combi boiler

  1. B

    Vacuum relief valve on hot water storage tank

    I am a DIY home owner in Michigan under the 2015 IPC. I sent my inspector a "How does this look?" picture via email. He responded that the hot water storage tank needs a vacuum relief valve. The code he is referring is "P2804.7 Vacuum-relief valve" and is referenced below. I attached a picture...
  2. ColinMcM

    old cast iron radiators primary/secondary layout question

    New Utica combi boiler in basement. I am reinstalling three old cast iron radiators on third floor for 600 sq ft tenant apartment (bedroom, bathroom, LR/kitchen). The rads had previously been supplied by steel pipes exposed in rooms running vertical through first and second floors (brick house)...
  3. Dobson

    Help with return water dip switch settings (Navien NCB 240e)

    I’ll keep this as short as possible. I’ve read the manual and scoured the internet and have yet to find a clear answer here. I have a brand new Navien NCB 240e that so far has given me nothing but problems. However, I’m slowly finding out that my problems are from an incompetent installer and...
  4. Kengie

    Hydronic Pipe Layout

    Hi there, I am looking for some second opinion from the wonderful community here. Previously I was using an oil based boiler and recently converted to a Naiven combi boiler NCB240-130H with a 3 zone smart thermostat and aluminum fin baseboard. While looking at the primary loop of the pipe...
  5. Seth Rieder

    Need help dialing in settings on Navien NCB240E

    I am curious what the best settings for my system would be as the installer has been less than helpful. This is our second winter here and after heating the house last year with the in floor it didn’t like to keep up in the very back corner of our house which happens to be the master bedroom. I...
  6. Ashwin

    New HTP Combi Boilers EFTU-199WCN vs ELU-199WCN

    Hello, My plumber is recommending the HTP Combi Boilers line for our home to replace a non-functional water heater and 40 year old cast iron boiler. HTP has come out with two new systems where the difference seems to be in the heat exchanger material in use and design. EFTU-199WCN ELU-199WCN...
  7. Kengie

    Understanding of a Combi Boiler

    Hi there, I'm looking into converting my iron-cast boiler to a combi boiler but I would like get an understand of how the combi boiler works. If starting from 13C to 21C will take a long time to heat up a room. Would the combi boiler be constantly on until the desired temperature is reach and...
  8. Karl Lucas

    Navien NCB240E Pressure problems

    My Navien Combi Boiler installed Dec 2019 consistently runs at a high pressure - 27-30psi. The following conditions exist: I have a 4-zone system with Tac0-570-2 valves in a 3,000 sq. ft. home with highly oxygenated well water; when first installed it was not set for fin radiators- that was...
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