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  1. Thank you very much, this tool will help...

    Thank you very much, this tool will help significantly.
  2. I called Copeland and asked what alternatives are...

    I called Copeland and asked what alternatives are available for the compressors, they said we could use R422X (A/D) for the freezer rooms and refrigeration rooms respectively.

    Maybe it would have...
  3. Line Sizing (refrigerant pipe size) Removal of R-22 and use of R-422A & R-422D

    We have a refrigeration room and a freezer room for food, the existing refrigerant is R-22.

    The Freezer will use R-422A, and the Refrigerator will use R-422D

    The big question I cannot find an...
  4. Basic load calculation for a ductless split?

    Hi guys,

    I am doing a little load calculation, but most of the "excel" heat balance calculations are based off of ventilation. This is just a ductless split unit, and therefore there is no...
  5. Replies
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    857

    There is only supply (100% OSA) and Extract. No...

    There is only supply (100% OSA) and Extract. No return. So we don't have to worry about smell from the HVAC system.

    I am required to do two things according to our client:

    1. Provide a...
  6. Replies
    9
    Views
    857

    Smoking Room - How to handle transfer air

    Hi folks,

    We have a smoking room thats supplied and extracted by one system along with all the other spaces (no return). We are providing more extract than supply in the smoking room, and in the...
  7. Replies
    7
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    1,183

    The thing is, its an existing unit. And we are...

    The thing is, its an existing unit. And we are not in the USA. Its in Norway, and the unit is offshore. I don't believe any of their offshore systems return air...

    but before :hijacked: :) ...
  8. Replies
    7
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    1,183

    I am wondering if I should just use q = 1.08...

    I am wondering if I should just use q = 1.08 (Delta T) * CFM to calculate the temperature difference, and make sure the cfm is sufficient to keep the delta T below setpoint?
  9. Replies
    7
    Views
    1,183

    Computer room with 100% osa unit

    Hi HVAC talk,

    I have done many computer room projects, but this is one of the first where the unit conditioning the computer room is 100% outside air. I have a few questions on how to determine...
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