Finally, an affordable all-year system for both solar heating and ventilating your home. It supplements your conventional heating and cooling system and takes a big bite out of both your winter fuel and summer electricity bills. Designed for simple wall or window mounting, this all-in-one module easily installs leaving your roof intact. No need for thermal storage—lower cost and complexity, higher efficiency. AutoVent, a patented integral two-valve air handling control changes between the three operating modes: solar heating, ventilation cooling, and cool air conservation. It senses inside and outside temperature and adapts automatically for hands-off all-year operation. The new, Selective Matrix solar absorber presents more than 55 times the surface area of a flat plate collector. You get efficient solar heating in cold weather (72% ASHRAE eff.), whole-room ventilation in warm weather, house-shutting in hot weather, and protection against life-reducing collector overheating. Compatible with AC the unit ventilates on demand as long as the outside temperature is comfortable but won't pull hot air into the house or cool air out of the house. The two models typically save 55 or 70 gallons of heating oil and up to 120 or 150 kWh of electricity per year. Standard quiet 120 vac fan or optional, integral PV panel and DC fan for off-grid operation.Longer than usual delivery time

Hydronic heating—the most comfortable way to heat your home. This book explains and simplifies designing your own system using Kitec tubing (the kind we sell at Jade Mountain). Size a system to your local conditions using regional climate tables. Also gives construction details. A must-have if you're serious about using hydronic heat.