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City/County Vehicle Gallery

Insulated exhaust ducts from bathrooms or kitchens

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Does the exhaust from a bathroom or kitchen vent need to be insulated. Per R403.3.1?351513795_R-6requirement.thumb.jpg.cbd2a7e331b42dfda2c41626f990e479.jpg303.5.1. Opening protection shall be in accordance with Section R303.6

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  • Member

No.  They are for exhaust only.  Only heated or cooled air ducts need to be insulated.

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  • Member

Thank you

  • Administrator

As a retired HVAC contractor and Mechanical inspector, there are times that those ducts need to be insulated.  if they form condensation, they will need to be insulated.  I have seen cases where the kitchen hood will literally rain on top of the range during cold weather.

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Dennis N. Maidon
Webmaster - GACE Online
dmaidon@gaceonline.com

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