Solar Sponge
The DIY Solar Air heater

Chris Lange's Solar Heater

Chris Lange wrote in with some photos and details of his Solar Sponge inspired DIY solar air heater project:

"i just stumbled across your site again and thought i'd let you know about my own heater project which was in-part inspired by yours and uses the same design. mine has a surface area of about 8.6m2 and is normally heating the living areas of the house. it cost around $1,100 to build. it has a 35W main fan at the collector inlet and a 5W booster/diffuser fan at the room outlet. the only modification i still want to make to it is to increase the height of the air channels behind the aluminium sheet to reduce resistance. at present the channels are only about 36mm high. "

Awesome work Chris, and thanks for sharing your photos with us.

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