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What are Ductless Range Hoods?

Air is drawn into the filter and pushed out the side vents of this range hood.
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  • Written By: Amy Hunter
  • Edited By: Bronwyn Harris
  • Last Modified Date: 14 August 2014
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Ductless range hoods are one of three different types of range hoods, along with ducted, or vented, range hoods and convertible range hoods. Vented range hoods require access to outside from the area in the kitchen where the stove is located. Convertible range hoods can be used with either ductless or ducted systems.

Versions that are ductless are usually the second choice in range hoods. When it is possible to install a hood that can be vented to the outside, that will be the more popular choice, since they expel stale kitchen air directly outside. If the stove is located near a window or against an exterior wall, then installing a vented range hood is a relatively straightforward process. The range hood must be vented outside; it cannot be vented into an attic or an interior wall.

If a kitchen stove is located along an interior wall, or for some other reason a homeowner cannot install a vented range hood, he or she will probably choose a ductless model instead. Ductless range hoods work differently than vented range hoods: they do not pull kitchen air outside, but rather filter the air and then release it back into the home.

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A ductless range hood will not work without a clean air filter. Many use charcoal filters, which make an excellent choice for cleaning the air in a kitchen, because they absorb odor and other residue that can make the kitchen smell unpleasant. If the hood has an exterior aluminum filter, the homeowner will not have to replace the filter, but it will need to be cleaned.

Whichever type of filter the range hood has, it is important that homeowners check it every three to six months. A dirty filter will not only make the range hood less effective, it will also make the motor work harder, shortening its life.

Ductless range hoods are not as effective at cleaning the air in the kitchen as vented range hoods, but for many people, they are the only reasonable option. If the layout of the kitchen prohibits the addition of a vented range hood, then a ductless one can be a good choice. As long as the filters are cleaned or replaced on a regular basis, this version is a very effective way to keep a kitchen smelling fresh.

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anon292077
Post 6

I have a new broan vented exhaust fan over my stove. There is a small vent on the top which forces air out directly into my kitchen. Should this vent be closed off for exterior venting or left open. Are the odors just being blown back into my house because it appears that way?

anon139002
Post 5

@ Post 1: First of all, you're absolutely right. Ductless range hoods are all but useless. Second, if the charcoal filter in that hood has been used for a while, it's become saturated and will no longer absorb odors.

If you're renting for a while, you should consider replacing the charcoal filter with a new one, which will provide *some* filtration (usually for three or four months at least). Also, make sure the grease filter is clean - if it's covered in grease, it won't work too well either. Most grease filters are dishwasher safe, but it's a good idea to check with the hood's manufacturer.

anon114763
Post 4

I am renting an apartment which has a ductless range hood, the one with an aluminum filter. It stinks. It does nothing to remove the smells and is but marginally effective at trapping grease.

Last week I tried to fry some bacon. I then left the hood running over night. Barely any difference by morning. Had to leave the windows open on the very cold day before leaving. If you have this and fry bacon, be ready to have everything in your house smell like bacon for the next few days.

My advice? Kill the salesman who tries to pitch this piece of crap on to you.

@anon26045 - Ducting can be installed inside walls for ranges. My old house had it this way.

Bensmart
Post 3

Great post. I have a similar guide for those of you looking for a guide to purchase a ductless range hood for your home kitchen.

anon26045
Post 1

Is it at all possible to install a vented range hood on an interior wall? Could ducting be installed in walls, floor or ceiling? Just curious if I have to settle for a ductless hood due to stove location, or if there is some way around it.

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