Having to have the pleasure of having a Warm Front Ideal system fitted, 4 yrs ago, isar he 24, it was fitted in a small room, pantry, and he wanted/did cut a hole in my door, and fitted a slidding vent, he should not of done that, should he??
without checking the MIs, I don't think the Isar needs a vent, if that is the case then there was no reason to cut a hole in your door but to say he SHOULDN'T do it is a bit strong, a sliding vent, I assume you mean one that closes, is not a suitable vent for a gas appliance.
The MIs actually state i didn't actually need any vent. I asked him that, and he said i had to have one. Yes, i never actually thought of it having to be permanantly open.
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