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Furnace

skoniskoni Member
in Questions & Help
I would like to automatic start the extractor hood as soon as I turn on the gas from the furnace.

Now I have been searching for the right flow swith to measure that. bit can't find a good (pricebly) one.

The idea is to start the extractor as soon as one of the gas burners is started.
So I need to measure a gas flow. 

Maybe any ideas ?

Comments

  • iTSMeiTSMe Member
    Measure the temperature above the furnace and use that as trigger.
  • skoniskoni Member
    I am afraid that if the gas in on a low setting there will be not enough temp. raise to trigger.
  • EternityEternity Member
    Burnt gas results in H2O and CO2, both could be measured and perhaps used to create an ON trigger. Off might be more tricky... 
  • EternityEternity Member
    Or perhaps you light the gas with a built in ignition? That use of electricity could me measured and trigger the hood.... But off is a problem. 
  • skoniskoni Member
    Eternity said:
    Or perhaps you light the gas with a built in ignition? That use of electricity could me measured and trigger the hood.... But off is a problem. 
    Tried that. Current is to low..no amps show up in the coolcam
  • EternityEternity Member
    Or...a motion sensor in the hood, aimed at the burners. The hood starts when motion is detected, being it a pan placed or a hand waved. Combined with a countdown timer to keep the hood active. And perhaps an extra motion sensor in the kitchen that also retriggers the timer
  • skoniskoni Member
    A motion sensor will not cover the situation. When there is no motion it will turn off the hood. 
    Oke you can put in a delay but it isn't the sollution i was hoping for.
    Maybe it is a project that's not that easy.
  • JPeJPe Member
    edited February 2018
    https://www.indiegogo.com/products/oval-the-first-all-in-one-smart-sensor-system

  • skoniskoni Member
    Nice, but expensive. 

  • JacobCaseyJacobCasey Member
    edited April 2018
    Yes, it can be done but a little expensive. Maybe it will be good to consult a professional heating service NJ for an advice. They are the one with the correct knowledge and may tell the most convenient way to measure it. 
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