So much for that idea...
Nice warm spring day out, and in a regular house, open up all the windows and let the warm fresh air in.
This year - this house not a chance.
You see, the house has been slowly cooling off - despite my on and off - part time heating attempts - the lowest it has reached was a cool 43 F ( 6 degree C). Keeping in mind there is no full time heat source out there and it takes time to heat up 100 tons of concrete once it gets cold....
Now. For confirmation.
All my research is telling me, that it takes about 100,000 BTU's per hour to heat up the entire house by 1 degree. - want to warm it up by 3 degrees ? 100,000 BTU FOR THREE HOURS ....
Spent the weekend out there finishig off some details - one big time consumer is the wainscotting - burned through an entire 20 lb. Tank of propane - 500,000 BTU was used up ( estimated ) - the temperature in the house ? Is now 5 degrees warmer.
Now.... back to opening up the windows.... i can't.
Nice warm - HUMID day outside - say 60 % humidity outside with the house sitting at 45 % humidity - if any windows were opened right now, all that moisture would hit the cold concrete - condense and collect. My walls would be dripping wet.
I am already getting condensation on the OUTSIDE of my windows - warm moist air condensing when it touches the cold glass outside.
On the plus side - now that it is warm outside, every time i go out to work on the house - it is getting warmer in there, and i can stop heating it when it reaches about 65 F ( 18 C ) for the summer.
At that point, i have the option of opening the windows, but then if it gets up to 34 degrees this summer, i kinda want the house kept cool, so why loose the cool by opening the windows ?
Side note - 20 pound propane fill up ... 20 $ wainscotting all cut to size for dining room and long wall of master bedroom.