code requires a working one next to each sleeping area in a home with a fuel-burning appliance.