Dumb question: where does the air come into a room from?

[OM2]

I asked for advice on heating in my house
Some of the advice I got was to use draught excluders
I've only just now got round to fitting these
(Hmmm... I wish I'd done this when it was *really* cold!)

But that's got me thinking... if I perfectly seal around all windows where I had draughts - where does the air come into the rooms from!!

OK... that sounds like a dumb question

In only 2 of the rooms in the house, I can see air vents
I can't see anywhere else - 3 bed house

So in theory, if someone did a perfect job and used draught excluders on windows and doors - then there would be a chance that air wouldn't come in!!!

What am I missing?


OM

 

[freddiemercurystwin]

The air will get in through the floor, walls, skirting, through light/plug sockets/light fittings etc etc. Seal a house up too much and you'll get condensation problems. That's why trickle vents in windows are mandatory these days.

 

[OM2]

walls and floors?
there's no holes in them though

 

[freddiemercurystwin]

Yes all the little cracks and the corners between them etc, surprising where air can get in, as mentioned not always a bad thing.

Air leakage testing is now mandatory for new homes, there's now a whole industry devoted to it.

 

[OM2]

ok, thanks
good to know

 

[ajrobb]

Did I really read that the EU are looking to ban uncontrolled ventilation in future building regulations? It sounds like we are headed towards living in hermetically sealed bubbles with mechanical ventilation.