Would You Heat a Room With a Heat Grabber?

| 10/2/2009 1:54:57 PM

Tags: question to readers, heat grabber,

Heat GrabberMost of us prefer to heat and cool our houses or apartments with simple-to-use machinery such as furnaces and air conditioners. The next level of difficulty in heating might be the use of a woodstove for heat, or opening and closing windows for cooling. But you can go one step further and build a heat grabber.

A heat grabber is a simple box, painted black, that hangs outside of a south-facing window. The box is hollow and insulated. The sun strikes the black flat face, heats the air inside the box and the hot air flows naturally up and into the room. Some folks add a small fan to the unit to move the air further into the room, but it can be used effectively in a small room even if you don’t use a fan.

So, would you be willing to build and use a heat-grabber box to heat a cold room in your house? If so (or not), tell us about it in the comments section below.

5/26/2018 9:11:44 PM

I use the plans at WWW.EASYWOODWORK.ORG to build my own DIY projects – I highly recommend you visit that website and check their plans out too. They are detailed and super easy to read and understand unlike several others I found online. The amount of plans there is mind-boggling… there’s like 16,000 plans or something like that for tons of different projects. Definitely enough to keep me busy with projects for many more years to come haha. Go to WWW.EASYWOODWORK.ORG if you want some additional plans :)

3/25/2010 11:49:28 PM

I built a similar design last fall. I ligned the inside of the box with soda and beer cans painted with flat black bbq paint. The whole box is approx 3ft wide by 5ft high. I used insolated 4 in dryer duct to vent it into the house. On sunny days when the temps are above 20 which is most winter days I can top out at 110deg. If its over 30 out i can get 120+deg air. The front is plexi with a slight bow design. The cans give the heater a larger serface area whiches increases heat out put. I plan on making a few more as this 1 heater saved 100 gal of oil this year compared to last. E mail me for pict and more info. Kingbumbles22@yahoo.com

3/15/2010 4:02:37 PM

Absolutely! We live in Maine, and unfortunately our old house only has two small windows on our south facing wall. I've been thinking about this project over for about three years. I'm hesitant about cutting holes in the house for a wall mounted unit, so I'm going to make a window heat grabber first.

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