Heating above a garage
Breath more. But still probably need a combustion air intake for the stove.
Also. Will need a humidifier, If it did leak enough mot to need a combustion air intake. or your humidity could be below 10%.
Sealing the room with spray foam is teh right thing to do. Then a good wood stove with a direct combustion air intake.
Cuts down on wood use. And electric for heat when your not burning wood.
You can save a few pennies today. And throw quarters out the window every day for however long you own the place. or, spend a few pennies today. And save dollars everyday.