Passive Annual Heat Storage,
Improving the Design of
Earth Shelters (ebook)

Get the 1st chapter free

How to design a home with a

The ultimate in energy conservation.

Collect summer sunshine by cooling the house naturally, then restore that heat to keep it cozy and warm all winter.

Natural convective-powered ventillation system, brings in warm air in the winter and cool air in the summer.

No machinery or commercial energy needed. It's all natural.

2005 ebook up-date of the 1985 classic PAHS book, complete with 103 color illustrations.

More Information from the PAHS Education Page

by Prof. John N. Hait
160 pages, fully color-illustrated, e-book
2004 E-book Edition.
Price = $49.95 USD

Navagation Note: Following the full completion of your purchase, PayPal will take you to today's download page from which you can download this exciting electronic book right into your computer. If you encounter any problems please Contact Us right away.

Please note: Because of the inherent nature of electronic information, refunds will obviously not be available.