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  • Users: hvacers
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  1. hvacers

    ASHRAE BEAP CERTIFICATION

    has anybody here took this certification? is it really necessary? and what are the topics coverage for the examination?
  2. hvacers

    lowest possible pump speed for VFD

    till how low can i reduce the speeds of my condenser water pumps? is there a limit that the pump cannot be set as low as 30hz. we are 60 hz here in our country. the application of the pump is because i really have a low delta T with my heat exchanger, the pump flow is 2000gpm and i am planning...
  3. hvacers

    how to design SPUs for an Elevator room?

    does anybody know the rule of thumb for elevators rooms in designing its SPU. what is its TR/sq.ft thanks guys
  4. hvacers

    Energy Utilization INdex

    Can anybody give me an idea about Energy Utilization Index of different types of buildings and applications. And how to compute it! thanks in advance
  5. hvacers

    Return Ducting

    Can any body give me ideas how to design return ductings. For example i have 50 TR AHU supplying 20000 CFM to an area? does my return must also be the same as my supply. for example it is just an office space
  6. hvacers

    what does HIGH COMPRESSOR LIFT mean?

    what does HIGH COMPRESSOR LIFT mean? I get alot of different explanations from different people and it is starting to become confusing. please share insights
  7. hvacers

    effect of lowering chilled water supply

    guys, is there any effect on the system (disadvantage/advantage) by lowering the setpoint of the chiller from 44F to 42F? from what i know... by lowering the chilled water supply; ADVANTAGE: Less amount of chilled water required to be supplied throughout the system therefore...
  8. hvacers

    how to count number of rows of an AHU coil...

    are the rows of the entering and leaving stub out also counted when counting the number of rows of a coil??
  9. hvacers

    AHU approach

    almost all of the approach of my AHUs in my building are very high eventhough it has already under gone its cleaning by pressure washer. the range of approach is 5F to 10F. as what i know, the approach of the AHU should be normally ranging from 0 to 3F. what could be the cause of this high...
  10. hvacers

    DUCTINGS LOSSES

    HI, Im an energy engineer of an HVAC company, i have a problem with one of my AHUs. I conducted Duct traverse to one of my ahus and measured the air flow of the diffusers to each area served. i measured 13000 cfm at the main supply ducting which just branched out of the AHU. While i just...

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