Flex KM is a thermally insulated, fully lined, UL 181 Class 1 flexible air duct designed for low to medium pressure cooling and heating HVAC systems. It can be used in either supply or return sections and provides economical means for handling misalignment between systems components and ducting around obstacles where fabricated and fitted ducts are difficult and costly to use. It is equally suitable for new jobs or retrofit work and is especially useful when making system extensions or for changing conditioned zones, now or in the future.
Compliance to NFPA Standards allows you to install lengths longer than the 14' limitation applying to connectors. It is a highly efficient part of the total duct system because the smooth liner, the ample insulation and tough outer vapor barrier provide good airflow, thermal insulation and a double air seal
Features and Benefits:
Underwriters Laboratories listed for the US and Canada.
Complies with NFPA Standards 90A and 90B.
Corrosion resistant steel wire helix.
Fully lined for efficient air delivery.
The outer vapor barrier is a jacket of fiberglass scrim reinforced metallized film laminate.
Quality KM installations produce referrals that increase volume and profits.
Available in 4.2, 6.0, and 8.0 thermal application values.
Available in both box and bag packaging.
GreenGuard® Gold Certified which is the industry’s most recognized Indoor Air Quality (IAQ) rating.
Made with Owens Corning™ EcoTouch® formaldehyde-free Insulation. Made with 99% natural materials and highest recycled content. Also, it is the only fiberglass insulation listed in the USDA BioPreferred Catalog.
Warning: this product contains a chemical known to the State of California to cause cancer. P65Warnings.ca.gov
24 Pounds (lbs)
14 Inches (In)
20.625 Inches (In)
Country of Origin
20.625 Inches (In)
Greenguard, GreenGuard Children & Schools, Greener Product, CHPS Member
UL Listed - USA & CAN
NFPA 90 A and 90 B
Laminated Polyester Film
Complies With Nfpa Standards 90A And 90B. Corrosion Resistant Steel Wire Helix. Fully Lined For Efficient Air Delivery. The Outer Vapor Barrier Is A Jacket Of Fiberglass Scrim Reinforced Metallized Film Laminate.
*Nu-Calgon Offer valid March 1, 2019 - April 30, 2019. Excludes special pricing. Offer cannot be combined with other offers or programs. While supplies last. No rainchecks allowed. Not valid on previous purchases. Management reserves the right to modify or end this promotion at anytime. All products not available in all areas. Account must be active and in good standing with CE, as determined by CE’s credit department prior to and during the promotion period. Giftcertificates.com voucher will be distributed within 60 days of the conclusion of the promotional term. Returns of eligible merchandise will be subject to deduction of valuation of voucher. Eligible accounts will be notified by telephone or email.
‡Ductless Stock Up and Save offer valid thru May 31, 2019 at participating CE locations. Account must be active and in good standing condition to qualify for terms. Excludes special pricing and all accessories. Special quotes, OEM parts & job pricing excluded. Not valid on previous purchases. Offer cannot be combined with other offers or programs. Management reserves the right to modify or end this promotion at any time without notice. Orders must be placed and taken delivery by May 31, 2019.