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  1. hlv

    improving pump setup on modcon p/s loops

    Last fall I had a new modcon boiler serving two fin-tube baseboard zones. I have a couple questions regarding the current circulator pump set up and whether it could be improved. The system is a Lochnivar Knight WH55 boiler with Grundfos pump (UPS15-58FC) on the primary loop and a BumbleBee...
  2. hlv

    Right-sizing a mod-con boiler for 50K heat load

    I'm planning to replace my 33-year old natural gas Teledyne-Lars boiler with a high efficiency unit, to take advantage of Massachusetts' early boiler replacement program rebate, and because it doesn't seem worth throwing money at it to fix the noise (flashing?) issues which have worsened over...
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