For the love of never ending strings...
HVAC Guy, Is it true that the Norwegians were the first to cut holes in the roof of their shelters in order to let out the smoke from their fires? Since huts are typically shipped w/o holes on the roof, aren't these added holes adversely effecting the flames. By cutting these holes didn't they sacrifice heating efficiency for "safety" reason? Since wood was much cheaper then, I'm sure it was not real concern. With the high cost of wood these days, should a HVAC Guy like yourself close these holes...? Just want to know what HVAC techs were doing thousands of years ago.
And please, before you tell everyone your right & we're wrong, take a bath w/your toaster...
geothermaljones