DIY Open Fireplace Heat Exchanger Project

I built an open fireplace heat exchanger to recover the energy lost up the flue. I had the idea then went on YouTube and was inspired by others who had also made their own units.
I'm a DIY guy and choosing to build this was a great journey but I wasn't sure if I could do it. I gained extra skills along the way.
The moral: Even if you don't know how to do something, you won't know until you try. Experience is something you get until just after you need it.

Music:
Crunk Knight by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1400044
Artist: http://incompetech.com/
Marty Gots a Plan by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1500015
Artist: http://incompetech.com/
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