How Do You Know What Size Furnace You Need?
Unfortunately, furnaces don’t last forever but have an expected service life of usually between 15 and 20 years. While it’s disappointing that you will have to reinvest in your furnace, at least it’s something you can plan to happen. When it is time to replace your furnace, you want to make sure you get the right size for your home. Here’s some information on why size matters and the variables to consider. Understanding Furnace Sizes The very first part of learning about furnaces is understanding how they are sized. When thinking about most HVAC systems, the size is measured in terms of BTUs, which stands for British Thermal Units. One BTU is the amount of energy required to raise one pound of water by one degree Fahrenheit. Commonly seen among furnaces is also the use of the term tonnes, such as 10.5 or 11.3 tonnes. This is simply another way of referring to BTUs, with one tonne equaling 12,000 BTUs. So if you need a furnace that produces 92,000 BTUs, that’ll be about 7.7 tonnes. Why Does Furnace Size Matter? A furnace that produces more BTUs produces more heat at once, which may seem advantageous. Common logic would say that...
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