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Inspecting HVAC Systems Topics include heating, venting, and air conditioning inspections.

 
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  #1  
Old 10/17/07, 12:05 AM
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gporter gporter is offline
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Default Duct work covered with this
This home was built in 1961. What is this covering on the duct work.
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duct-work-covered-100_4244.jpg  


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  #2  
Old 10/17/07, 3:35 AM
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Charley L. Bottger Charley L. Bottger is offline
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Default Re: Duct work covered with this
Paper discolored by heat


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Old 10/17/07, 6:38 AM
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David P. Valley David P. Valley is offline
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Default Re: Duct work covered with this
Quote:
Originally Posted by cbottger
Paper discolored by heat
I concur...
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Old 10/17/07, 8:11 AM
ldapkus ldapkus is offline
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Default Re: Duct work covered with this
Doesn't look suspicious to me.
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Old 10/17/07, 8:36 AM
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Default Re: Duct work covered with this
Thanks


Gary Porter

GLP's Home and Mold Inspections
321-239-0621

Certified Commercial Mold Inspector

Serving Orlando, Kissimmee, Winter Park, Winter Springs, Oviedo, Titusville, Celebration, Harmony, Avalon, Windermere, Deltona, Debary, Sanford
Orange County, Seminole County, Volusia County, Osceola County

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  #6  
Old 10/17/07, 7:22 PM
Brian A. MacNeish Brian A. MacNeish is offline
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Default Re: Duct work covered with this
Quote:
Originally Posted by gporter
This home was built in 1961. What is this covering on the duct work.
HHMMMM!! In Florida. Does this HVAC system have A/C? If so, could it be an insulation covering with an asphalt based exterior vapour barrier to prevent moisture condensing on cool duct surfaces in humid wether?

Looks like an asphalt coating to me. How hot would heating air have to be to discolour paper that much? 300-400 deg F......the high limit should've shut it down way before that point!!!
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Old 10/17/07, 8:33 PM
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Charley L. Bottger Charley L. Bottger is offline
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Default Re: Duct work covered with this
Lo
Quote:
oks like an asphalt coating to me. How hot would heating air have to be to discolour paper that much? 300-400 deg
I did not think I would have to spell it out word for word he did say 1961.

Heat over time = discolored paper see it all of the time


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  #8  
Old 10/18/07, 7:00 AM
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David P. Valley David P. Valley is offline
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Default Re: Duct work covered with this
Quote:
Originally Posted by cbottger

Heat over time = discolored paper see it all of the time
Yep, Same here.
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Old 10/18/07, 7:02 AM
Brian A. MacNeish Brian A. MacNeish is offline
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Default Re: Duct work covered with this
Quote:
Originally Posted by gporter
This home was built in 1961. What is this covering on the duct work.
Gary: Is there insulation under the paper covering the ductwork?
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