DIY Doctor UK DIY Forums

I have a potterton suprima 30 boiler in a kitchen cupboard (on an outside wall). I've been told it needs vents high and low of 99cm2 each. [b]But what does this mean? [/b] I don't have a clue what size vents I need to buy or where I can get them from! I've looked in a couple of DIY shops and none of the vents seem to match this 99cm2 size! Thanks[/b]

See this project

https://www.diydoctor.org.uk/projects/boilerhousing.htm

99cm2 means an opening area of 99 centimetres squared. Area is worked out by width times height. so a grill 10cm by 10cm is 100cm2.