Recent content by George-in-NH

I have a 2 post 9k lift in 5" of concrete with no rebar or wire, only fiber mesh in mix - due to a miscommunication during floor installation. If concrete was good quality don't worry about it.

I think your saying that the best efficiency is when you are able to match the rate heat is added (with an always running system that adds btu's to the floor) to the rate the building looses btu's. An Ideal situation that is a goal but it would be a very impressive thing to achieve with the...

Thermostat is wired into the Taco zone control. The thermostat signal is also output from the Taco to the boiler ZZ input. So the call for heat from the thermostat tells the Taco to turn the zone circulator pump to start pumping and it tells the boiler to make some heat. The boiler controls...

Hi, The boiler powers the pump for the boiler loop (primary) and the taco powers the heating loop (CH or Secondary). The thermostat, through the Taco, tells the boiler it needs heat and starts the CH pump. The ODR sensor signal goes to the boiler and the boiler controls the temp of the...

I have 9 left over Crete Heat Panels for free see here https://www.garagejournal.com/forum/threads/free-crete-heat-2x4x2-eps-panels-for-radiant-slab.484038/

I have 9 left over panels from my garage build. Located in Hampton, NH. Message me and I'll arrange a time to leave them out and you can pick them up. Don't want to throw out and don't feel like dealing with selling. George

So I did finish this in time for warm weather[emoji4] We did have a mini cold snap so I was able to test it for a bit. It was around 30f for a high temp for a few days. The floor got to 72f. Air temp @ 5 ft was 65f. Very comfortable. I played with the outdoor reset curve selections. At the...

> That would have been very helpful. Does it give much info on how to tune the system after it is in place? I like to tinker.... Re Shepner It doesn't really have a section on trouble shooting but it does explain what each design element is meant to achieve and how it should work. I...

Re Shepner - *I'm in this without an expert plumber to help. Originally, I started to work with a guy who seemed eager to help. He came and was responsive to my questions etc even offered to set me up to buy off his account if I wanted to do it myself. Then... stopped picking up the phone...

Re yeldogt The cost difference (suplyhouse.com) is 175 (A2) - 155 (A1) = $20 bucks. Maybe I should just get the later Alpha2 version even if the Smart Apdapt feature isn't going to do anything for me. George

Answering my own questions - It looks like the Grundfos Alpha pumps display the flow and the wattage used. This is great! I'm going to return the 2 pumps I bought and buy some smart pumps. I think I am going to go with Alpha1 pumps since the additional features of the Alpha2 pumps don't...

Thanks for the comments - I'm reconsidering the selection of fixed speed (3 speed selectable) Grundfos pumps. My initial not-in-depth reading about smart circulators led me to think that they are beneficial to systems with constantly changing head pressures due to valves opening and closing...

Re shepner - Thanks for the reply! Makes me feel good to read of a similar setup that is working well. I've already purchased the bulk of the the parts including the pumps. I had started to investigate ECM pumps that could vary speed, but decided to just go with 3 speed settable Gundofos...

Re Chris705 & yeldogt - I think I'm getting a pretty good understanding of how I could add upstairs H2O heat. I'm going to stick with the electric baseboard for now, but lay out the piping so I can add a secondary loop for upstairs some day. I've also been toying with the idea that I could...

Hi All, Question - If I were to add upstairs hydronic heat (replacing electric baseboard) - Unless low temperature high mass or panel radiators are used - Does the benefits to efficiency of a condensing boiler go away with a high temperature loop? Part of the reason I went with Electric...