4 Questions About Furnaces

Are you furnace shopping for your new home? Are you a homeowner that needs to maintain the furnace you already have, or maybe it’s just so old you’re wondering if an upgrade is necessary? Calgary furnace company can help answer your furnace questions:

1. What do numbers and ratings mean on furnaces?

Don’t let all of the percentages and acronyms scare you:

  • The Annual Fuel Utilization Efficiency (AFUE) rating refers to how energy-efficient the furnace is. The higher the number, the more energy savings you should expect. However, the AFUE may not be as efficient as listed if your home has poor insulation, outdated ductwork or thermostats, leaky windows, etc.
  • The SEER (Seasonal Energy Efficiency Ratio) rating indicates how efficient the unit cools in all the other seasons.

2. How often should my furnace be serviced?

Your furnace needs to be serviced annually. While a check up seems like another chore or just another bill, it can actually save you money in the long run. Many issues can be caught during an inspection — before they turn into majorly expensive issues.

3. What kind of furnace filter should I use?

Your furnace filter size will depend on your system, and you’ll find the filter dimensions on the filter cabinet. Pleated filters are more efficient. And, you’ll want to pay attention to a filter’s MERV rating. According to, “The higher the MERV rating, the better the filter is at blocking airborne pollutants. In fact, filters with ratings of 11 or 12 will block not only dust and pet dander, but can also block some types of microscopic viruses and fumes. This is because higher-rated filters have smaller holes so fewer particulates can get through.”

4. How often should I change my furnace’s air filters?

Generally, you can expect to change out your furnace’s air filter every 90 days. In Calgary, your furnace works hard for many months, so your filter may last 30-60 days.

A clogged filter makes your furnace work less efficiently, diminishing your home’s air quality. When your furnace filter needs replacement:

  • You’ll notice a build up of dust in your house (even after recent house cleaning).
  • The filter looks dirty.
  • There’s a musty odor when the furnace runs.
  • The furnace is firing up more often than normal.

Your local Calgary furnace company is here to answer all of your furnace questions. Let us know what else you want to know! Give us a call at Rapid Furnace Repair today!

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