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AIR CONDITIONING SYSTEMS
A/C COMPONENTS
CONTROLS & SWITCHES
A/C DATA TAGS
A/C TYPES, ENERGY SOURCES
RATED COOLING CAPACITY
AIR CONDITIONER BTU CHART
SEER RATINGS
OPERATING COST
SYSTEM OPERATION
OPERATING TEMPERATURES
OPERATING DEFECTS
LOST COOLING CAPACITY
COMPRESSOR CONDENSER
AIR HANDLER UNIT
AIR FILTERS for HVAC SYSTEMS
CONDENSATE HANDLING
CLEANING & Legionella BACTERIA
DUCT SYSTEM DEFECTS
  SUPPLY REGISTERS, & ZONES
  RETURN AIR REGISTERS & DUCTS
  BALANCING AIR DUCT FLOW
  UNDERSIZED RETURN DUCTS
  INCREASING RETURN AIR
  LOCATION OF REGISTERS & DUCTS
  DUCT ROUTING & SUPPORT
  WET CORRODED DUCT WORK
  LEAKY DUCT CONNECTIONS
  VIBRATION DAMPERS
  GOODMAN GRAY FLEXDUCT
  OWENS CORNING FLEXDUCT
  UNSAFE DUCT OPENINGS
  ASBESTOS HVAC DUCTS
  Transite Pipe HVAC Ducts
  FIBERGLASS HVAC DUCTS
FAN AUTO ON CONTROLS
A/C REFRIGERANTS
A/C REFRIGERANT LEAK DETECTION
A/C DIAGNOSTIC FAQs
INSPECTION LIMITATIONS
CRITICAL DEFECTS
Air Conditioning "How To" Books
FURNACES WARM AIR HEATING SYSTEMS

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Photograph of heat-deterioration of Goodman Gray Flex Duct in an attic

Goodman Gray Flex Duct Deterioration & Failures
AirCondAPedia ©

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  • Goodman Gray Flex Duct Deterioration & Failures in Air Conditioning or Heating Duct Products
  • Defective duct products and materials
Our site offers impartial, unbiased advice without conflicts of interest. We will block advertisements which we discover or readers inform us are associated with bad business practices, false-advertising, or junk science. Our contact info is at inspect-ny.com/appointment.htm.
© Copyright 2008 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use the links at page left to navigate this document or to go to Other Website Topics. Green links at left show where you are in our document & website.

This chapter discusses Goodman(TM) Flex Duct failures with references to product failures by two manufacturers of similar flexible duct work products, Owens Corning(TM) and Goodman(TM). Neither of these products is currently sold but both may be found in older homes. The master document, of which this is a chapter, describes the inspection of residential air conditioning systems (A/C systems) to inform home buyers, owners, and home inspectors of common cooling system defects.

GOODMAN GRAY FLEXDUCT - Deterioration in Hot Locations

Photograph of heat-deterioration of Goodman Gray Flex Duct in an attic Photograph of heat-deterioration of Goodman Gray Flex Duct in an attic

This Goodman gray flex duct or "flex duct" air conditioning duct work material is a defective product. In hot attic spaces or where exposed to UV light, the plastic of this flexible air conditioning duct material disintegrates leaving its fiberglass insulation exposed to also disintegrate, leak, or possibly blow into the building living space. Replacement of the duct work is required - a significant expense. - Thanks to Jon Bolton for these photos. of Goodman gray flex duct disintegrating in an attic.

Where this duct is found in a building it should be replaced.

For another flex duct product that is not as old but which can have similar disintegration problems, see OWENS ORNING FLEXDUCT

More Reading:
Asbestos as a duct hazard is discussed at ASBESTOS HVAC DUCTS.
Fiberglass in HVAC ducts is discussed at Types of Duct Work using fiberglass materials and at risk of mold contamination are discussed here.
Mold in the air handler or duct work is discussed at AIR HANDLER UNIT chapter
HOW TO PREVENT MOLD: Correct the Causes of Mold and Prevent Indoor Mold or other indoor environment problems
OPTIMUM INDOOR AIR QUALITY - Air Filter Choices & Placement for Optimum Indoor Air Quality







AIR CONDITIONING SYSTEMS
A/C COMPONENTS
CONTROLS & SWITCHES
A/C DATA TAGS
A/C TYPES, ENERGY SOURCES
RATED COOLING CAPACITY
AIR CONDITIONER BTU CHART
SEER RATINGS
OPERATING COST
SYSTEM OPERATION
OPERATING TEMPERATURES
OPERATING DEFECTS
LOST COOLING CAPACITY
COMPRESSOR CONDENSER
AIR HANDLER UNIT
AIR FILTERS for HVAC SYSTEMS
CONDENSATE HANDLING
CLEANING & Legionella BACTERIA
DUCT SYSTEM DEFECTS
  SUPPLY REGISTERS, & ZONES
  RETURN AIR REGISTERS & DUCTS
  BALANCING AIR DUCT FLOW
  UNDERSIZED RETURN DUCTS
  INCREASING RETURN AIR
  LOCATION OF REGISTERS & DUCTS
  DUCT ROUTING & SUPPORT
  WET CORRODED DUCT WORK
  LEAKY DUCT CONNECTIONS
  VIBRATION DAMPERS
  GOODMAN GRAY FLEXDUCT
  OWENS CORNING FLEXDUCT
  UNSAFE DUCT OPENINGS
  ASBESTOS HVAC DUCTS
  Transite Pipe HVAC Ducts
  FIBERGLASS HVAC DUCTS
FAN AUTO ON CONTROLS
A/C REFRIGERANTS
A/C REFRIGERANT LEAK DETECTION
A/C DIAGNOSTIC FAQs
INSPECTION LIMITATIONS
CRITICAL DEFECTS
Air Conditioning "How To" Books
FURNACES WARM AIR HEATING SYSTEMS

More Information

InspectAPedia TM Home & Site Map
Air Conditioning
Contact Us

AIR CONDITIONING SYSTEMS Chapter Index

To continue reading this air conditioning inspection guide, use links to the document chapters at left or below. Links shown in green font indicate where you are in this document.

  1. AIR CONDITIONING SYSTEMS
  2. A/C COMPONENTS
  3. CONTROLS & SWITCHES
  4. A/C DATA TAGS
  5. A/C TYPES, ENERGY SOURCES
  6. RATED COOLING CAPACITY
  7. SEER RATINGS
  8. A/C OPERATING COST
  9. SYSTEM OPERATION
  10. OPERATING TEMPERATURES
  11. OPERATING DEFECTS
  12. LOST COOLING CAPACITY
  13. COMPRESSOR CONDENSER
  14. AIR HANDLER UNIT
  15. AIR FILTERS for HVAC SYSTEMS
  16. CONDENSATE HANDLING
  17. CLEANING A/C EQUIPMENT
  18. DUCT SYSTEM DEFECTS
      SUPPLY REGISTERS, & ZONES
      RETURN AIR REGISTERS & DUCTS
      BALANCING AIR DUCT FLOW
      UNDERSIZED RETURN DUCTS
      INCREASING RETURN AIR
      LOCATION OF REGISTERS & DUCTS
      DUCT ROUTING & SUPPORT
      WET CORRODED DUCT WORK
      LEAKY DUCT CONNECTIONS
      VIBRATION DAMPERS
      GOODMAN GRAY FLEXDUCT
      OWENS CORNING FLEXDUCT
      UNSAFE DUCT OPENINGS
      ASBESTOS HVAC DUCTS
      Transite Pipe HVAC Ducts
      FIBERGLASS HVAC DUCTS
  19. A/C REFRIGERANTS
  20. A/C REFRIGERANT LEAK DETECTION
  21. INSPECTION LIMITATIONS
  22. CRITICAL DEFECTS

Technical Reviewers

  • Thanks to Mark Cramer, Tampa Florida, for assistance in technical review of the "Critical Defects" section and for the photograph of the deteriorating gray Owens Corning flex duct in a hot attic. Mr. Cramer is a Florida home inspector and home inspection educator.
  • Thanks to Jon Bolton, an ASHI, FABI, and otherwise certified Florida home inspector who provided photos of failing Goodman gray flex duct in a hot attic.
  • Thanks to Alan Carson, Carson Dunlop, Associates, Toronto, for technical critique and for providing a copy of Carson Dunlop Weldon & Associates Technical Reference Guide to manufacturer's model and serial number information for heating and cooling equipment ($69.00 U.S.).

Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.


AIR CONDITIONING SYSTEMS
A/C COMPONENTS
CONTROLS & SWITCHES
A/C DATA TAGS
A/C TYPES, ENERGY SOURCES
RATED COOLING CAPACITY
AIR CONDITIONER BTU CHART
SEER RATINGS
OPERATING COST
SYSTEM OPERATION
OPERATING TEMPERATURES
OPERATING DEFECTS
LOST COOLING CAPACITY
COMPRESSOR CONDENSER
AIR HANDLER UNIT
AIR FILTERS for HVAC SYSTEMS
CONDENSATE HANDLING
CLEANING & Legionella BACTERIA
DUCT SYSTEM DEFECTS
FAN AUTO ON CONTROLS
A/C REFRIGERANTS
A/C REFRIGERANT LEAK DETECTION
A/C DIAGNOSTIC FAQs
INSPECTION LIMITATIONS
CRITICAL DEFECTS
More Information

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Air Conditioning
InspectAPedia Bookstore
Electrical
Environment
Exteriors
Heating
Home Inspection
Insulate Ventilate
Interiors
Mold Inspect/Test
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Roofing
Structure
Accuracy & Bias Pledge
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More Information on Building Diagnostic Inspections and Repairs

For more information about fiberglass as an indoor air quality concern see:

For more information about asbestos as an indoor air quality concern with focus on easy ways to identify asbestos materials in buildings, see:

goto InspectAPedia.com - authoritative, in-depth Building Diagnostic and Repair Information for building buyers, owners, inspectorsInspectAPedia TM Home & Site Map - Building Inspection, Diagnosis, & Repair, Environmental Inspection & Testing - Research Website

GO TO the MOLD and INDOOR ENVIRONMENT INFORMATION CENTER for in-depth advice on avoiding testing for or cleaning up mold and other indoor environmental hazards, odors, gases, contaminantsThe Mold Information Center: What to Do About Mold in Buildings, When and How to Inspect for Mold, Clean Up Mold, or Avoid Mold Problems

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CONTACT Daniel Friedman - Dan is a senior ASHI home inspector, nationally recognized expert on building inspection, building failures, and sick building investigationContact Daniel Friedman for website content suggestions or for fee-paid consulting

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07/30/07 - 01/31/2006 - Created 3/28/95 www.inspect-ny.com/aircond/aircond18j.htm - Web page design & content © 2007 Daniel Friedman All Rights Reserved