Of these, two-thirds are fired by natural gas, while the rest are fired by oil or propane.
These systems are popular for a number of reasons, notably their ability to heat the house quickly and the fact that their ductwork can also be used for air conditioning during the summer months.
The second category of furnaces are known as "highefficiency" or “condensing” and range from 90- to 98-percent AFUE.
It’s better to investigate replacement solutions before your furnace kicks the bucket, so here’s a look at the most common heating systems available in Canada.
Forced-air furnace Two-thirds of all Canadian homes are heated with forced-air furnaces.
These units have a combustion chamber located below a heat exchanger that warms air that the blower circulates through heating ducts.
In addition, a forced-air furnace can be equipped to multi-task as an air filter, humidifier and/or fresh-air ventilator.
The downside of forced-air systems is that it can feel drafty because of the air blowing out of the vents, which also may circulate dust.
Currently, there are two types of furnaces on the market.
The first type is called “mid-efficiency,” and they are models that are about 80-percent efficient.
This means that for every dollar you spend on fuel, 35¢ to 40¢ goes up the chimney in the form of exhaust gases.
Since 1995, the minimum efficiency level for furnaces sold in Canada has been set at 78 percent.