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How would you solve this problem

  1. Oct 15, 2011 #1
    Vent in a floor, the vent is designed to remove waste gases from a heating system and consists of a grill cut into a timber floor. (15cm x 15cm in size)

    The floor the vent is fixed into is suspended above ground and is exposed so that wind and other external factors can have an affect on how much air is drawn through the vent in certain weather conditions. ie strong winds draw out more air from the internal structure.

    My question is this, what measures could be taken to reduce air loss through the floor vent in high wind conditions without covering the vent or hindering safe removal of waste gas?

    Thank you gentlemen.
  2. jcsd
  3. Oct 15, 2011 #2


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    Baffles, or better yet some solid enclosure.
  4. Oct 15, 2011 #3
    Would the solid enclosure not restrict the flow of waste gas through the vent?
  5. Oct 15, 2011 #4


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    In actual fact, that was just a "top of my head" response based upon limited input. You really have to provide a lot more information about the situation before anyone can provide a better response. Russ might be your best bet for info on this, since he's the resident HVAC specialist.
  6. Oct 15, 2011 #5
    The vent in the floor is designed to remove waste gas (LPG) it is not required to provide clean air to the building interior.
    The vent is cut into a timber floor and consists of a grill, the grill just vents to the outside.

    The floor is suspended about 60cms from the ground and is open to external elements, primarily wind passing beneath the structure.

    Because the vent is floor mounted and is designed as a safety measure to remove LPG gas waste etc the vent cannot be blocked or covered to reduce air flow.

    My understanding is that as the wind speed beneath the floor increases then so does the amount of air it draws through the vent ( i presume this is because of the difference between internal and external air pressure)

    Is it possible to fit something beneath the floor (and the vent) to reduce the effects the high wind speed would have on drawing air from the internal space, without reducing the removal of waste gas from the LPG heating system?

    I am trying to find a way of reducing the amount of air being drawn through the vent in high wind conditions to the floor space below, while still maintaining safe ventilation of waste gases.

    Thank you

    I hope that is a little more clear
  7. Oct 15, 2011 #6


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    Well, it's a more detailed explanation, but one glaring detail eludes me. Why the hell do you have LPG flying around loose in a structure? It should be either contained or burned. I seems to me that you have a bomb just waiting for an excuse to detonate.
  8. Oct 17, 2011 #7
    Could you make a governor or throttle that will regulate the airflow?

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