CKD Appliances & Kitchen Ventilation Flashcards

What is the recommended minimum width of a range hood relative to the cooking surface below it?

Answer: 3 inches wider on each side than the cooktop

Range hoods should extend at least 3 inches beyond each side of the cooking surface to effectively capture rising vapors and grease.

What is the primary disadvantage of a recirculating (ductless) range hood compared to a ducted hood?

Answer: Cannot remove heat and moisture from the kitchen

Ductless range hoods filter grease and odors through charcoal filters but recirculate air back into the kitchen, unable to remove heat and moisture.

What is the recommended mounting height range for an under-cabinet range hood above a gas cooking surface?

Answer: 24–30 inches

Under-cabinet hoods over gas cooking surfaces are typically mounted 24–30 inches above the grates for optimal capture without creating a fire hazard.

What is 'makeup air' in the context of kitchen ventilation design?

Answer: Replacement air supplied to compensate for air exhausted by a range hood

Makeup air is replacement air that must be supplied to a kitchen when a high-CFM hood exhausts large volumes, preventing negative pressure and backdrafting.

Which type of range hood is suspended from the ceiling above an island or peninsula cooking surface?

Answer: Island (ceiling-mount) hood

Island or ceiling-mount hoods are suspended from the ceiling over cooktops on islands or peninsulas where wall mounting is not possible.

What is the primary limitation of a downdraft ventilation system compared to an overhead hood?

Answer: Less effective at capturing rising steam and vapors

Downdraft systems pull air downward across the cooking surface, but rising steam and vapors naturally move upward, reducing capture efficiency compared to overhead hoods.