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05-30-2007, 11:24 AM
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Join Date: Mar 2007
Location: gone
Posts: 245
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Restricted, crimped air ducts?
........
Last edited by Jeff Eastman : 12-19-2007 at 06:56 PM.
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05-30-2007, 04:25 PM
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Join Date: May 2007
Location: Frankfort, KY
Posts: 176
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Re: Restricted, crimped air ducts?
Jeff,
It wouldn't be a bad idea to recommend that they have the static pressure of the duct system tested to verify proper airflow.
Any equipment attached to a duct system like that is in for a rough run.
__________________
Measured Performance more than just a buzzword
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05-30-2007, 04:34 PM
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Join Date: May 2007
Location: Frankfort, KY
Posts: 176
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Re: Restricted, crimped air ducts?
If you need a contractor in Vegas that does performance testing I can hook you up Jeff.
One of the guys who mentored me lives in Vegas.
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Measured Performance more than just a buzzword
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06-01-2007, 10:42 AM
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Join Date: Mar 2007
Posts: 4
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Re: Restricted, crimped air ducts?
As a rule, flexible ductwork should not be installed in lengths greater than 8 feet, and with a bend greater than 90 degrees. One could test for "static pressure", but where? Suggest testing for volume delivered at each outlet for a more definitive result.
Joseph D. Rago P.E.
A.E.G.
Yardley PA
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06-01-2007, 03:46 PM
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Join Date: May 2007
Location: Frankfort, KY
Posts: 176
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Re: Restricted, crimped air ducts?
You could test the total external static pressure to see how much resistance the fan is seeing & you could also measure the static pressure drop of each suspect flex run out.
Most guys can afford a manometer or magnehelic, most don't have anyway of measuring air volume from the registers.
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Measured Performance more than just a buzzword
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06-01-2007, 09:37 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 7,644
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Re: Restricted, crimped air ducts?
Originally Posted by Joseph Rago
As a rule, flexible ductwork should not be installed in lengths greater than 8 feet,
Where is that information from?
Would like to read it.
I know that flexible "air connectors" are not allowed longer than 14 feet, but "flexible duct" length is unlimited.
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06-01-2007, 10:00 PM
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Join Date: Oct 2003
Location: Rockwall Texas
Posts: 2,396
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Re: Restricted, crimped air ducts?
Why not install saddles below the ducts where the strap is restricting the air flow?
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Rick Hurst_Home Works Inspection Co_Rockwall TX
In the words of Mike Tyson.... "Everyone has a plan until they get hit inda mouf"
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Replies |
Last Post |
| Air ducts |
John Stephenson |
Heating, Ventilation, Air Conditioning (HVAC): Home Inspection and Commercial Inspection |
2 |
05-08-2007 06:22 PM |
| Metal ducts |
Jeff Eastman |
Heating, Ventilation, Air Conditioning (HVAC): Home Inspection and Commercial Inspection |
5 |
04-07-2007 03:12 AM |
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