I have a very old furnace (HVAC) in a utility room (basement) with slatted door that’s very loud and was wondering if I could enclose the utility room (with mineral wool and solid doors) by adding vents (for air combustion intake) to the adjacent room (tool room) to the utility room? The HVAC has a air return from the rooms but no air intake from outside. Is it feasible and is it safe?
Pictures below to get an idea of the layout. If it helps we live in New Jersey, 1954 split level house.
The furnace is a 120,000btu and model number PBKM-LD20N120 (manual link furnace manual , the furnace and water heater have exhaust pipes leading to the chimney.