II hope this gives you ideas...if either of you are in Iowa or are passing through drop me a line and you can have a look.
The recirculating heater is very hard to get all in 1 photo. Basically I have a very small 5 gpm pump pulling out of my hot water tank and sending water to the heater. The pump is operated by aquastat and a relay. The heater operates by flow...so when ever the little pump goes...it goes. Pretty simple...but you asked and I didn't want to leave anything out!
