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  1. gooutandgetem

    Fan Law - Belt Drive vs Direct Drive

    Can someone help on the question below? If I change from a Belt Drive Roof Top Centrif Exhaust Fan to a direct drive will I save energy? See details Old Fan: Motor RPM 1800, 1/4 hp and Fan RPM 1000 New Fan: Motor RMP 1000, 1/4 hp and Fan RPM 1000 The new fan has an ECM type motor that...
  2. gooutandgetem

    Heat pump fan coil in a small closet

    I have a 16" wide by 22" deep heat pump fan coil unit (upflow). I want to intall in a closet with a 24" door. The closet is 36" wide and 26" deep. My thougt is to place the units left edge at he left edge of the door, so the control panel can have clear access. The line set connections can be...
  3. gooutandgetem

    Residential Cooling Loads - Plug load

    I dont work with residental HVAC designs much. I have a 800 SF unit with 3 exposed walls (r-6 wall, r19 attic insul). I can up with 1.3 tons (about600 sf/ton). I used .7 watts per SF lighting and .5 watts per SF plug load. Are these reasonable values for a residental unit? Is the overall...
  4. gooutandgetem

    HVAC Muilt-zone Unit conversion to VAV with reheat - savings

    Does anyone have a good source that covers the retrofit options to make a Multi-zone unit (hot deck and cold deck sytems that mixes the two air streams to condition a zone)more efficeint? There must be some good info out there but I have not found it yet. I have seen the hot deck disabled and...

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