14"-Inch R6 Insulated HVAC Flexible Air Duct - 25' Feet Length
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14" Inch R6 Insulated Flexible HVAC Air Duct – 25 Ft
The 14"-inch R6 insulated flexible air duct (25' ft length) is engineered to deliver reliable airflow while reducing energy loss in HVAC systems. Its R6 insulation helps maintain consistent air temperatures, improving overall system efficiency.
With a full 25'-foot continuous run, installers benefit from fewer connections, reduced leakage points, and faster installation times. The flexible inner core simplifies routing through tight spaces, while the reinforced vapor barrier protects against moisture intrusion and condensation.
This duct is commonly used in residential homes, apartments, and light commercial buildings for both HVAC supply and return air applications.
Common Applications:
- Residential & Commercial HVAC Systems
- Supply & Return air distribution
- Attic & crawlspace ducting
- Branch duct runs
Installation Tips:
- Secure with secure duct strap hangers/bands
- Seal connections with mastic or HVAC UL-listed foil tape
- Avoid sharp bends to maintain airflow efficiency
- Support duct per local building code requirements
Frequently Asked Questions
What does R6 mean on insulated flex duct?
R6 refers to the insulation R-value of the duct. Higher R-values help reduce heat gain or loss and minimize condensation in attics, crawlspaces, and other unconditioned areas.
Is this 14-inch flex duct sold in 25-foot lengths?
Yes. This 14-inch insulated flexible air duct is supplied as one continuous 25-foot length, which helps reduce joints, installation time, and potential air leakage.
Can this 14-inch R6 insulated flex duct be used for supply and return air?
Yes. It is suitable for both HVAC supply and return air applications in residential and light commercial systems when properly sized and installed.
Can insulated flex duct be cut to length?
Yes. The duct can be cut to the required length. After cutting, the inner core should be secured and sealed, and the insulation and vapor barrier should be properly reattached to prevent air and moisture leaks.
How should 14-inch insulated flex duct be connected and sealed?
The inner core is typically secured to a collar using a clamp or draw band and sealed with mastic or UL-listed HVAC foil tape. The insulation and outer vapor barrier are then pulled over the connection and sealed.
How often should insulated flex duct be supported?
While local codes vary, a common best practice is supporting insulated flex duct every 4 to 5 feet using wide straps to prevent sagging and airflow restriction.
Is R6 insulated flex duct code compliant?
R6 insulated flex duct is commonly accepted for residential HVAC installations, but insulation requirements vary by climate zone and local code. Always verify local code requirements before installation.
What is the purpose of the outer vapor barrier?
The outer vapor barrier protects the insulation from moisture and helps reduce condensation, especially in humid environments such as attics and crawlspaces.
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