Huge hole from removed heater = fill or install air vent?

[MikeyB86]

Hi there.

Bit of a clueless DIYer here. I had a very old gas heater removed (in extension) and gas pipes removed. But it's left a huge hole behind. I'm not sure whether to install vent for the extension as it will now be open plan with the kitchen...

The kitchen has 1 small vent and will have electric oven/recirculation hood. The big issue for me is keeping the extension warm as will be re-laying ceiling (but there's a lot of glass in there). But I also don't want the room to be full of condensation?

So block up to keep warm or vent?

Ps sorry for the mess.

 

[denso13]

Vent is easier but it will be draughty. If it was me I'd block it up.

 

[Madrab]

More importantly, I presume that's the old external wall coming down? I hope there's a steel up there, either that or I'd get some acro props in there smartish if it was me.

I'd just make good that old hole and seal it up too.

 

[ianmcd]

Just seal the hole up and make good