wrote in message

It isn't hard to estimate the vent sizes needed to keep the bedrooms
65 F with a 70 F living room. Estimate the heat loss from the bedrooms
to the outdoors at 65 F... 880 ft^2 of R20 walls and 600 ft^2 of R40
ceiling would lose (65-30)(880/20+600/40) = 2065 Btu/h on a 30 F day.
And 2065 = 16.6Avsqrt(8')5^1.5 makes total vent area Av = 3.9 ft^2.

It was common to put floor vents above the stove and also at the other
end of the house. Ideally it was in a hallway. I'm told this is not
allowed by fire codes though.

We always have choices.

Nick


Once again Nick dazzles us with his math formula but fails to answer the
question.

Just where and how do you run these vents and the appropriate air handler?