Links

www.builditsolar.com for lots of good information on do it yourself solar and energy saving ideas.

www.ngdc.noaa.gov for correction to compass north. World magnetic model.

www.retscreen.net for free software on renewable energy design and payback.

www.solar-rating.org for SRCC ratings of collectors and systems. These ratings may be required for tax credits. Also good information on collector performance.

www.ases.org for the American Solar Energy Society.

www.discountspacovers.com Custom made spa and hot tub covers for all shapes and sizes. A tight fitting, high R-value cover can save a lot of energy.