duct work smoke detector

Dave Palmer_3

ever hear of a smoke detector or sensor to be mounted in warm air duct work? Not a heat sensor but smoke,inspector wants one,I said I never heard of such a device and where would I buy it and does he know a company that does,he said I must not be a professional(my tongue is still bleeding)its a very common item.Guess I'm just a dumb boiler guy not a warm air pro.thanks Dave

ed wallace

duct smoke detector

Johnstone suppy carries them if you need an adress for nearest Johnstone suppl i can tell you where they are

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BillW@honeywell

Our Commercial division makes them...

Part number is 14506873-002, and they work with the T804C photoelectric or the T805C Ionization type smoke detectors. They are designed for commerical fire protection systems, not for home use. Go to http;//hbctechlit.honeywell.com and type in those numbers for a tech sheet. Available from commercial-oriented Honeywell distributors.

steve novak

They are used on commerical jobs that we work on all the time. I think in NJ they are required on any RTU or air handler 5 tons or larger. I have never seen a residential install but that definately does not mean they are not out there. The commerical models mount to the return and or supply duct depending on spec and have a smoke tube (basically 1/2 emt with holes drilled in it) inserted into the duct work. If smoke is present in the dector it triggers the fire alarm and shuts down the unit.

These are the ones we use http://www.systemsensor.com/pdf/A05-0301.pdf and this page is the full line up of models http://www.systemsensor.com/html/hvac.html

Dave Palmer_3

thanks

you guys are quick,furnace is on the third floor, been there forever but fire marshall wants these detectors.We cement boarded walls and floor and moved furnace 3 inches from wall to get proper clearances added co detectors.All good changes just never heard of duct detectors before.thanks Dave

seabee570

duct detectors

like previous posters said...they are almost always required in commercial buildings....some commercial air handlers also have fire-stats...these sense high temperature in the duct,and shut fan down when high temp detected...never seen them used in residential..not a bad idea...

John T_2

Blower

Dave, the intended use is to shut down the blower upon sensing smoke not just the burner. We usually switch the 24 volts secondary "R" right off the transformer.

John