With the use of passive solar heating technology, our solar window heaters can produce output temperatures between 100 and 135 degrees depending on the air temperature in your home, and the amount of sunlight the heaters recieve.
Southern exposure to the sun is prefered, but is not absolutely necessary. The easy way to look at is the more sun the collector get the more heat they will produce. I personally have units on 3 sides of my home. One side catches the sun in the morning, the back of my house gets sun most of the day, and the other side gets several hours in the afternoon. On a fairly sunny day my home will stay between 68 an 75 degrees without the use of my electric heat pumps.

 Our solar window heaters come in a standard 24" wide unit set at a 90 degree angle to fit most windows and  
  can be installed on any floor of your building. In addition as seen below we also make custom models.
Here below you can see an order being picked up by the customer. This order is (4 ) 30" wide by 54" long units
 set at a 45 degree angle. These 4 units when installed, and with good sunlight will produce enough heat to     
 keep most homes in a temperature range of 68 to 75 degrees during daylight hours without the use of your
 conventional heat source.

If you happen to be the do-it-youselfer we also make kits that you can assemble. The kits contain all the components of the heater pre-cut all you will need to assemble the heater is a few items from your local hardware store which will cost around ten dollars, plus the cost of the kit itself, and a few hours of your time to assemble. The kits also make a great science project for kids.