Regulation of Temperature in a Confined Space.

See also:

• http://www.auto-solarvent.com/engelsk/engelsk.htm Makers of Univent
• http://www.charleysgreenhouse.com/catalog/index.cfm?page=_ProductDetails&ProductId=3513 Replacement cylinder is half price.
• http://www.charleysgreenhouse.com/catalog/index.cfm?page=_ProductDetails&ProductId=3515 No electricity needed. The vent opener uses heat to open it and closes when it cools. The piston uses bee's wax as the hydraulic material. Can be adjusted in 1° F increments for opening temperatures between 60° F and 77° F. Full opening of 18" is reached at 86° F. Lifting capacity is 15 lbs. 3 to 4 year lifetime.
• http://www.discovercircuits.com/T/temp-cont.htm Temperature control circuits
• http://www.e-insite.net/ednmag/archives/1997/110697/23di_05.htm Bang-bang thermostat is simple and efficient
• http://www.ibiblio.org/london/renewable-energy/solar/general-info/msg00217.html Some modular sheds with solar closets

Solar Power, Heating and Cooling

Heliostat converts solar concentrator into sun shade?

See:

• /techref/microchip/temp.htm PIC temp