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Static Pressure Thread: Air Handlers

Discussion in 'Residential' started by Doc, Aug 2, 2006.

  1. Andy G

    Andy G Riff raff

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    12,247
    Location:
    Galapagos Islands
    Yeah like my A/C takes 2 hours to cool my house from 85 to 66. I need a stronger system.

    OK how much money ya got?
     
  2. Fat Eddy

    Fat Eddy Later

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    4,443
    Andy you need to shut the doors when you have the air conditioner on, try that and get back to us.
     
  3. Andy G

    Andy G Riff raff

    Messages:
    12,247
    Location:
    Galapagos Islands
    But my goats come in and out all the time

    If I try to close a door, one of them butts me in the balls.

    Now what do I do?
     
  4. Fat Eddy

    Fat Eddy Later

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    4,443
    You need an occupancy sensor then.
     
  5. Andy G

    Andy G Riff raff

    Messages:
    12,247
    Location:
    Galapagos Islands
    If I am butted out the door, the goats have occupancy and control?
     
  6. SlimWoodie

    SlimWoodie I Be Bant

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    2,113
    aaahhh ...

    I used ta sell Webco ..

    afore's i went back to Earning a living ..:)
     
  7. Andy G

    Andy G Riff raff

    Messages:
    12,247
    Location:
    Galapagos Islands
    As a service tech I actually sell some Lennox

    Most people trust a service tech more than a salesman :D
     
  8. refrigerationtech

    refrigerationtech Nut Case!

    Messages:
    1,997
    Location:
    Cold Place
    been reading this and got my interests too. i have a goodman furnace tied into a 2.0t a/c ( prev 1.5). furnace says can handle up to a 3 ton a/c for airflow requirements. although i got to say that i find now its little bit hotter upstairs then before. i had a old lennox g24 furnace that got converted to this 2 pip high eff one. think its a 75000- 85000 btu one.

    i got to run a few more tests and post the results but the fan curve data sheet could be found for the goodman;s?
     
  9. Doc

    Doc Insert clever and witty comment here

    Messages:
    5,892
    Post a model number of the goodman and I'll get you the fan data rt.
     
  10. Bender

    Bender Regional Technical Beer Drinker

    Messages:
    23,154
    Location:
    In a van, down by the river
    As Doc said....post your model number....I have access to Goodman's fan data stuff also....

    Can't wait to see your numbers from your testing....I love learning shit....:shots:
     
  11. John Picco

    John Picco New Member

    Messages:
    1
    To measure the total system static pressure, you would need to add up the pressure reading on the supply side and the negative pressure reading that was taken upstream of the filter. .35" WC on the return and .1"WC on the supply= .45"WC total system static pressure. Hope this helps.
     
  12. fixittillitsbroke

    fixittillitsbroke New Member

    Messages:
    4
    Location:
    california central valley
    can a dirty blower wheel affect your static pressure readings and how much is acceptable
     
  13. southern_tech

    southern_tech New Member

    Messages:
    36
    Anyone ever take a Manual D duct class.. ? they spent time on statics and using the magnehelic.. but a lot of it comes down to how is the duct system in the house/condo pre-install cause not having enough return air or not enough supply your static readings don't mean much til you get a reading and add a return or supply then take another reading and add accordingly and take another reading and so fourth, and a lot of sales guys and even techs i see rely on a ductulator and you can throw those out the window with there stats on them til you get the statics right. if you never took a Manual D class i recommend it, its a lot of math but interesting. For those that are new to ductwork know that 90 in the pic on the return accounts for like 20-30 ft alone and you will learn sometimes the furthest drop from a A/H in a house is not always the furthest. the closest one sometimes depending on the duct system can be the furthest
     
  14. jrbenny

    jrbenny Yuge member

    Messages:
    31,370
    Location:
    Not here but over there.
    Am I missing the boat here? I had an engineer tell me that I was measuring esp wrong on the gas furnace. He told me that the 0.60 iwc number is not what you use.

    :rolleyes:

    http://db.tt/VRV07FJI

    Doc
     
  15. Chuck

    Chuck The Other Dude

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    7,659
    Location:
    LAX
    He's wrong.
     
  16. ISOTHERMAL

    ISOTHERMAL senior member

    Messages:
    33,671
    Location:
    Green Acres
    his job title says it all.
    have him show you, in print, how to measure esp
     
  17. jrbenny

    jrbenny Yuge member

    Messages:
    31,370
    Location:
    Not here but over there.
    I asked him for a reference. :-D
     
  18. jrbenny

    jrbenny Yuge member

    Messages:
    31,370
    Location:
    Not here but over there.
    Fuggin engineer. Sitting here thinking about him and his lackey. Both of them told me the blower curves included the coil and filters. Dolts.
     
  19. Jay 41

    Jay 41 Whole-ass

    Messages:
    141,291
    Location:
    Madiganistan
    Lennox includes the filter.:shocked:
     
  20. jrbenny

    jrbenny Yuge member

    Messages:
    31,370
    Location:
    Not here but over there.
    Only a rock catcher at 600 fpm. Usually a 0.04 iwc pressure drop.