Well my 3 tents are basically heating my house have the thermostat set at 21 and it hasn't come on yet lol. It does at night when all the lights are out. But not very often. I have a fan in the doorway of the spare room that just blows the hot air straight down the hallway lol.
Smart thinkin’. Believe it or not i exhaust down through the floor in my flower room and duct it out right under the living room.
1515 watt heater it is. Saves me about a tank (400gallons) of propane every year.
In summer it goes to the chimney where the old wood stove was in the basement.