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  • Users: russgs
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  1. russgs

    Exhaust / Supply air Interlocks

    Could someone help clarify a code issue with me ? In a large institution like a High School, if one were to add a small (~400 cfm) range hood, what kind of mechanical interlocks between the exhaust and supply would be required to satisfy building code? Would you have to ensure that the main air...
  2. russgs

    Sizing a condensate return tank

    If anyone could tell me how to properly size a condensate return tank for a two pipe steam system it would be appreciated.
  3. russgs

    Expansion Tank size for Secondary closed loop

    Hi, Can anyone explain what value to use for the maximum pressure, when sizing an expansion tank. This is on a closed secondary loop. If it were the primary side it would be determined by the boiler PRV, but what is the determining factor for a secondary loop with a water to glycol heat...
  4. russgs

    Large pressure swings in secondary heating loop?

    We have a school with a primary heating loop off the boilers and a secondary glycol loop via a converter. Our plumbers are telling me that in the shoulder seasons when the temperatures are warmer they have to add fluid beacause the pressures in the glycol side are too low but when the outdoor...

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