This HVAC fact often comes as a surprise to people. After all, what’s wrong with having a heating system in your home that’s more powerful than necessary? True, it costs more to buy a more powerful system, but it means you can always have the extra heat boost when you need it, and when you don’t need it, you can just turn it down.
None of this actually works out, because furnaces and heat pumps don’t operate with a throttle where you ramp up and down how much thermal power the heater puts out. Aside from wasting money on getting a heater that’s too powerful for your house, an oversized heater will create other problems that will cost you in both money and comfort.
Let’s take a closer look at why an oversized heating system is bad news for your home.