Smoke Detectors

Joined
21 Jul 2008
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Location
Aberdeen
Country
United Kingdom
What is the difference between PHD smoke detectors and 'rate of rise ' smoke detectors?
 
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if its got phd its more intelgent :LOL:

dont know what you mean by phd.

rate of rise does what it says on the tin.

say you have a kitchen and it gets warm/ hot a rate of rise ignores it, but open the very hot oven door and a big gust of heat comes out the rate of rise will activate
 

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