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  1. ryanmcd77

    Estimating Operating Costs of DX Units

    I am trying to estimate the operating costs of the installation of a few new DX units. There are many detailed models that can do this, however I just need to get a quick number together. I have average monthly temps for a 2 year period, the units are selected, and the energy costs is $.09/KW...
  2. ryanmcd77

    Hot Water Pre-Heat Coil Question

    Thanks Roger, I have done the calc for the coil GPM, but is the pump typically sized for the full coil flow rate. Teh second question was more of a sequence question. Some say run it all the time, others say run it based on Outdoor Temp.
  3. ryanmcd77

    Hot Water Pre-Heat Coil Question

    Hi All, I'm new here and have two questions. My first question is how do you size a freeze pump for hot water pre-heat application? Second question is how do you control it?

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