Things are slowly starting to get back to normal. You made plans to meet with some friends for a small Valentine’s Day celebration. Nothing big, just catching up, exchanging some candy, and enjoying the ability to spend time together face to face.
As you are making your preparations though you notice that you’ve started to shiver and folding those cheesy cards has gotten harder because your fingers are frozen. You check the thermostat and see that the temperature setting is where it should be. You can hear the heater running too. So where is all that warm air?