Which of the following statements about ductless hoods is true?

Ductless hoods, commonly found in kitchen ventilation systems, function by filtering air instead of expelling it outdoors like ducted hoods. The correct statement indicates that ductless hoods can indeed be utilized when another form of ventilation exists. This means that even in scenarios where an alternative ventilation system is in place, a ductless hood can supplement air filtration without the need for external ductwork.

Ductless hoods rely on charcoal filters to remove odors and impurities from the air, making them a versatile option when exhaust flues are unavailable or impractical to install. They are particularly useful in apartments or homes where structural factors limit the ability to install ducted systems. With additional ventilation in place, such as windows or exhaust fans, the overall air quality can be enhanced, making the use of ductless hoods a beneficial addition.

The other statements do not accurately reflect the features and regulations associated with ductless hoods. For instance, ductless hoods are not the sole option for kitchen ventilation; various systems are available depending on kitchen design and specific needs. Furthermore, while ductless hoods do not require termination in the same way that ducted hoods do, they still require filters that need routine maintenance. Lastly, ductless