Northern Tool offers the SolarSheat 1000GS Solar Fan Assembly for $899.99. Coupon code "254876" cuts it to $879.99. With $65.49 for shipping, that's tied with our mention from last week, $420 off list, and the lowest price we could find. It features a 1,000-watt solar thermal air collector, duct kit, wall mounts, thermostat, and fan assembly with 15-watt PV panel.