Product Details
The QuietCool R-40 winterized insert is designed for use in extremely cold winter conditions, serving to enhance the R insulation value of the damper box to R-45 when installed during the months that the QuietCool system is not in use. This insert, identified as WI-1430, is compatible with the QuietCool CL-4700 and QuietCool ES-4700 models. It is manufactured in the USA and cannot be shipped to Hawaii.








