Outdoor Ductwork Insulation
Outdoor Ductwork Insulation
(OP)
In the project I am working on, the existing outdoor air-conditiong (heating and cooling) duct was insulated with 1-1/2" fiberglass and aluminum vapor barrier jacket. However, the insulation at the bottom of the duct always got wet after rain, and already become loose now only after a couple of years new installation.
Has anyone had similar experience or any suggestion what's the best insulation and finish for the outdoor duct?
Thank you very much.
Has anyone had similar experience or any suggestion what's the best insulation and finish for the outdoor duct?
Thank you very much.





RE: Outdoor Ductwork Insulation
Option 1: Exterior thermal wrap of min. 2" foil faced duct thermal wrap rigid board insulation, with a re-covering of 0.8mm aluminum sheet, lapped and sealed weatherproof with band clamps on 600mm centres.
Option 2: Internally lined duct insulation with the sheet metal duct as the outer surface, sealed and waterproofed.
Additional enhancements for institutional/better quality: Use option 2 with perforated liner on the insulation, and another exterior double wrap of bituminous/asphaltic coating impregnated fibreglass cloth (which could also apply to Option 1, as well). Then a re-covering with 0.8mm aluminum sheet for heat reflectance.
Yeah, expensive, but depends on how long you want this to last and what the energy losses are.
RE: Outdoor Ductwork Insulation
Thanks again for help.
RE: Outdoor Ductwork Insulation
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RE: Outdoor Ductwork Insulation
RE: Outdoor Ductwork Insulation
RE: Outdoor Ductwork Insulation
RE: Outdoor Ductwork Insulation
Could you please give me some manufacturers for the Option 2 with exterior enhancement?
Thanks again for help.
RE: Outdoor Ductwork Insulation
RE: Outdoor Ductwork Insulation