You can turn any window in your house into a homemade solar window heater. It is recommended that you use a window that’s facing south. You could use an east or west facing window, but it won’t be as effective as a southern-facing one (assuming that you live in the Northern Hemisphere).
You’ll also need:
- a piece of corrugated cardboard
- black paint
- a paintbrush
- a knife or scissors
- The first step is to cut the cardboard to the size of your window. The corrugated cardboard must cover both top and bottom panes of the window. Be sure that the corrugation runs vertically, with the holes at the top and the bottom.
- Once you’ve cut it into size, paint the corrugated cardboard black. Be sure that you don’t get paint inside the corrugation holes. These are needed for proper air flow, once you put the cardboard in place. Let it dry before handling it again.
- Now take out the window screen. This will give your homemade solar window heater more space, and at the same time increase the amount of solar energy it can absorb, and will therefore increase its effectiveness.
- Once the paint dries, slide the black cardboard into the window, with the black side facing the outside. The cardboard should be between any storm windows and the inside glass panes. In this way, it will be protected from rain and dew.
- The bottom of the corrugated cardboard must be raised above the window sill. The distance should just be enough to allow air to flow into the corrugation holes. You can use anything to prop up the cardboard, as long as it doesn’t block the holes.
- Now that the cardboard is in place, open the window panes on the top and bottom – about one inch is fine. This opening will allow the air to flow in the bottom, go through the slots of the cardboard (where the air is heated) and then exit out at the top of the window and come back into the room. When the sun is out, open the windows, but remember to close them at night or else you’ll be letting cool air in.
If you think that the cardboard makes your room ugly, you can easily take the homemade solar window heater out and store it nearby. You can also decorate the cardboard with something attractive to make it look better. If someone is in serious need of saving on energy bills while keeping a room warm, this might be the most cost-effective solution for them, in which case the aesthetics of the matter will not be their top priority.
This simple yet effective homemade solar window heater might be the solution you’re looking for. It can help provide the heat you need, without causing you to spend more money on energy.