Tech Tips

Inspecting Heating / Cooling Ducts

 

We see different sizes and configurations of heating / cooling ducts. In addition to ensuring the ducts are properly sealed, there are many other issues associated with ducts. On a forced air furnace, home inspectors should ensure return ducts are properly sealed. Duct tape is not recommended. Mastic or foil tape is recommended. Not only will this ensure that the system is efficient, open return ducts may be dangerous. Flue gasses from the furnace or other fuel burning appliances in the area can be drawn into the system causing Carbon Monoxide to be distributed to the living space. Also contaminants can be drawn in like mold, dust, and fungus.  All seams should be sealed. Ducts should be as straight as possible. Direction changes will reduce flow and efficiency. Sheet metal secured and properly sealed to floor joists and wall studs can be used for return air only. Here are some other guidelines a home inspector can use when inspecting ducts:

 

  • Ducts should be supported on the framing
  • Sheet metal ducts should be supported with at least ½ inch wide straps at less than 10 feet intervals
  • Flex duct should be supported by at least 1 ½ inch straps at less than 4 feet intervals
  • Plastic zip ties should be used to secure flexible duct
  • The use of flexible duct should be limited unless the HVAC system has been properly sized and evaluated by a qualified contractor
  • Ducts should be supported within 1 foot or 1 duct diameter (use the smaller of the two) at all bends and fittings
  • Plenums should be supported independently of the distribution ducts
  • Ducts should be connected with self tapping screws or rivets

 
Still not using the best home inspection report creator on the planet?

CLICK HERE to start your FREE subscription - NO credit card required

Why inspectcheck? - Check out some of our great features

feature

See What Joe Ferry, The Home Inspector Lawyer has to say about inspectcheck.net

feature

5 Minute Roof Inspection

feature

Log In Issues, Technical Support, or the inspectcheck tutorial?

For Log in issues, technical support, or the inspectcheck tutorial click the link below

feature

Is Your Home Inspection Report Putting Your Business At Risk For A Lawsuit?

feature

Visit Our YouTube Channel

Browse our YouTube Channel to see instructional videos including; adding videos to your report, advanced photo enhancements, editing and signing your personalized contract / agreement for home inspection, speech recognition, and much more.

Copyright © 2018 Inspectcheck.net