Ducted vs Ductless Range Hoods: Which Is Better for Your Cooktop?

Key takeaways

• Ducted range hoods physically remove smoke, heat and humidity outdoors, making them the strongest choice for frequent frying, wok cooking or gas hobs.
• Ductless hoods are easier to install and ideal for flats and rentals, but they rely on filters and are less effective at removing steam and fine grease.
• For light to moderate cooking, a compact visor hood such as the Cookology 60 cm visor cooker hood can be a budget-friendly option in either ducted or recirculating mode.
• Ducted systems usually cost more upfront to install, while ductless systems have lower installation costs but higher ongoing filter replacement costs.
• Your decision should balance building regulations, whether you can vent outside, your cooking style, and whether you own or rent the property.

How ducted and ductless range hoods work

Understanding the basic airflow path of each type makes the rest of the comparison much clearer. Both ducted and ductless hoods use a fan to pull in air from above the hob, but what happens next is different.

How ducted range hoods work

Ducted hoods (also called vented or extraction hoods) pull cooking fumes into metal grease filters, then push the air through ductwork that exits outdoors. The system relies on a continuous path from the hood to an external wall or roof terminal.

Because the contaminated air leaves the building entirely, ducted hoods remove steam, smoke, odours and airborne grease in one go. They are especially effective in larger or open-plan kitchens and for powerful gas cooktops that produce both combustion fumes and heat.

How ductless range hoods work

Ductless (recirculating) hoods clean and recirculate the air back into the kitchen instead of venting it outdoors. Air passes through removable grease filters and then through carbon or charcoal filters designed to trap odours and some vapours.

This design makes ductless units much easier to position, since they do not need a route to an outside wall. However, they can only reduce, not eliminate, moisture and smells, and they rely on regular filter changes to stay effective.

If you cannot easily run ducting to an external wall or roof, that alone is often the deciding factor in favour of a ductless hood.

Smoke, odour and humidity: which performs better?

When you are comparing ducted vs ductless, the biggest concern is usually how well each type handles smoke, odours and steam. The difference becomes more obvious the more heavily you cook.

Smoke and odours

Ducted hoods are generally superior at clearing smoke and strong smells because they physically expel them outside. Provided the ducting is correctly sized and not excessively long, a good ducted system can clear a smoky kitchen noticeably faster than a recirculating hood at the same fan rating.

Ductless hoods rely on carbon filters to absorb odour molecules. These filters inevitably become saturated over time, so smells gradually linger for longer between changes. Strong cooking like fish, curries or heavy frying is much more likely to leave a trace with a ductless setup.

Steam and humidity

Steam and humidity is an area where ducted hoods have a clear advantage. Because all of the extracted air is replaced with fresher air from elsewhere in the home, humidity levels drop quickly, helping protect paint, cabinets and ceilings from condensation and long-term damage.

By contrast, ductless hoods cannot remove moisture from the room. They can trap some grease within the filters, but steam still circulates in your kitchen. In well-ventilated spaces this is manageable, but in smaller, enclosed kitchens it can lead to misted windows, damp patches and quicker wear on finishes.

Energy use and running costs

Running costs have two parts: the energy used by the fan, and any ongoing maintenance such as filter replacements.

Energy and efficiency in everyday use

The fan motor in both ducted and ductless hoods uses a similar amount of electricity at any given speed. However, ducted systems expel warm indoor air outside, which may slightly increase your heating demand. In warm weather, this can be a positive side-effect, as it helps remove excess heat from cooking.

Ductless hoods return the air to the room, so they do not directly affect your heating or cooling needs. This can be an advantage in homes where you want to preserve as much indoor warmth as possible.

Filter and maintenance costs

A key difference is ongoing filter costs. Ducted hoods typically only use metal grease filters, which can be washed regularly and reused. As long as you keep them clean and check the ducting for blockages, there is little ongoing expense.

Ductless hoods use at least one set of disposable carbon filters in addition to washable grease filters. These odour filters must be replaced periodically to remain effective. Depending on your cooking frequency, this can become a noticeable recurring cost over the life of the hood.

Installation difficulty and flexibility

Installation is often where the choice between ducted and ductless becomes most practical. What looks best on paper may not be feasible in your particular home or flat.

Installing a ducted range hood

Ducted systems need a clear route to an external wall or roof. This usually involves cutting through cabinets, walls or ceilings and sometimes dealing with structural elements. For houses, especially during a renovation, this is easier to plan in from the start.

Retrofitting a ducted hood into an existing kitchen can be more complex and expensive if there is no obvious duct route. In flats, external venting may be restricted or require permissions from the building owner or management company.

Installing a ductless range hood

Ductless hoods are much more flexible. They typically require only a power supply and mounting space. This makes them attractive for rentals, flats, or kitchens where cutting new holes through external walls is not allowed or would be very disruptive.

Some slim visor hoods, like compact 60 cm units, are particularly easy to install under a cabinet. Models such as the Cookology visor hood are often supplied ready to run in recirculating mode, with the option to connect ducting later if your layout allows.

Gas vs electric and induction hobs

Your cooktop type is another important factor when deciding between ducted and ductless extraction.

Using range hoods with gas hobs

Gas cooktops produce combustion by-products such as nitrogen dioxide, carbon monoxide in small amounts and extra moisture. Ducted hoods are usually recommended for gas because they expel these gases outdoors rather than recirculating them. For heavy gas use, this can make a noticeable difference to indoor air quality.

Ductless hoods can still be used over gas hobs and are better than no ventilation, but they will not remove combustion gases, only odours and some grease. It is particularly important in this case to pair them with good general room ventilation, such as opening a window during heavy use.

Using range hoods with electric and induction hobs

Electric and induction hobs do not produce combustion fumes, but they still create steam, grease and food odours. Here, the choice between ducted and ductless is more balanced. If you cook lightly, a well-maintained ductless hood may be sufficient for comfort.

If you have an induction hob, you might also consider protecting the glass surface from scratches when not in use. Accessories such as a patterned induction hob protector mat with a design or a larger magnetic silicone hob cover can help keep the surface free from scratches and minor knocks.

Regulations and building considerations

Building regulations and tenancy rules can influence what type of hood you can install. Regulations vary by region, but there are some common themes.

When ducted systems are preferred or required

In many building standards, any mechanical extraction that vents to the outside is considered a strong positive for indoor air quality. In new builds or major renovations, ducted extraction over a hob is often included in the standard specification for this reason.

For powerful gas cookers or ranges, local regulations and appliance installation guides may strongly recommend external venting. Even if not legally mandatory, installers and gas engineers frequently prefer ducted extraction to help manage combustion products.

Rentals, flats and shared buildings

In rented properties and flats, creating new wall or roof penetrations may not be allowed without permission. Even if it is possible, the cost and disruption may not be justifiable if you do not plan to stay long-term.

In these cases, ductless hoods provide a practical compromise that improves day-to-day comfort without altering the building fabric. If you are a tenant, it is always worth confirming with your landlord what kind of work is permitted before committing to ducted installation.

Convertibility and fan power (CFM)

Modern range hoods often blur the line between ducted and ductless by supporting both modes. This flexibility can be very helpful if your circumstances change.

Convertible hoods

A convertible hood can be installed in either ducted or ductless mode. When used ductless, you fit carbon filters and block off the duct outlet; when used ducted, you remove or skip the carbon filters and connect pipework to an external vent.

This offers a good compromise if you are renovating gradually. You might initially run the hood in recirculating mode, then add ducting later when you update cabinets or change the layout.

CFM and extraction power differences

Fan power is often measured in cubic feet per minute (CFM) or cubic metres per hour (m³/h). All else being equal, a ducted hood with the same rated airflow as a ductless one will feel more effective because the air is expelled outside instead of being recirculated.

However, poorly designed ducting with too many bends or an undersized diameter can reduce the real airflow of a ducted system. Keeping duct runs as straight and short as possible, and using the correct diameter, helps your hood achieve its advertised extraction rate.

Houses vs flats, owners vs renters, and cooking styles

The best way to decide between ducted and ductless is to look at your specific situation. Different living arrangements and cooking habits naturally point towards one option or the other.

Homeowners in houses

If you own a house and can route ducting to an external wall or roof, a ducted hood almost always delivers the best long-term experience, especially if you cook frequently. The upfront cost of installation can pay off in cleaner air, less lingering smell and less moisture damage over time.

Owners also have the flexibility to choose between different hood formats, such as under-cabinet, wall-mount or island designs. For more on layout choices, you can explore a guide to range hoods for under-cabinet, wall-mount and island cooktops.

Flat dwellers and renters

If you live in a flat or rent your home, the ability to install ducting may be limited. In this case, a good-quality ductless hood is often the most realistic option. It can still make a noticeable difference if you keep the filters clean and open a window for extra ventilation when cooking heavily.

Because you are more likely to move, it also makes sense to focus on hoods that are easy to remove and refit elsewhere, such as slim under-cabinet or visor models.

Heavy vs light cooking styles

If you regularly deep-fry, stir-fry at high heat, cook with strong spices or use a powerful gas hob, a ducted hood is usually worth the effort. It will cope better with persistent smells and smoke and help maintain comfortable air quality in an open-plan space.

If your cooking is mostly boiling, steaming, baking and light frying, a ductless hood may be sufficient, particularly in combination with a window or trickle vent. For small kitchens and apartments, you can also explore suggestions in a dedicated guide on the best ductless range hoods for small kitchens and apartments.

A useful rule of thumb: the more your cooking fills the room with visible steam or smoke, the more you will benefit from a properly ducted hood.

Simple decision guide: which should you choose?

To pull everything together, you can think of the decision in terms of a few key questions:

1. Can you realistically run ducting to an external wall or roof in your kitchen?
2. Do you cook heavily, especially with gas, frying or strong-smelling dishes?
3. Do building rules or tenancy terms restrict you from altering walls or ceilings?
4. Are you willing to maintain and replace filters regularly if you choose ductless?

If you can vent outside and do a lot of cooking, a ducted hood is usually the best long-term investment. If external venting is difficult or restricted, a ductless or convertible hood in recirculating mode offers a practical compromise that still improves day-to-day comfort.

Once you have decided on ducted vs ductless, the next choice is hood type and features. For a broader overview of options, including downdraft and over-the-hob microwave combinations, you might find it helpful to read about range hood alternatives such as downdraft and recirculating systems.