Tag: furnace efficiency

One of the first steps in saving energy around your home especially when it comes to heating and cooling is to understand furnace energy efficiency ratings. Anytime you purchase a new furnace you should consider the furnace efficiency rating before making a final decision. In essence, the efficiency rating of a furnace helps you to decide how much it will cost you to heat your home on an annual basis. A higher rating indicates that a more substantial amount of heat is delivered for the amount of energy being used.

Annual Fuel Utilization Efficiency

In addition, it is vital to consider the cost of the fuel being used for energy. For example, electric furnaces are considered to be some of the most efficient available today. That said sometimes the cost of electricity does not allow for the economical use of an electric furnace. Furnace efficiency is typically measured as the Annual Fuel Utilization Efficiency rating. This is sometimes referred to as the AFUE rating. It indicates how much heat a furnace will produce with a given amount of energy usage.

Converts Into Heat That is Able to Warm Your Home

For an example, if a furnace is rated at 90% AFUE, then 10% of the energy being used is lost to inefficiency. The end result is that approximately 90% of the energy being used actually converts into heat that is able to warm your home. Keep in mind that this measurement does not take into account any potential heat loss that may occur through ductwork or leaks. As a general rule ducts in the attic or crawl space can lose close to 40% of heating efficiency if not properly installed or maintained.

If there is a Continuous Pilot Light You Can Expect Low Efficiency

As a note, the government requires that all modern furnaces have an AFUE rating clearly visible on the product. That said there are some older systems that do not have ratings, or the information has simply been removed over time. In older systems if there is a continuous pilot light you can expect low efficiency. Most experts in the industry recommend replacing systems that are more than 20 years old as a way to lower energy costs. As a rule condensing furnaces can be up to 10% higher in efficiency ratings. Talk with your expert HVAC professional in Skagit Valley to determine which system will suit your needs the best.

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