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  1. #1
    Join Date
    Jun 2005
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    SW Wisconsin
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    Lightbulb Holmes On Homes- Holmes & H-VAC Guy both read their anemometers as showing CFM

    Holmes On Homes; last night again Holmes & the H-VAC Guy both read their anemometers as showing CFM Volume when they were showing FPM Velocity. (Rerun?)

    It was a floor diffuser, didn't get a good look at it but was either a 4X10 or 4X12.

    Initially said it was delivering 410-cfm/which was FPM; Hart&Cooley show a 4X10 as .17-Ak Free-air-area, which is 81.6-CFM.

    Final was stated as 671-cfm which was actually FPM; .17Ak * 671-FPM is 114-CFM.

    A 4X12 yields .195-Ak * 480 is 93.6-CFM; 671-FPM * .195-Ak is 130.8-CFM.
    Ak is free-air-area of the diffuser.

    The FPM Velocity would be astronomical if that .195 or .17-Ak were flowing 671-CFM,

    I wish they would get it right from here on... Please...
    Last edited by udarrell; 08-15-2011 at 02:53 PM. Reason: Typo...

  2. #2
    Join Date
    Feb 2010
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    Cal
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    1,596
    Not an expert but he plays one on TV.

  3. #3
    Join Date
    Feb 2001
    Location
    N.E. Iowa
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    314
    Whew, that register would have been whistling at 671 cfm! It would have sounded like a jet engine.
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  4. #4
    Join Date
    Feb 2007
    Posts
    999
    Quote Originally Posted by btuhack View Post
    Not an expert but he plays one on TV.
    Yeh, like Alec Baldwin 'played a pilot' before.

  5. #5
    Join Date
    Aug 2011
    Posts
    568
    hey darrel, good catch, that's why you make the big bucks, holmes, comes across as a guy who never makes a mistake, he's the only guy in the world, that can do it right, and even if there isn't a problem, he'll find it. it's good, he's trying to educate the publlic, but again, the dude comes off, as a know it all! and if he bid originally on most of those jobs on T.V., he's never get them jmho!

  6. #6
    Join Date
    Jan 2005
    Posts
    21
    I saw the same show and was looking for a place to respond to Holmes about this error. Every time I see them measuring airflow it has always been showing fpm and not cfm. I can understand Mike not knowing but the hvac company is clueless also. They also do not use the meter correctly for measurements. No traverse done on the register.

  7. #7
    Join Date
    Nov 2009
    Location
    West Monroe, LA
    Posts
    287
    Also every time the HVAC guy was using Mastic, Mike said he was taping it up. Yeah also when i saw those numbers which where suppose to be cfm readings, I was thinking forget the meter, you should be able to hear that with that much air flow.

  8. #8
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,716
    homes need to stick with driving nails

  9. #9
    Join Date
    Jun 2005
    Location
    SW Wisconsin
    Posts
    5,004
    I like Holmes, he's okay & I enjoy his programs, however, I wish they would do a whole lot better when it comes to H-VAC content in their programs!

  10. #10
    Join Date
    Jan 2008
    Posts
    2,056
    Darrell - you should offer up your services to him - you certainly have the chops!
    Seriously, you never know, he may be looking for someone that actually knows this stuff, as opposed to the current "pro" he has has following him around.
    "Hey Lama, hey, how about a little something, you know, for the effort." And he says, "there won't be any money, but when you die, on your deathbed, you will receive total consciousness." So I got that goin' for me, which is nice. - Carl Spackler

  11. #11
    Join Date
    May 2007
    Location
    Dry as a bone Tucson
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    4,398
    Quote Originally Posted by udarrell View Post
    Holmes On Homes; last night again Holmes & the H-VAC Guy both read their anemometers as showing CFM Volume when they were showing FPM Velocity. (Rerun?)

    It was a floor diffuser, didn't get a good look at it but was either a 4X10 or 4X12.

    Initially said it was delivering 410-cfm/which was FPM; Hart&Cooley show a 4X10 as .17-Ak Free-air-area, which is 81.6-CFM.

    Final was stated as 671-cfm which was actually FPM; .17Ak * 671-FPM is 114-CFM.

    A 4X12 yields .195-Ak * 480 is 93.6-CFM; 671-FPM * .195-Ak is 130.8-CFM.
    Ak is free-air-area of the diffuser.

    The FPM Velocity would be astronomical if that .195 or .17-Ak were flowing 671-CFM,

    I wish they would get it right from here on... Please...
    It's because in his part of the world (north) it is heating dominate and the plumbers are all hvac guys also..... and they run the duct (single wall pipe usually......... WTF?.....It is always hilarious to watch the "duct work" installs and comments.
    Some Talk, Some Do
    "keeping condensing pressures low and evaporator pressures high"
    "Some customers are more interested in comfort than energy savings"
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  12. #12
    Join Date
    May 2005
    Location
    columbus ,ohio
    Posts
    239
    I like the show and watch it often. However I always have said, When money is not the issue then of course you can do everything "RIGHT". Why don't they tell how much the job would cost the homeowners if they actually had to pay the bill.

  13. #13
    Join Date
    Nov 2010
    Location
    N. Idaho
    Posts
    586
    Quote Originally Posted by countrykid78 View Post
    I like the show and watch it often. However I always have said, When money is not the issue then of course you can do everything "RIGHT". Why don't they tell how much the job would cost the homeowners if they actually had to pay the bill.
    I think in that episode, he and his right hand man said it would have cost 50K to do all they did.

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