When the temperature drops, furnaces work overdrive and inevitably break, keeping repair businesses busy.
The holidays can be a good time to be busy. Extra money never hurts this time of year, but for those who are called on to repair a broken furnace, it can mean a lot of time at work away from home and family.
One businesses says the work day can last nearly 18 hours sometimes, especially when jobs take one to three hours to complete.
But the people who spoke with 27NEWSFIRST say it's worth it to bring someone a warm home for the holidays.
Some people, like a construction crew we spoke with, say they would rather be inside on a cold day but have little choice. They do say the humidity and frost, not the cold, make some jobs harder than others.