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View Poll Results: How much do you spend for hot water and home heating?
Less than $500 5 26.32%
$500-$1000 9 47.37%
$1000-$2500 4 21.05%
more than $2500 1 5.26%
Voters: 19. You may not vote on this poll

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Old 10-30-20, 03:37 AM   #21
Helper EcoRenovator
Join Date: Oct 2020
Location: Cambridge, UK
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I’ve looked with interest at the heatgreen compost system 3a. It does look very impressive - I do wish there was an open forum available at its site, for others to discuss builds and issues. It seems as though this aspect is holding back larger scale adoption. I have not built one, but have considered it!

I also notice that there is a simpler smaller 4a device now shown on the same site. It avoids building a watertight inner bag, and rotating the whole system. Instead, it uses a wheelie bin, and a large corkscrew mechanism for stirring. Similar levels of insulation are used for both - 4inches of polystyrene. Below is a link to the 4a page:

It’s not clear to me, but I believe he places the 4a in a basement, and directly uses the hot air From the device as a heatsource for his house.

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