Why Your Furnace Can't Keep Up in Extreme Cold Weather

On those days where the mercury drops way below zero, you might find that the house has trouble maintaining the temperature you set due to the extreme cold.

Cold weather could pose risk to your home

Why Is There Ice On The Inside Of Your Windows & What To Do

8 Reasons Your Heat Won't Turn On

The science of cold

3 Reasons Your AC Stopped Working Over the Winter

As Heat Pumps Go Mainstream, a Big Question: Can They Handle Real Cold? - The New York Times

Why Is My Heater Blowing Cold Air?

The science of cold

Is Your Furnace Not Heating Or Blowing Warm Air? - Here's What To Do

Does Your Heat Pump Have Auxiliary Heating?

What Is the Emergency Heat Setting?