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Are Window vents enough?

  • 26-02-2009 7:06pm
    #1
    Shorty69664
    Registered Users Posts: 204 ✭✭


    Quick question folks.

    Are window vents enough to meet current building regulations?

    We are currently building and we were only going to use window vents but I was talking to a friend today who is roughly at the same stage as myself. His engineer has told him that window vents are not good enough anymore to meet building regulations and you must have wall vents.

    Just wondering is this correct.


Comments

  • #2
    sinnerboy
    Closed Accounts Posts: 5,433 ✭✭✭sinnerboy


    It depends on the number and type of trickle vents you have installed .

    6500mm2* is required per habitable room - it is possible - but you need to check carefully

    * more in kitchens / bathrooms


  • #3
    Carlow52
    Closed Accounts Posts: 2,389 ✭✭✭Carlow52


    additional issues if heating appliances fireplaces etc fitted
    see
    http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/
    for the various documents for Ireland

    particularly F and J

    How the Queen complies can be found here
    http://www.planningportal.gov.uk/england/professionals/en/1115313971412.html

    [Same document letters apply]

    You might get other ideas here

    http://www.diydoctor.org.uk/


  • #4
    gman2k
    Registered Users, Registered Users 2 Posts: 4,076 ✭✭✭gman2k


    sinnerboy wrote: »
    It depends on the number and type of trickle vents you have installed .

    6500mm2* is required per habitable room - it is possible - but you need to check carefully

    * more in kitchens / bathrooms

    And the 6500m2 roughly equates to the 100mm dia pipe put in for wall vents.
    You can use window vents alright, just do the maths!


  • #5
    sydthebeat
    Subscribers Posts: 41,863 ✭✭✭✭sydthebeat


    one thing that always bugged me about window vents...

    they can be closed completely shut...!!!

    my understanding of the regs is that there needs to be constant background ventilation, anda controllable grill can be used to react to draughs... but how does completely shutting the vent comply??

    also, with air tightness becoming a relevant issue....
    if you get a q50 value of 7 or less..... you need to increase background ventilation by 50%... how will this affect window vents??!?!?!?


    i think this kind of ventilation will become obsolete very soon...


  • #6
    sinnerboy
    Closed Accounts Posts: 5,433 ✭✭✭sinnerboy


    gman2k wrote: »
    And the 6500m2 roughly equates to the 100mm dia pipe put in for wall vents.
    You can use window vents alright, just do the maths!

    or check carfefully ....

    http://www.glazpart.com/glazing/pdfs/bba-overglaz.pdf


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  • #7
    Technophobe
    Registered Users, Registered Users 2 Posts: 1,069 ✭✭✭Technophobe


    Hey guys,

    I have exactly the same question..I wanted to achieve my ventilation requirements through using window vents if possible with additional timer/sensor controlled fans in bathrooms........

    But I am totally ignorant (Sinnerboy..haven't a clue what that link is supposed to show, sorry!!) on all of this and dont even know what questions to ask of potential window supppliers regarding this...:confused:
    ..after all, all or most windows now have some type of trickle ventilation on them but this I presume is not enough...:confused:

    So what do I need to do, dont want vents as such on walls and not sure can afford HRV...????


  • #8
    sinnerboy
    Closed Accounts Posts: 5,433 ✭✭✭sinnerboy


    Ask you window supplier to demonstrate to you that they will fit trickle vents

    And that they will be supplied in such a number and be of such a type that each room will served by 6500mm2 min vent area .

    Also - with respect to any heat producing appliances( fires/ boilers/stoves ) ask those installers to put in writing to you that they are satisfied with the provision of ventilation specific to those appliances . Some appliances will require a PERMANENT vent i.e one you must NEVER close

    Better still - hire an architectural technician :)


  • #9
    Technophobe
    Registered Users, Registered Users 2 Posts: 1,069 ✭✭✭Technophobe


    sinnerboy wrote: »
    Ask you window supplier to demonstrate to you that they will fit trickle vents

    And that they will be supplied in such a number and be of such a type that each room will served by 6500mm2 min vent area .

    Also - with respect to any heat producing appliances( fires/ boilers/stoves ) ask those installers to put in writing to you that they are satisfied with the provision of ventilation specific to those appliances . Some appliances will require a PERMANENT vent i.e one you must NEVER close

    Better still - hire an architectural technician :)


    Hey Sinnerboy,

    thanks for that..will do....

    Only plan on having 1 open fire (sitting room) and possibly a pot belly stove in a living area..For both of these, I have left gaps in my footings to vent them through floor(again not sure exactly if thats correct description or if it matters a jot here:confused:)


    tks


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