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I have a lever-type door knob on one of my bedrooms and I like it a lot more than the ordinary round knobs. I am considering replacing all the door knobs in the house with levers. Is there any reason to not do this? Why do people use round knobs at all?

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    Related question on User Experience: Why do door knobs still exist? – 200_success Apr 4 '18 at 16:27
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    I had a unpleasant accident with a lever handle few years ago: I was in a hurry trying to go through a door and got my wedding ring to be caught by the lever, then I pulled my hand away from the door causing the ring to bite into my finger deep enough to leave a scar and bend a ring so I was unable to remove it without tools. – n0rd Apr 4 '18 at 17:43
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    Knobs are against code in Vancouver BC now. – Jim W Apr 4 '18 at 20:15
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    Most of the doors in our house use levers, and the one difficulty of note is the tendency to snag. Depending on your height, what you're wearing, what you're carrying, how you move through the door, etc, you could snag your belt loop, shirt or jacket sleeve, the handle of a bag you're carrying, etc. – Hot Licks Apr 4 '18 at 22:02
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    My cat can open lever-doors, but not knobbed ones. That's a big deal to me :) – Steve Apr 4 '18 at 22:06

11 Answers 11

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In my experience, and in general terms...

Knobs are:

  • Familiar (in the U.S)
  • Low-profile (more compact horizontally)
  • Funcional with ambidexterity/symmetry/bidirectionality (operate the same from any side--some levers only function downward)
  • Non-snagging (and slightly more secure for this reason)
  • Less expensive due to production cost and/or sales volume
  • Better suited to some tastes and home styles

Levers are:

  • Familiar (in Europe and elsewhere)
  • Handicap-friendly (and, conversely, not as child-secure)
  • More striking in appearance
  • Swing-specific
  • Likely to catch on straps and clothing on occasion
  • Better suited to some tastes and home styles

Comment addition credit: Matt Lacey, Angew, Ferrybig, Accccumulation

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    Levels are also more friendly to small children and certain pets! – Matt Lacey Apr 4 '18 at 1:51
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    "Familiar" and possibly also "More striking in appearance" is culture-specific. In my part of the world (Czech Republic), you'd be hard-pressed to find a home with knob-style door handles in it. – Angew Apr 4 '18 at 8:05
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    If I'm using my hands to carry something, I can't open knobbed doors with my elbow. – Arthur Apr 4 '18 at 12:55
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    I don't think ambidexstrocity really applies. If your 'off' hand can't push a lever, you have bigger problems :-) – Carl Witthoft Apr 4 '18 at 13:47
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    I wouldn't say "not as child-secure" for a lever, which in case of a fire might make the difference between getting out or not, for a child. We went with levers thoughout the house when the first kid was born, so he could more easily move around. – Jeffrey Apr 4 '18 at 13:56
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It‘s interesting how these things differ among cultures!

In Europe (Germany for sure, but I never observed a difference in other European countries) basically all doors have levers. Here you install a knob only when you need the feature that it becomes more difficult open a door for pets and toddlers.

However, in most of these cases you can already get away with putting the handle upright, so knobs are really rare.

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    This. Knob vs. lever seems to be a cultural much more than a practical thing. For us Europeans, the door knobs so popular in America seem strange and odd. – Tom Apr 4 '18 at 12:16
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    I think it has mostly to do with what manufacturers were making 100 years ago. Most historical buildings in the US have knobs. Levers were rare, and are becoming more popular and common with time. – isherwood Apr 4 '18 at 13:37
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    Europe/Germany: knobs are used here for outside doors (house, garden) where unlocking by key is the predominant use case. These knobs often don't turn at all, they are only for pulling/pushing. – cbeleites Apr 4 '18 at 20:29
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    As a personal anecdote, my building door in France has a knob rather than a lever or handle. Many deliverymen will not even try to open it, thinking you need the key to unlatch it. – Jupotter Apr 6 '18 at 11:19
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    @cbeleites I wouldn't call them knobs at all actually, they're more like handles... – yo' Apr 6 '18 at 12:07
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My wife and I moved into a home with lever door handles. One big downside was our young children, who instantly knew how to open them and escape. You can't childproof these easily either (they have devices, they just don't work as well).

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    Living in a part of the world where people don't use doorknobs, but levers exclusivly; it is common practice (and easy) to change the levers in a vertical position while children are young. They won't be able to open them. – MarkO Apr 4 '18 at 6:18
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    In our house the doors came with useful devices called keys – PlasmaHH Apr 4 '18 at 7:25
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    Note that the keys mentioned by @PlasmaHH are only to protect against accidental door opening. You can buy one that opens all internal doors in all houses for cheap at the hardware store – Suppen Apr 4 '18 at 9:05
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    @MarkO, note that levers sold for the US market can't be easily changed to a vertical position. Well, at least not the major brands that I've been in contact with. – JPhi1618 Apr 4 '18 at 13:58
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    @J.A.I.L. For a lock in a home like that, they generally aren't overly secure locks. I know most knob with locks also have a hole on the other side to disengage the lock by pressing into the hole. The locks are really only for privacy. I assume most lever handles have something similar. – JMac Apr 4 '18 at 13:59
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To add another bullet point to supplement the other good answers: While most exterior doors are pretty close to air tight and security is generally not a concern for interior doors, locks on lever-type handles are typically easy to bypass if there is any sort of gap at the bottom of the door (typical of interior doors). This can be a benefit if you know and trust everyone you live with and a door accidentally gets locked with no one inside the room, but if you have a slightly suspect house mate, round knobs with a security lock have an advantage.

For example, back when I was in college, many students found that they could easily use a clothes hanger to enter their own or someone else's locked dorm room using a clothes hanger underneath the door from the outside to pull down on the newly installed lever-style handles facing the interior of the room. The college replaced all the knobs on the interior side of the dorm rooms as a result.

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    This is entirely a question of lever design. My cat is living proof - she could open the doors in the old place by jumping and holding on to the lever. In the new home, she tried a couple times, then gave up. Rounded levers where cats (and cloth hangers) slip off. – Tom Apr 4 '18 at 12:19
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    The root problem here is that the internal lever fully unlocks the door. If it were designed such that there were a separate deadbolt, or even that the "twist-lock" button on the lever had to be operated independent of the lever itself, this wouldn't be a problem. (I have seen both knob- and lever- sets where neither internal nor external handle will move until the center button is moved to the unlock position) – Carl Witthoft Apr 4 '18 at 13:55
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    Note that over here (Europe/Germany) lever type with security lock are perfectly normal. The lever goes to a spring bolt and the key to a separate dead bolt. You basically choose between cassettes for ward or double cylinder/security lock (depending on trust/required security level). There's also a restroom variety where instead of a key the inside has a knob (which for safety reasons that can usually be operated by a coin or a generic tool from the outside) – cbeleites Apr 4 '18 at 20:43
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    @CarlWitthoft: with our European versions, the lever never unlocks the dead bolt. This is sometimes discussed as an issue wrt. fire safety, and there are recommendations not to lock in anyone (including yourself) with the deadbolt. – cbeleites Apr 5 '18 at 13:49
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    @cbeleites agreed -- just wanted to mention that all sorts of variations exist. In the US, one can still buy standalone double-key deadbolts (meaning without the key, you can't even unlock from the inside; intended to stop someone from breaking a window and reaching in to open the door) – Carl Witthoft Apr 5 '18 at 14:11
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The one mayor hidden disadvantage is that they need a spring to keep the lever/handle in horizontal position.

I found after moving to a 20 years old house that some of them were not horizontal, but in a falling/diagonal position. They didn't latch the door, and don't look nice, as can be seen at the begining of this video: https://www.youtube.com/watch?v=g_y2_sCDnj4

Furthermore, the spring in the lever is not standard, and finding one that suits a handle that is not manufactured anymore is not an easy task. You can get more information on that in this site.

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    I usually replace the whole assembly. most are riveted anyways so not really repair friendly. I am not much used to knobs but all I can remember turn back automatically so must have springs too – PlasmaHH Apr 4 '18 at 7:28
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    no, I mean the part that goes inside the door, That one with the spring. Replace that, put on the old handles, done. – PlasmaHH Apr 4 '18 at 9:25
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    Then they work quite differently than the european style ones. They have an assembly with a square hole that you put whatever handle you like into. Inside the assembly is a spring that keeps the hole vertical – PlasmaHH Apr 4 '18 at 9:34
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    All internal latch mechs have a return spring. If they didn't, the round-knob types wouldn't self-latch when closed any more than the lever types. – Carl Witthoft Apr 4 '18 at 13:49
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    @CarlWitthoft if you see the video, or check the link in my answer, you'll see that, beside the spring in the internal latch, levers have a spring. The spring in the internal latch is nos strong enough to keep the latch in horizontal position. – J.A.I.L. Apr 4 '18 at 13:54
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I've gotten my pocket/belt loops caught in the handle when maneuvering around doors. Have tripped myself/destroyed belt loops this way.

EXAMPLE!

enter image description here

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    0 down vote Use a HEWI 111-style door handle instead: de.wikipedia.org/wiki/HEWI - you may call it old-fashioned (it's a design from 1969, almost 50 years old), but OTOH I see you are wearing pants which were designed in 1871...so give it a thought, maybe? ;-) – Klaws Apr 6 '18 at 13:49
  • @Klaws - Those just look so stupid though. Also, you can have my 501s after you pull them off my cold dead legs. – Mazura Apr 7 '18 at 0:15
  • @Klaws Thanks for the info, did not know that style had a name. Do you know the proper name of the non HEWI door style? Just in case I'm ever swapping over and I know what to avoid. As for the old fashioned, if something is an efficient solution and is reliable, I don't see a need to change. All I know, is that I have suffered under the oppression of the NON-HEWI lever door handle and would like to point out those injustices. You're right however, I am foolishly charging HEWI'S with actions they never caused. =) – Crettig Apr 7 '18 at 22:02
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    No, I am not aware of a specific name for the non-HEWI-111-style door handles. The HEWI-111-style is nowadays available from many different manufacturers (and they obviously cannot call them "HEWI" for trademark reasons). I just have such handles on the garden shed (they tend to interfere less not only with my "1871 style" pants, but also with hoses and cables and such) and still work well with greasy/oily hands. – Klaws Apr 11 '18 at 14:59
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One disadvantage of using levers is mentioned in this article in The Economist - they may be more easily opened by bears (and velociraptors).

True, elderly and disabled people find it easier to operate doors with handles. But so do bears. In British Columbia, bears have been known to scavenge for food inside cars—whose doors have handles, knob advocates point out. Pitkin County, Colorado, in the United States, has banned door levers on buildings for this very reason. One newspaper columnist in the pro-knob camp has noted that the velociraptors in “Jurassic Park” were able to open doors by their handles.

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Lever doorknobs are now mandated by the ADA (Velociraptors with Disabilities Act) because they are much easier to operate for people with poor motor skills (or very short arms). That's why they are practically universal in commercial buildings.

Keep in mind ADA is not a "fist of God" requirement, and the primary doctrine of ADA is "readily achievable", or in new construction "unless impractical", hence the ability of a town to override it for cause of bears.

As far as snagging clothes, that is particularly a problem for firemen due to their gear, and also can snag fire hoses. As such an enhancement was mandated in public spaces:

enter image description here

And this is a pretty good idea overall. This is the only kind I would install.

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Our cats can open our doors with levers.

  • Hello, and welcome to Stack Exchange. Boy, does this make me glad we have knobs; our youngest cat is far too adventurous as it is... – Daniel Griscom Apr 5 '18 at 0:35
  • My cat can turn knobs. I bet with levers you'd get more scratches on the door. -1 @levers – Mazura Apr 5 '18 at 1:09
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As Mazura summarized, "Levers don't have as many aesthetic options as knobs."

My house has four types of door "knobs". Just looking at the hardware, you can tell how it should be opened. From most common to least common:

  • Small (non-rotating) knobs: Swing the cabinet door open.
  • Large vertical handles: Slide the pocket door sideways.
  • Modest horizontal handles: Pull the cabinet out.
  • Normal (rotating) knobs: Twist the knob, and swing the door open.

The (few) interior doors that have "normal" (rotating) knobs have glass/"crystal" knobs, because they look nice in our style of house.

I like the contrast between the knobs and the handles; it makes it easy to tell how to operate the door. Lever-style knobs would not have as much contrast (vs. handles), and are not needed/available for cabinet doors.

  • Levers don't have as many aesthetic options as knobs. +1 – Mazura Apr 5 '18 at 1:16
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My mother uses a walker and she moved into an apartment complex with some flat, but sharp, lever handles (i.e. not rounded). She kept hitting them and cutting her hand.

I replaced them with some rounded levers. But be aware of those older ones from a time when people were not concerned with sharp edges (not a problem on doorknobs).

  • Levers don't feel good, no matter what (and they're noisy). +1 – Mazura Apr 7 '18 at 0:19

protected by Niall C. Apr 6 '18 at 14:10

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