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You're a god send. I couldn't find that. Looks like my concept is over engineered (dumb) and my current setup just needs a check valve and an expansion tank.

So I'm currently ideating a concept for creating a makeshift recirculation "port" for my Hot Water Heater. The HWH model I've got doesn't feature a factory recirculation port (Navien 240S). Please take a look at the current setup image (let me know your thoughts). Then take a look at the...

Back to this comment here. I'm a bit confused of the placement of the tampering valve. Because the heating loops are closed if I pull in cold water (from city line) to regulate the temperature of the water going out to the zones won't I be increasing the pressure of the loops which would trigger...

Are you referring to the lines from the HWH to the Heat Exchanger? the line that feeds the loops through the pressure regulating valve? or all the lines not part of the heating loops?

Yes friend. Agreed. Because my system won't be consuming water the pressure should not have any major fluctuations and thus the water coming back from the heat exchanger should have no problem making it's way back to the water heater (unless someone is consuming heated water in which case that's...

Understood on the tampering valve comments. The flooring is hardwood. The application will be underfloor in between joists. I'll make note of the cleaning valve and temp regulation requirements (it's a tankless water heater by the way). I'm only using two loops currently but the plan is to use...

Correct it's still providing potable hot water. When I said "nothing" I was referring to the heating system. Some folks thought the water was being consumed/mixed with the water in the loops.

Thank you so much. I acknowledge all your comments and will address them. Some of these seem to be no brainers now that you mention them. I've got a few questions though. 1) Aquastats are normally used within a tank no? I understand the purpose would be to limit the thermal inertia of the...

Diagram

Hello there, a complete noob here. I recently decided to implement Hydronic Radiant Heating in my house (NJ). I've read large portions of John Siegenthaler's book on the subject as well as consumed hundreds of hours on YouTube/internet researching. I need people that are more experienced than...

The diagram of the heating system.

Please pardon the typo. I mean to write "two".

City water supply.

Please read the comments in the picture.