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Office of Energy Efficiency Links


Personal: Residential


When you’re in the market for new heating products, it pays to learn all you can about them first. With the proper facts in hand, you can make choices that will save you money and help protect the environment.

The EnerGuide rating and ENERGY STAR symbol can help you identify the most energy-efficient products available in Canada. The items in the list on this page will direct you to further information about specific areas related to each subject.

Combination Systems


Wood-electric combination furnaces are common in rural areas. These are wood furnaces that contain built-in heating elements that are activated only when the wood furnace cannot meet the heating requirements of the home. Electric baseboard heaters can also be used to supplement a central wood furnace, a wood-oil combination furnace, or a wood stove.

A combination wood-electric furnace

 A combination wood-electric furnace

Carbon Monoxide Detectors

Because modern houses are more airtight and have more powerful air-exhausting systems, there is a greater chance that combustion products – sometimes containing deadly carbon monoxide gas – will linger inside your house and build up to dangerous levels. A certified carbon monoxide detector located close to fuel-fired appliances (such as furnaces, fireplaces, space heaters, wood stoves and gas or propane refrigerators) will signal a potentially dangerous situation that must be corrected immediately.

Symptoms of low-level carbon monoxide poisoning are similar to those of the flu – headaches, lethargy and nausea. If your carbon monoxide detector goes off, leave your home immediately, call your gas distribution company and seek medical attention.

If you operate a conventional wood-burning fireplace (which can often leak carbon monoxide), install a carbon monoxide detector near the fireplace.


An oil-electric combination system consists of an oil furnace with factory-installed electric heating elements. The electric elements supply a large part of the heating requirements, with the oil burner kicking in only during very cold weather.

An oil-electric combination furnace

 An oil-electric combination furnace