[Mobile Master Tech]

I understand about the noise, but I don't find mine very obtrusive. I think silicone plumbers grease would lick that problem. If I do or redo any plates with it, I will post.

I found that 2-4ft plates sourced from a vendor I found on ebay were hardly more expensive on a per foot basis than the special staples for PEX though, assuming around 60% coverage with plates.

165F. Yup, great for cast boilers. Stainless, bronze or cupronickel equipment gets around the need for high temps. I wanted to be able to combine DHW in an open system for simplicity and to use lower exergy sources.

You mentioned using heat exchanger and two pumps to heat or draw from the tank, your controller makes your boiler see 25F delta, and that the hydronic zones see water from the boiler before going to the buffer tank. How do you regulate DHW temp?