While we know the advantages of solar power, there is little disagreement on the fact that going passive solar is the most manageable of them all. There are no moving parts and there is no device to break down. But the DIY lover in all of us will always look to our own creative streaks to ensure that the cost of turning to solar power is even lower, and DIY passive solar heating is as low-cost and manageable as they come.
The principles of passive solar heating are that only natural factors are used to heat an area, with convection, conduction and radiation carrying heat through a room. While the system will generally depend on the materials used in a room – for example, the floors, wall and ceiling, as well as the window glass – to be effective, smaller passive solar systems can prove capable of heating a smaller space.
When it comes to a workshop or garage, the heater might not be any larger than the size of a pain of glass in a door. Surprisingly, all you’d need to make one is a few dozen aluminum cans, a wooden frame and a sheet of plexiglass or glass. Well, there is also some insulation, paint and hose pipe to use too, but all of the components that go into the heater are either easy to find or cheap to buy.
Simply construct a box using a wooden frame, some plywood for its back and the pain of glass its front. Drill holes in each of the cans that you have so that a stream of air can weave its way through them, like through a tunnel. Paint the tins black, ideally with some highly absorbent paint like that used on barbecue grills, then connect the cans firmly inside the box.
Be sure to insulate and seal the box well, as ding this poorly can lead to heat loss. Then drill holes at the bottom (air intake vent) and top (exhaust vent) of the box, attaching short pieces of hose through them to the cans. As the air travels through the intake vent and through the cans, the heat of the sunlight coming through the glass heats it. By the time the heated air rises out through the exhaust vent, its temperature can have increased by as much as 10 degrees, making your garage or workshop that bit cozier.
The only question now is where to install the heater. Of course, you must note in which direction the equator lies, as the system only works effective with maximum exposure to the sun. So south if you live in the northern hemisphere and north if you live in the southern hemisphere. Once you’ve located a suitable space (either in a door or a wall) you must cut a hole there to accommodate the heater. Once the heater is installed, the hole must also be sealed properly. A good idea is to use foil on the inside to reflect the heat in.
Once that is done, you can see that even in cold weather the winter sun will be strong enough to heat the air in the cans to around 100F. And yet, you’ll only have spent $100 or so for the heater – a cheap and highly effective passive solar heating system made by yourself.
Diy Passive Solar Heating – Comment below
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