Knowing your Furnace Part 1

Posted on: October 23rd, 2014 by Ashton Service Group

Forced Air Furnace

What different furnace efficiencies mean

If you are thinking of replacing your furnace, getting a high efficiency furnace can improve your home’s energy efficiency and save you money on your heating bills. Approximately 80% of gas-heated homes in British Columbia use a forced-air furnace for their heating needs.

Many homes may still have a mid-efficiency furnace (78%- 82%).  These mid-efficiency furnaces are no longer available to purchase in British Columbia if the manufacturer date is listed after January 1, 2010.  High-efficiency furnaces (90 %- 98%) are now the law for furnace replacement in existing homes and new construction.

High efficient furnaces produce 98 cents worth of usable heat for every dollar you spend with only two cents as wasted heat. Standard efficiency furnaces that are 20+ years old may be only 60% efficient giving you only 60 cents of usable heat for every dollar spent. Post 1990 mid-efficient models can achieve an annual efficiency of 78% to 82%, which is better than the standard efficient ones but still losing almost 1/4 of the heat generated that you are still paying for.

How forced air furnace works

A forced-air central heating system powered by a natural gas furnace uses ductwork and vents to distribute warm air throughout the house. Parts of the furnace include: an air filter, blower, heat exchanger/element/coil, and various controls.

A thermostat is used in the house to control the temperature which also lets the furnace know when to turn on and off. When the temperature of the air falls below the thermostat setting, the burners on the furnace will turn on to bring the temperature up to the setting. When the air temperature reaches the thermostat setting, the burners will turn off.

Comfortable and Improved Air Quality

Forced air brings in fresh air from the outside, creating better thermal dynamics and room circulation than if you had electrical baseboard heaters, which have no ventilation component.

The furnace’s air filtering system can eliminate airborne dust and improve indoor air quality. The sealed combustion in high efficiency models also protects indoor air quality by isolating the burner and flue from the home and not letting their by-products to be circulated throughout the home.

If you would like to replace your existing furnace with a more efficient, give Ashton Service Group a call at 604-283-2383 to set up a free in-home consultation.

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