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I've been thinking the same and mainly found this so far: http://wyndflow.com/ http://wyndflow.com/
by myroon5 5y ago
I've been thinking the same and mainly found this so far:
http://wyndflow.com/ http://wyndflow.com/
- xaduha 5y agoThere are some DIY recuperator videos on youtube https://www.youtube.com/results?search_query=diy+recuperator https://www.youtube.com/results?search_query=diy+recuperator