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#1
10/30/09, 10:08 PM
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HVAC Duct Issue
This is an inspection on a short sale house. The house has some moisture issues, with mold on the walls and carpet. The HVAC duct has this white substance on it. I am not sure if it was manufactured this way or if it is the result of the moisture. It seems to be consistent on all the visible duct work, but, some of the elbows are smooth and shiny with a little bit of the white on it.
 Michael Merino Merino's Home Inspection & Education Inc. "Not just an Inspection, an Education"SM Phone/Fax 708~535~6057
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#2
10/30/09, 10:14 PM
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Re: HVAC Duct Issue
I'm not sure, but I think it's galvanized.
Mark Nahrgang www.DaytonSpringfieldHomeInspector.com www.HeyMark.info Home Inspections for Springfield, Dayton, and surrounding OH areas.
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#3
10/30/09, 10:18 PM
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Re: HVAC Duct Issue
Quote:
Michael Merino Merino's Home Inspection & Education Inc. "Not just an Inspection, an Education"SM Phone/Fax 708~535~6057
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#4
10/30/09, 10:22 PM
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Re: HVAC Duct Issue
The smooth sections might be stainless...
The moisture wouldn't likely cause mold to grow on metal. Mold grows on organics, and if there was any dust on the ducts for it to grow on, you could wipe it off. Mark Nahrgang www.DaytonSpringfieldHomeInspector.com www.HeyMark.info Home Inspections for Springfield, Dayton, and surrounding OH areas.
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#5
10/30/09, 10:34 PM
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Re: HVAC Duct Issue
Thanks Mark, you have been a great help.
Michael Merino Merino's Home Inspection & Education Inc. "Not just an Inspection, an Education"SM Phone/Fax 708~535~6057
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#6
10/31/09, 10:31 AM
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Re: HVAC Duct Issue
Without a doubt Mike, that is in the galvanized plating. No worries mate!
 Drew Levy NJ# 24GI00101400 Radon # MET12929 Homespect LLC (609) 668-7588 http://www.homespectllc.com http://www.philadelphiahomeinspection.net http://www.southjerseycommercialinspection.com http://www.haddonfieldhomeinspection.com http://www.abseconhomeinspection.com http://www.willingborohomeinspector.com http://www.thehomeinspectioninstitute.com
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#7
10/31/09, 12:50 PM
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Re: HVAC Duct Issue
Do a ph test on the white stuff and check the sheetrock.
"Insanity: doing the same thing over and over again and expecting a different results." Albert Einstein  David A. Andersen & Associates Clarksville - Nashville Home Inspector Lic#40 http://www.midtninspections.com ITC Level III Thermographer Cert#1958 Building Science Thermographer Cert#33784 http://www.thermalimagingscan.com HVAC Certification EPA Cert#2046620  BPI# 5015804Link to my Website at: http://www.midtninspections.com/link-submission
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#8
11/2/09, 6:02 PM
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Re: HVAC Duct Issue
That is oxidized zinc from the galvanized sheet metal. This happens if they leave the sheet metal stacked with moisture between sheets before it is formed into ducts. I have refused many shipments of sheet metal for this very reason. It is only a cosmetic problem as far as I can tell, but many customers balk when they see it.
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#9
11/2/09, 9:00 PM
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Re: HVAC Duct Issue
Quote:
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#10
11/6/09, 10:48 PM
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Re: HVAC Duct Issue
In the steel industry we called it white rust. As was said, it is an oxidation of the zinc coating.
Robert Sole, CMI  407-637-7288 Florida license numbers HI 169 and MRSA 92 Serving the Orlando Florida area including Orange, Seminole, Northern Osceola and Southwestern Volusia Counties. RobertSole@REMinspections.com Check out my blog orlandohomeinspections.info/ REMinspections.com OrlandoHomeInspector.net
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