3 ms·

There are regulations[1] in the UK too. We've had new UPVC windows installed over the past few years and they've all got hidden 'trickle' vents. [1] https://w

by rikkus 8y ago

There are regulations[1] in the UK too. We've had new UPVC windows installed over the past few years and they've all got hidden 'trickle' vents. [1] https://www.gov.uk/government/publications/ventilation-approved-document-f https://www.gov.uk/government/publications/ventilation-appro...