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Running Flexible Beside Metal

2058 Views 11 Replies 5 Participants Last post by  Bob Mariani
Hello!

Is it OK to run a flexible duct along side a metal duct? I'm installing a heat/light/vent unit in a basement bathroom and just want to make sure that I'm not creating a potential fire hazard if the ducts were to be touching each other. I don't think so...but just want to clear the question out of my mind!

Thanks for your help!

Mark
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Your furnace discharge air temp shouldn't be high enough to start a piece of paper on fire(roughly 460°F).
Let alone transfer enough heat to another pipe to start a fire else where.
 

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Are you thinking of using those plastic flexible ducts?

If this is a duct for the bath exhaust go with a smooth rigid metal duct. Also, slope it towards the outside in case you get condensation building up inside it...another reason to avoid flex duct with ridges. You can also insulate it. Just my preference.
 

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A nice extra is a timer switch. Smell will linger in the room after you leave, so it's nice to have the fan running an extra 5 minutes or so after to clear out the odor.

Of course it's not necessary if you can remember to come back later and turn off the fan. :)
 

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A nice extra is a timer switch. Smell will linger in the room after you leave, so it's nice to have the fan running an extra 5 minutes or so after to clear out the odor.

Of course it's not necessary if you can remember to come back later and turn off the fan. :)
Moisture too, since this is what the fan is designed for. Now it CT we are required by code to use a timed switch for the fan and it needs to be tied to the light so it will always get used.
 
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