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cool thanks for answering my questions, i could probably tweak mine to work like you say where it runs the pump all the time and only fires the heater when needed would just need to figure out the controls. the shop stays a fairly constant 60 degrees it might get up to 61-2 depending on what...

so when you say constant circulation do you mean the pump is running constantly 24/7 and the heater/boiler only turns on when a thermostat call for heat ? I'm using an air temp thermostat to control the system, it triggers a Taco relay box that turns on the pump, since the heat source is an...

yeldogt, totally agree there was no spec for the resistance through the water heater so that was a variable i could not calculate and did not calculate high enough when i did my calcs. i have pressure gauges on both sides of the heater and looked at the pressure drop to estimate the head...

IowaRoots, its not bad to sweat the pieces together i used 1" it just takes a little but to get it hot enough to pull in the solder but once you do 2 or 3 you will have it down. wipe the joints with a rag to clean up excess solder and it will look like a pro did it. i also had mine all pre...

yep i built it all myself just looking at what everyone had to offer online and suggestions from post's i read here. i didn't go with a premade panel because the cost always seemed to be about double what i could buy the pieces for and do it myself plus that's half the fun. i hope all goes well...

i have a 30x40 shop with a Takagi T-H3M-DV-N i believe, its the same as the Hydro Smart HS120 if you look at the pictures and download both manuals you will see its the same unit. has worked great for the last 2 years. the heater seems to have 3 rows of burners that I'm assuming are 40k BTU a...

testing