Return air intake for a forced air furnace may be taken from all the following locations except ______.

Return air intake for a forced air furnace may be taken from all the following locations except ______.

• A. hallway
• B. bedroom
• C. living room
• D. kitchen or toilet room

Answer: (D)

Return air should come from spaces that are part of the heated, living area and that provide clean, reasonably balanced air for circulation. Kitchens and toilet rooms are not suitable because they generate contaminants that are carried back into the system: cooking grease, odors, and high humidity from showers or toilets can be drawn into the furnace and spread throughout the house, causing odors, excess moisture, and dirt buildup in filters and ducts. Hallways, bedrooms, and living rooms are typical sources because they are normally conditioned spaces with lower levels of immediate, concentrated contaminants. Therefore, the location that is not appropriate for return air intake is the kitchen or toilet room.

Return air should come from spaces that are part of the heated, living area and that provide clean, reasonably balanced air for circulation. Kitchens and toilet rooms are not suitable because they generate contaminants that are carried back into the system: cooking grease, odors, and high humidity from showers or toilets can be drawn into the furnace and spread throughout the house, causing odors, excess moisture, and dirt buildup in filters and ducts. Hallways, bedrooms, and living rooms are typical sources because they are normally conditioned spaces with lower levels of immediate, concentrated contaminants. Therefore, the location that is not appropriate for return air intake is the kitchen or toilet room.