Boiler Room Door Vents

There are 3 doors one for my tool room and 2 next to boiler in front of boiler one on the side.

Boiler room door vents.

The space does have a basement window and the room is not air tight i also have also added a vent to the rest of the basement with a standard ac return vent. I want to close these doors. Gulrear sliding door air conditioner kit max adjustable length 220cm 87inch sliding door ac vent kit suit for 13cm 5 1inch exhaust hose 4 3 out of 5 stars 417 48 99 48. The unfinnished area of your basement may give you the volume you need.

This also means that the cupboard should not be airtight. Both the doors have fire guards on them. So you may be able to just add vents registers through the inside wall to get the combustion air you need. Or you need to have combustion vents ducts.

Lets say you have a boiler room we call it a. The room needs 50 cubic foot of free volume for every 1000 btu s input. The boiler is 125k btu input and the hot water heater in 45k btu input. The room does get rather warm during boiler operation but i am most concerned about not having enough combustion air.

The air that s in the cupboard is sufficient for the boiler to do this so long as these clearance measurements are in place. Lets say input rating of your boiler is 110 000 btu and your wh is 40 000 btu total rating in room a is 150 000 btu. The boiler and wh located there and room b is the open basement space. I keep the doors next to the boiler open at all times.