General > General Technical Chat

My apartment's bath fan caught on fire

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amyk:

--- Quote from: tom66 on June 21, 2020, 03:38:44 pm ---If I recall correctly expanding foam is usually "expanded" using butane inside the cylinder.  I don't know if that remains after the foam is set, but if it does, it almost certainly helps accelerate the process!

--- End quote ---
Closed-cell foam will contain trapped blowing agent (which may slowly seep out over time), whereas it will dissipate quickly in open-cell foam.

I'm not sure that they'd use something as flammable as a hydrocabon; they are usually something nonflammable like a HFC (used to be a CFC --- and in China, maybe they are still using CFCs). Foam is really a form of plastic but what makes it so flammable is its huge surface area.

Mr. Scram:

--- Quote from: bill_c on June 11, 2020, 04:33:10 am ---Make sure you have smoke detectors properly installed and that the batteries are changed as needed.  You can't smell smoke while you sleep. Without  a functioning smoke detector, you will not wake up as the place fills with smoke. Without  a functioning smoke detector, you will not wake up as the place fills with smoke. Yes, it is worth repeating as many times as needed.

I mean everyone, every house, not just pigrew.

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I know people who got lucky and were woken up by the sound of the raging fire breaking glass. That's cutting it close. But yeah, smoke detectors are cheap and improve your chances hugely. Even if you're awake it may buy you those 30 seconds between a bad day and the last day of your life, or a loved one's. People have no idea how quickly a fire can escalate.

Jeroen3:
PU foam should contain flame retardants like TCPP. But yes, they still use isobutane, dimethylether and propane as propellant.

I mounted a few of these AFFF foam units around the house. Fire is really scary.

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