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Why do all of the microwaves that are used in our houses opening from the right side to left side? I've never seen any that do the opposite. I called LG company and asked them why and I got an answer in a week by email indicating that the first design that they did was in this structure and style.

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Because the control panel is on the right.

Microwaves have the controls on the right to favour right handed people (similar to the placement of control panels on pre 1990's televisions.)

Placing the hinge on the right would make for a very awkward design as it would be near the middle. If you wanted to stir your food and adjust the controls at the same time, you would find the door bashing into your arm. Having it on the left means it is at one end of the equipment, so when the door is open there is no obstruction for an operator moving between controls and food.

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    I would say one thing goes together with the other. The control is on the right + the door opens from the right for right handed. For left handed it would be left control + door opening from left to right. – Alvaro Nov 11 '16 at 22:08
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    From a technical point of view, this is probably the correct answer. If in doubt, go to your microwave, and imagine the door opening left to right (with controls on the right). The right side of the door would collide with the control zone, so you wouldn't be able to open the door. Thus: the hinge has to be on the most external side. After that, it's just a numbers game: 90% of people is right handed, so... controls on the right. – Devin Nov 11 '16 at 22:52
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    Do you normally use the controls without first shutting the door? My microwave actually resets the clock when I close the door so it's not even possible (unless it's just the time remaining when I opened the door). – MichaelS Nov 14 '16 at 11:10
  • "... mirroring the placement of control panels ..." does this mean control panels are on opposite side as older TV's? Shouldn't this say "... duplicating the placement of control panels ..."? – Kevin Fegan Nov 14 '16 at 16:54
  • This answer, as written, boils down to "they are laid out how they are because they have the layout they have"; if the hinge was on the right, the control panel could go on the left, problem solved. With some tweaking, it could answer the related question of why they don't have easily reversible doors, like many refrigerators do. Converting a microwave would be more like converting a car dashboard between left- and right-hand drive: it would require significant rearrangement of components. – IMSoP Nov 15 '16 at 11:48
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I would guess it is because the design fits better for right-handed people.

According to Wikipedia "Studies suggest that 88–92% of the world population is right-handed".

Microwaves doors open so that the user can insert plates, cups, etc. with the right hand (holding the door with the left hand if necessary). The user needs more precision with what is being inserted and after can close the door with the left or right hand.

EDIT: I wanted to point out that on a microwave we are managing hot elements, safety and extra precision is something to consider. Although some elements such as plates could be managed with the left hand for a right-handed person, a cup (for example) is certainly something that needs more skill specially if it contains a hot drink.

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    90% of the population are right-handed, so it makes business sense to only make right-handed microwaves, and let the lefties adapt. – Tom.Bowen89 Nov 11 '16 at 15:17
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    @Hennes Microwaves are rarely used by just one person. – David Schwartz Nov 11 '16 at 20:29
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    @user23013: most fullsize fridges have hinges that can be installed on either side, so the door opening can work with the cabinetry/room layout of the kitchen they are installed into. – whatsisname Nov 12 '16 at 5:18
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    Fridges have their internal mechanism at the top and behind the fridge area, so, being symmetrical, it's rather easy to attach hinges to both sides. Microwave ovens very typically have their control panel and attached circuitry on their side. – Gábor Nov 12 '16 at 13:01
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    @MrLister My wife is left-handed. We don't mind having an extra pair of scissors, but we don't feel like putting an extra microwave in our kitchen. – Dmitry Grigoryev Nov 14 '16 at 13:21
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I think having a microwave open from the top center (like an oven) would solve the right hand left hand argument.

Other than that argument, the only other reason I can think of - we are trained to move left to right, primarily because that is how we read and write.

If the keypad/touch console of the microwave was on the left, that would indicate that you are required to key in the time/instructions before you open the microwave and place the actual items inside.

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    A downward-opening door would cause other problems. Many microwaves sit on counter-tops, so the hinges would have to be mounted high enough to allow the door to open without being fouled by the counter. That would waste vertical space by forcing the oven to be on little legs or something. For microwaves mounted higher than counter-height, a downward-opening door would obstruct entry to the oven. – David Richerby Nov 11 '16 at 15:31
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    Next to that, plenty of microwaves (at least in my country) are placed on top of another object. With a door that opens downwards, you might think it's a good idea to use it as a temporary table to put your food on while you grab some gloves or other equipment. until the entire thing topples over, that is. – Stephan Bijzitter Nov 11 '16 at 17:45
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    My microwave is hung above the stove. With a door opening downwards, I would need to reach above the door into a microwave that I now can't see to get my food. Sounds like a good way to get burned. – Undo Nov 11 '16 at 18:00
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    There are many microwaves that have a downward opening door – Mark Nov 11 '16 at 18:51
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    @DavidRicherby A counter-example: Many (most?) toaster ovens have downward opening doors and sit on counter tops and tables. (Though they are usually smaller, and often the door can be supported when open by the handle resting on the counter.) – Lindsay Morsillo Nov 11 '16 at 20:16
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I don't thing it as a question of hinge. In my opinion it is a question of control.

As some other person has noted, the majority of old TV sets, even before remotes, have had the control knobs to the right.

It is control which commends design. Microwaves operations demand visual perception plus hand manipulation; 90% of population is right handed; so, in order to not interfere vision and hand operation, right side controls seem logical.

As a left handed person I know the feeling of misfitting in a right handed world, anyway these obstacles it are not -usually- life threatening issues :-)

PS TV sets abandoned this design when remotes became the norm.

Regards

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