In the home I am in, there was an old stove pipe vent hole in the back pantry. It was letting in cold air, so I fixed it with just 10 minutes of work. If this is an issue in your home, you can too.
I stuffed a bag of old T-shirts in the hole, and covered with three paper plates just tacked up with push pins. Done and done!
I know you can get covers but why waste the money? N-JOY!
Source: Nope. Just keeping the house warm with no money out of pocket!
Thanks. I have been "doing things on the cheap" my whole life. You should see what I can do with duct tape!!
You could just put duct tape over the hole, instead of the paper plates, too.
You do realize you need to cover the hole at the top? You have just built a nest for squirrels.