Does anyone make a water coil that can be inserted into a 6" diameter chimney flu? I would like to pre-heat the boiler return water by running the water through a chimney coil of some type. Google searches have yielded no results.
If nothing exists, can I wrap some flexible copper pipe around the chimney flu piping and then insulate it?? I have 1.25" Black Iron piping returning to the boiler. I should be able to 'tee' off to a 'Y' and then reduce down to two strands of 5/8" flexible copper pipe. Then I can wrap the two strands of copper pipe around the chimney a bunch of times and then reconnect to the boiler return line.
Any thoughts???
If nothing exists, can I wrap some flexible copper pipe around the chimney flu piping and then insulate it?? I have 1.25" Black Iron piping returning to the boiler. I should be able to 'tee' off to a 'Y' and then reduce down to two strands of 5/8" flexible copper pipe. Then I can wrap the two strands of copper pipe around the chimney a bunch of times and then reconnect to the boiler return line.
Any thoughts???