A ducted range hood uses a fan and ductwork to pull smoke, grease, heat, and odors from cooking and exhaust them outside the home rather than recirculating filtered air indoors.
If you’re shopping for kitchen ventilation and wondering what ducted range hood means, the short answer is this: it’s the hood that sends cooking pollutants completely out of your house. Unlike ductless models that filter air and blow it back into the kitchen, a ducted system removes moisture, grease, and odors for good. That makes it the preferred choice for serious cooks and anyone with a gas cooktop.
How A Ducted Range Hood Works (And What Sets It Apart)
A ducted range hood captures cooking emissions through its fan, then pushes that air through ductwork to an exterior vent in your wall, ceiling, roof, or floor. The contaminated air leaves the building entirely. This is the fundamental difference from a ductless hood, which passes air through a charcoal filter and returns it to the kitchen. Because ducted hoods don’t rely on filters to trap pollutants, they handle smoke, grease, heat, and moisture far more effectively.
The trade-off is installation flexibility. Ducted hoods require a route to the outside, which means your home’s layout decides whether one is practical. If exterior venting is impossible, a ductless model running on charcoal filters is the alternative, but those filters need regular replacement and cannot match a ducted system’s removal power.
What To Look For In A Ducted Hood: CFM, Sones, And Sizing
Performance comes down to three numbers: CFM, sones, and hood width. CFM (cubic feet per minute) measures airflow—how much air the fan moves each minute. For longer duct runs, interior walls, or island installations, you will need a higher CFM because the air must travel farther and around bends.
Hood width matters just as much. The hood should be at least as wide as your cooktop. For a standard 30-inch range, a 30-inch hood is the minimum, but 36 inches is better for capturing rising steam and smoke before they spread. When calculating CFM needs, never round down, and add a buffer for each duct elbow and turn in the run.
Ducted Installation: What It Requires And Common Mistakes
Installing a ducted hood means connecting it to existing or new ductwork that terminates at an exterior vent. Shorter duct runs on an exterior wall are the most efficient. Interior walls and islands require longer runs and often a more powerful unit. The hood’s fan then pulls cooking air through the duct and pushes it outside.
The most common mistake homeowners make is confusing ducted with ductless. A ducted system must vent outside; assuming any range hood can be installed as ducted is a costly error. Another frequent slip is undersizing CFM for a long or complex duct path, leading to weak performance and lingering kitchen odors. Noise is also easy to overlook: a high-CFM fan without a reasonable sone rating can be too loud for everyday use.
If you’re ready to buy and want a proven selection, check our tested roundup of best ducted under-cabinet range hoods—we cover sizing, noise, and installation fit for real kitchens.
Ducted Vs. Ductless: The Key Differences At A Glance
| Factor | Ducted Range Hood | Ductless Range Hood |
|---|---|---|
| Where air goes | Exhausted outside via ductwork | Filtered and recirculated indoors |
| Pollutant removal | Full removal of smoke, grease, heat, moisture | Partial removal; moisture and heat stay inside |
| Installation flexibility | Limited by where exterior venting is possible | Works anywhere—no duct required |
| Filter type | Grease filters (cleanable) only | Grease filter plus charcoal filter (replaceable) |
| Best for | Gas cooktops, serious cooks, whole-home ventilation | Apartments, retrofits, spaces without exterior access |
Ducted hoods are the standard recommendation whenever exterior venting is feasible. They remove irritants completely and keep your kitchen from turning into a moisture trap. Ductless hoods fill a real need when ducting is impossible, but they should be viewed as a compromise rather than a first choice.
FAQs
Can any range hood be converted from ducted to ductless?
Many hoods are designed for either installation, but not all. Check the manufacturer’s specifications for a ductless conversion kit—some models ship with a recirculation adapter, while others require a separate charcoal filter kit.
Does a ducted range hood need a make-up air damper?
Local building codes often require make-up air for hoods rated at 400 CFM or higher, especially in newer tightly sealed homes. The damper opens to let replacement air into the house so the hood can exhaust effectively without depressurizing the space.
What is the quietest type of ducted range hood?
Units with external or remote-mounted blowers are the quietest because the noisy motor sits outside the kitchen. Among in-hood models, look for those with a sone rating below 3 at your target CFM—they balance sound and performance for daily use.
References & Sources
- Wikipedia. “Kitchen Hood.” Provides the core definition and venting-type comparisons for range hoods.
- KitchenAid. “Ducted vs. Ductless Range Hood.” Covers how each system works and when to choose one over the other.
- ROCIS (Residential Outdoor and Indoor Comfort Institute). “Kitchen Range Hoods Issue Brief.” Industry source on CFM, sones, sizing, and make-up air requirements.