Thermal Insulation and Duct Liner
Thermal Insulation and Duct Liner
(OP)
I think that thermal insulation is used primarily to maintain the supply air temperature and condensation second. Duct Lining is for sound attenutation. I often heard co-workers saying that if the duct is lined, it doesn't need to be insulated because the liner takes care of the condensation. I thought that it should be both insulated and lined. For example the first 20 feet of duct from the Air Handler, it should be lined for sound attenuation and insulated for thermal reasons. What's the real reasons of insulating and lining?





RE: Thermal Insulation and Duct Liner
Indoor duct work with a liner and external insulation is a waaste of money in my opinion
You can run exposed spiral duct, its double wall meaning it has internal insulation and then an internal perf lining. This application is not uncommon.
The way we build has a far greater impact on our comfort, energy consumption and IAQ, than any HVAC system we install
RE: Thermal Insulation and Duct Liner
TTFN
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RE: Thermal Insulation and Duct Liner
IAQ concerns are starting to steer away from internal lining these days. The growing preference is to use real acoustic silencers with perf steel liner and sometimes mylar, rather than have the liner deteriorate over time and dust the space with fiber.
RE: Thermal Insulation and Duct Liner
Have a sound attenuator at the discharge of fan, insulate the ductwork and design it at an appropriate velocity to minimize the noise due to air in the ductwork.
RE: Thermal Insulation and Duct Liner
RE: Thermal Insulation and Duct Liner