Passive Solar Heating, like you described camju, is free and incredibly efficient when properly designed...and when coupled with a thermal mass (such as masonry and earth - think caves) to take advantage of thermal lag, and a properly sited building (depending on the local micro climate and topology) you can heat and cool a significant part of the year without any real supplemental energy usage. In the winter, the sun heats an interior thermal mass during the day via southern exposure, the mass then releases heat throughout the cool down stage during the night, maintaining a relatively steady temperature, when the sun comes back up, it just repeats. In the summer, the mass acts as a heat sink during the day, absorbing heat from the heated interior air, and releasing that heat during the night. Doesn't work in every climate, but Passive solar heating coupled with ventilate cooling, in a temperate climate similar to many of the upper United States, is a tried and true method that was discarded with the advent of cheap fossil fuel but remains a viable option for as far as I can see.
We should work with nature...not against it... living spaces on the leeward side - glazing along southern exposures with deep overhangs to mediate solar gain throughout the seasons, proper siting with cross ventilation contiguous with the prevailing breezes...Hopefully one day I can build my own place to try and synthesize all the interesting ideas that are out there.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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