Posted by Jeff on March 15, 2007, 5:54 pm
Nick always borders between maddening and very maddening. So I'll
point out the difference (in the window, not Nick). One is isolated low
mass (the 6hr) and the other is not. Presumably you'll close off the
isolated for 18 hours and the other you won't.
That wasn't as hard to figure out as most!
Posted by nicksanspam on March 15, 2007, 9:06 pm
I'd "close it off" automatically by closing a motorized damper or
turning off a fan in series with a heating thermostat in the living
space in series with a cooling thermostat in the sunspace.
They might gain 0.6x490 = 294 and lose 6h(70-26)1ft^2x0.35 = 92 Btu/day
for a net gain of 202 Btu/ft^2 on a Kalispell sunspace. On a 24-hour
living space, they would lose 24h(65-17.9)1ft^2x0.35 - 294 = 102 Btu/ft^2
on an average December day.