Conversion of a gas boiler in the former utility room

Hello everyone,

since we had to create more living space in our house, we converted the utility room into a guest or study room. The room is about 10 m2 in size and has a small dormer window. In the utility room, in addition to the washing machine and dryer, the gas boiler (room air-dependent) is also installed. To keep all three appliances out of sight, I rebuilt the entire area.
After searching the internet extensively, I found no answer (except size of ventilation grille). Can anyone assess this?

Morning

as far as I can see, the fancy ventilation grille wouldn't have been necessary.
on the heating side, there seems to be a concentric exhaust system.

With Mini, Landy u. Co I find the external door hinges cool, but here I would have mounted them concealed even if it costs 2cm of opening width.

Olli

Yes, the hinges are not so great, I agree with you. I made the grid part of it so that at least a little air can get in, it somehow seemed right to me. According to the datasheet, the heater is room-air dependent: wolf gg 2 something