![hvac - Is the ventilation in my utility closet a construction mistake? - Home Improvement Stack Exchange hvac - Is the ventilation in my utility closet a construction mistake? - Home Improvement Stack Exchange](https://i.stack.imgur.com/tazbc.jpg)
hvac - Is the ventilation in my utility closet a construction mistake? - Home Improvement Stack Exchange
![Should my furnace closet have this huge duct opening into the unconditioned vented attic? - Home Improvement Stack Exchange Should my furnace closet have this huge duct opening into the unconditioned vented attic? - Home Improvement Stack Exchange](https://i.stack.imgur.com/7g5PM.jpg)
Should my furnace closet have this huge duct opening into the unconditioned vented attic? - Home Improvement Stack Exchange
![Combustion air: how to provide adequate combustion air for combustion appliances in newer tighter buildings and in older homes that have been made more airtight - Solar Age Magazine Combustion air: how to provide adequate combustion air for combustion appliances in newer tighter buildings and in older homes that have been made more airtight - Solar Age Magazine](https://inspectapedia.com/Energy/Combustion_Air2c.jpg)
Combustion air: how to provide adequate combustion air for combustion appliances in newer tighter buildings and in older homes that have been made more airtight - Solar Age Magazine
![Question on residential utilities closet: I understand proper amount of ventilation is needed but is this duct that vents from attic space into the utility closet, (with furnace and water heater) necessary. Question on residential utilities closet: I understand proper amount of ventilation is needed but is this duct that vents from attic space into the utility closet, (with furnace and water heater) necessary.](https://i.redd.it/wf7bhhb7kwc81.jpg)