2011laramie
Well-known member
How does one calculate the btus required for an air exchange? Ive read that a room should have anywhere from .2 to 2 full air changes per hour. So does that mean all air is just exchanged throughout the building or that the air is exchanged with fresh air and old air is exhausted out?
Im doing my heat loss calcs for my garage with a suite. Using the effective R value of a 2x6 wall then adding R5 for outside styrofoam. and doing windows and doors separately and adding it all together. I get a decent number that makes sense. But when I add a .2 air exchange of the volume of a 44x24x16 building i get way higher numbers. My house is basically the exact same size and has a lennox 66000btu furnace and it does just fine in the coldest of Alberta winters.
Im doing my heat loss calcs for my garage with a suite. Using the effective R value of a 2x6 wall then adding R5 for outside styrofoam. and doing windows and doors separately and adding it all together. I get a decent number that makes sense. But when I add a .2 air exchange of the volume of a 44x24x16 building i get way higher numbers. My house is basically the exact same size and has a lennox 66000btu furnace and it does just fine in the coldest of Alberta winters.