Heat exchanger tank under construction, version 2.0 For both the hydronic and domestic hot water. Version 3 will be vacuum insulated, I think. Photo 10 of 26 in Our Owner Built Home by Spiral Cone Legs

Our Owner Built Home

10 of 26

Heat exchanger tank under construction, version 2.0 For both the hydronic and domestic hot water. Version 3 will be vacuum insulated, I think.