Well It has been about a month we have been using our leisure line le direct vent coal stoves and I have to say we are very impressed with the stoves. we put one in our mill and my son and I have one for our homes. still tweaking the coal trol to the heat loss factor. in my home. this is all new to me but i am warm and saving money..... I am in an old farm house with 6 rooms downstairs and 4 bed rooms up stairs.