Qtr141897 Posted March 25 Report Share Posted March 25 We have three storey purpose built blocks of flats. One entrance and one stairwell with lobbied approach to flats. Built in the 90’s. There are 2 x AOVs which have gas canisters to open the AOVs in two of the blocks. These no longer work and cannot be tested. 3 of the other blocks, there are Velux windows (not AOVs). Would it be possible for these to be turned into openable Velux windows as opposed to AOVs or do they need to be AOVs? If they need to be AOVs do the other blocks need to be changed. Quote Link to comment Share on other sites More sharing options...
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