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U values

  • 18-04-2013 10:44AM
    #1
    descol
    Registered Users, Registered Users 2 Posts: 156 ✭✭


    Hi
    Could anyone assist please -
    Question :
    In an external cavity wall - If in lieu of a window - how does one deal with an aluminum ventilation grill - where could I source a U value ?
    thanks
    descol


Comments

  • #2
    sydthebeat
    Subscribers, Paid Member Posts: 44,862 ✭✭✭✭sydthebeat


    descol wrote: »
    Hi
    Could anyone assist please -
    Question :
    In an external cavity wall - If in lieu of a window - how does one deal with an aluminum ventilation grill - where could I source a U value ?
    thanks
    descol

    as the vent is a hole, then it has no u value.

    what exactly are you trying to find out?

    methinks you are confusing air tightness and u values

    u values are a measure of heat loss through elements of the build


  • #3
    MOTM
    Registered Users, Registered Users 2 Posts: 412 ✭✭MOTM


    +1. It would be considered to have a ventilation loss rather than a conductive "fabric" loss.


  • #4
    descol
    Registered Users, Registered Users 2 Posts: 156 ✭✭descol


    thanks - got it sorted - early morning confusion


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