Sources of air

How much air do you let into your motorhome?    I'm currently on the top of a hill and in receipt of gale force winds and so I can identify the main areas that air can enter my 2011/12 Nuevo van:
1.  Over the top of the fridge
2.  Under the bottom of the fridge
3.  Over the rear near side wheel arch, into the rear seat box and from there into the van
4.  From the vent at the back of the microwave
5.  From the bottom of the habitation door
6.  From the midi heki

Well the first two surprise me as I always thought the back of the fridge should be completely isolated from the van to avoid monoxide poisoning.     Ditto for the third source as the wheel arch is at the back of the fridge (I think it is anyway - it's raining so hard I'm not going outside to find out at the moment).   So my question is, is there any reason I should not seal up 1, 2 & 3?

Number 4 I'll seal up because I don't use a microwave and so have removed it to gain a little storage.

Number 5 I'm told it's supposed to be like that, so I might just drop a towel down there when I think it's letting in too much air

Number 6, the heki has no seal so I've ordered one.   Yes I know air needs to get out but I can crack open a window on the lee side or the heki if I find it stuffy.   Or remove the seal if it does make it stuffy all the time.

https://www.autosleeper-ownersforum.com/t9613-dangerous-design-fault

This has been recently thrashed out in the thread link above.

Peter

Hi, if you use gas for any reason in your van you need ventilation.  Not just in case of a leak but as a result of combustion .i remember the ventilation area, it was worked out very carefully on a boat that I had.
regards
mike

Thanks for link.   It looks very interesting and look forward to reading it.