By: FCAvery On: Tue Dec 29, 2009 4:37 pm
I have to agree with Pete69. Every house is different. I have a small heating and air conditioning business. I wouldn't recommend a certain size stove without doing a heat loss on the structure. This takes into account how the building is contructed, size, orientation and insulation, (composition, size and orientation of windows), door size and composition, etc, etc.
All these factors combine to determine the amount of heat required and speed it escapes from your building. Heat always travels from hot to cold.
To give you an example - I have a 32' X 64' X 10' Pole building (2048 sq ft or 20,480 cu ft, if the walls were 8' - 16,384 cu ft) . This building is well insulated R19 in the walls and R58 in the ceiling. Your ceiling is going to be the greatest heat loss. The building has 13 (3'X5') insulated windows, 1 - 6' terrace door, 1 - 3' pedestrian door, 2 insulated garage doors (16' x 8' and 9' X 8') and 2 insulated 4' X 4' sky lights. Its on a concrete slab thats has the end insulated and 4' of the perimeter insulated with R10. This building has a heat loss of approximately 62,000 BTU. I purchased a D S Machine circulator stove rated a 96,000 BTU. I've set the stove thermostat at midrange. This unit has been keeping my building between 65 F and 72 F. The inside temp varies with outside temp because I'm not adjusting the unit thermostat to compensate for the outside temp. The greater the difference between the inside and outside temps, the greater the heat transfer to the colder area. Insulation just slows down the rate of heat transfer. I'm burning approximately 20-25 lbs of coal per 24 hr period. I shake the ashes in the morning and evening. I've been keeping a log of inside temp, outside temp, coal used, t-stat setting, ashes emptied, etc. I want to know how much coal to order for this stove in 2010. I'm assuming we'll still be able to buy coal then, with the current administration, it may be outlawed. Hope this helps.
Fred A