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13 years13 yearsalanhc posted:
Whirlybird air vents
Whirlybird air vents
A few eve vents would represent a minimal cost, so adding them can only assist in ventilation through the roof cavity. You'd need about 70 holes (100 x 10mm)…
13 years13 yearsalanhc posted:
Whirlybird air vents
Whirlybird air vents
I too have examined vents. I have seen some measured performance data on various roof vents which is available from this page (the link to the data is above…
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17 February 2011