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  • Users: raptors076
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  1. raptors076

    Economizer damper control in heating season

    Hello All, ASHRAE 90.1 recommends supply air temmperature to control the economizer dampers and cooling coil valve. The standard provides clear reasoning for doing it. My question is related to heating season. From your experience ,did anyone had any issues with coil freezing if similar...
  2. raptors076

    HAP 4.41 Heat Loss/ Heat Gain Calculations.

    Hi, I have trouble understanding the output of the HAP 4.4 Carrier software. I did calculations for heat loss and found out that cooling load comes out to be 5 Ton but the CFM required for the space shown in the result sheet is 2400. How do I interpret these results? Maximum CFM per ton...
  3. raptors076

    Fixture units for LEED building

    Hi all, Most of the methods for water pipe sizing are based on old flow rates. And if you do the calculation according to them, the gpm required is way high compared to high efficiency plumbing fixtures. 1. Can anyone recommend how to put the factors for these fixtures units, especially for...
  4. raptors076

    ASHRAE 62.1 Exhaust Air

    1. If the exhaust requirement for the bld is 500cfm, is it required by the ASHRAE62.1 code to run the exhaust fan continously during the occupied period or it can be cycled on timing? Same question for the O/A requirment .. can it be cycled by providing more cfm then the required .. or it has...

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