Packaging Size & R-Value

Why are JPL Flexible Air Duct Packages Longer than some of the Competitor’s Packages??

Customers may comment that JPL products are packaged in containers longer in length than several of our competitor’s.  The length of JPL’s package (both cartons & poly-bags) is governed by two simple rules.

  1. The finished product cannot be damaged or distorted by excessive compression.
  2. The insulated finished good must fully recover and meet the specified R-Value listed on the product.

What does R-Value have to do Duct Compression? 

Fiberglass insulation has a recovery limit.  Compress beyond this limit and the ability of the fiberglass to recover to its stated R-Value disappears.  Owens Corning, a leading FDM fiberglass manufacturer, recommends that the length of longitudinal compression be less than a 12:1 ratio to meet the thermal properties listed on the duct.  This means that a 25’ piece of insulated flexible duct should be compressed into a package no less than 25″ in length.

JPL’s R4.2 and R6 x 25’ insulated flex ducts are all packaged in 26” long poly-bags and cartons.  JPL’s R8 x25’ flex ducts are packaged in 33” containers to ensure that the R8 fiberglass recovers completely and the product is not damaged or distorted in anyway.

What Can Excessive Compression Do to Product Quality?

Fiberglass insulation relies on layers of trapped air to prevent heat and cold from traveling through it.  If these layers are damaged due to over compression more heat and cold can freely escape leading to thermal inefficiency in the air distribution system.  This loss of insulation thermal values leads to increased energy usage and an increase in electrical bills. Secondly, excessive compression of flex duct in a package can result in overall length shrinkage, making it difficult for installers to extend the flex duct to its’ full 25’ length.

R-Value & Quality Assurance Trump Additional Package & Freight Costs.

JPL’s attention to detail on correct packaging demonstrates JPL’s commitment to ensure that each piece it manufactures meets all customer and code requirements.  Compromising quality & reputation to reduce packaging and freight cost is not in the best interest of our customers or the end user.


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