I am going to put a tee in my pressure relief port (ahead of the pr) and run a line (with a pump inline) to the extra hole in the coil faceplate to give it a continuous blast of hot water into the coil area as I am not getting much temp drop during hot water use.
A Taco 007 pump is the cheapest I can find which is way over kill through the half inch port in the faceplate. Maybe I can find a smaller one or dial back the the speed of the Taco with a paddle fan controller. Or I may just go with a remote switch and mount the remote next to the shower. The Taco is .71 A (85 watts) Yeah, I have too much time on my hands,
as I don't think it is ever going to stop raining here!
This link is broken, either the page no longer exists or there is some other issue like a typo.