If you’ve got an older furnace or one that just doesn’t work right, you may need furnace installation in Eagle, ID. Furnaces older than 15 years old aren’t ENERGY STAR Certified, which is important when it comes to efficiency. Furnace replacement might be required if you’ve had your existing unit repaired but it keeps malfunctioning. There are multiple signs that may point to the need for a new furnace, which we’ll take a look at next.