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My kitchen gets too hot during the summer while I am cooking. I have exhaust fans installed in the kitchen, but it's not really helping. I have four questions:

  1. Is there any other way I can reduce the kitchen temperature?

  2. Does the kitchen chimney help reduce kitchen temperature? I read one ducting kitchen chimney is as powerful as 15 exhaust fans. But I also read that kitchen chimney mainly help to fight with odors, oil, etc, but not temperature. My friend said using kitchen chimney will definitely give some relief. I really want some expert/experienced advice, will it really help to reduce kitchen temperature by at least some degrees?

  3. Are there other appliances like air purifier, humidity controller that can solve this issue?

  4. Should I stop trying to reduce kitchen temperature, as it's essential for cooking? (But, I really want food getting cooked, not myself :'( )

  • Could you describe what you mean by a kitchen chimney? – Robin Betts Apr 22 '18 at 18:39
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    Advantages of high temperature in a kitchen: Your coconut oil will be liquid, your yeast dough will rise and your pickles ferment faster, you will actually use less energy to cook. Disadvantages: Everything stored will spoil/degrade/stale faster, your fridge will use more energy, and pastry will be a pain to work with because the fats melt. – rackandboneman Apr 22 '18 at 18:55
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    Leave the fridge door open. Just kidding, ill show myself out. Natural ventilation would be the best. Are there windows on opposite sides of the house you can open to get cross ventilation? – Duarte Farrajota Ramos Apr 22 '18 at 19:20
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    @DuarteFarrajotaRamos Agreed.. a through-draught (preferably in the right direction) is the best way.. perhaps a 'kitchen chimney' would provide this. – Robin Betts Apr 22 '18 at 19:24
  • Not an answer but, a dehumidifier may help. It probably won't lower the temperature in your space but it should make it more comfortable by lowering the humidity. – Cindy Apr 22 '18 at 22:47
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Sucking hot air out of the kitchen using the hood ("chimney") will cool the room, though possibly not by much on a hot day. A nice big open window to allow fresh air in will maximise this effect. Even on a hot day, the hood will cause a through draught, and the lower humidity, slightly cooler air blowing over you as you cook will be much more comfortable.

In very rare cases where the outside temperature is above the inside temperature (traditional buildings that are designed to cool at night and heat as slowly as possible during the day) there's little you can do. Such buildings aren't really designed for use with air conditioning (and they often come from a tradition involving outdoor cooking)

Some other things you can do that make at least as much difference:

  • Cover dishes when cooking and turn the heat down (yes, even if it's not traditional). This is especially useful when boiling/simmering as the steam contributes to the discomfort.
  • Some dishes can be brought up to boiling point then insulated to continue cooking.
  • In a heatwave I've been known to get a long extension lead and an electric hotplate and cook outside (probably not an option in an apartment unles you have a balcony).
  • The outside temperature is almost never above the inside temperature. My home's layout is something like this. I can install exhaust chimney to take out hotter air. Now I was guessing if I can keep something like these air circulators(which have super ratings on amazon) or smaller versions in the middle passage (where all doors open) facing kitchen to create input air current to replace hotter air. Does it makes sense? – Mahesha999 Apr 25 '18 at 6:32
  • The extractor will create a through draught if the window is open but a fan pushing in the same direction will help, and may make the kitchen more comfortable. You need to be sure that the hood can actually extract to the outside world (not a recirculating one, they're rubbish) – Chris H Apr 25 '18 at 7:12
  • yup I said "ducting kitchen chimney" in original question. The recirculating ones are ductless. – Mahesha999 Apr 25 '18 at 7:16
  • From a semantic point of view, ducting doesn't days anything about where the other end of the duct is, so I wanted to reinforce the point – Chris H Apr 25 '18 at 7:35
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Thanks for your clarification of 'kitchen chimney'. A lot of the readers of this SE come from places where it would be called an 'extractor hood'.

In my experience, an domestic extractor hood which draws air to the exterior of the building can really help remove steam, and oily vapours / occasional smoke from searing, grilling and frying. Their effect can be quite local to the hob; depending on how your kitchen is arranged, they can have surprisingly little effect on say. a separate oven. They can really help to keep a kitchen clean, reducing oily deposits around the room.

But I think they would have to move very large amounts of air (more like an industrial extractor) to have a significant impact on temperature in the room. Also, before choosing one, carefully imagine the steps involved in cleaning and maintenance, so you can be sure they suit what's available to you.

The best way to cool your kitchen would be to create a through draught, moving large amounts of air from a cooler place, through the kitchen, and out again. You will have noticed that sometimes, to cool a room, it's not enough to open one window in it - you must also open another window on the other side of the building. You have exhaust fans fitted, you say there is only one window - make sure there is somewhere to draw the air from without resistance, maybe by opening/venting doors or windows elsewhere.

In the days before air conditioning, traditional buildings in hot places took advantage of these natural phenomena much better than they do now, making use of light and shade, water-cooled central spaces, and chimneys, to create flows of cool air. If there's any way you can emulate that, I would try it before resorting to A/C.

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Cooking sous vide and using induction burners both reduce kitchen heat.

  • a pressure cooker is also very good at minimising waste heat – Agos Apr 26 '18 at 14:57
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The term I am more familiar with is exhaust hood (there are also recirculating hoods). Sometimes they use the terms ducted and ductless.

A powerful exhaust hood is about 1000 CFM. A small kitchen 10x8x8 = 640. So it would turn over the air in less than 1 minute. That is enough to pull off some heat. Is it more than a couple degrees would be hard to say.

Humidity controller should drop the humidity but it produces heat.

Your refrigerator produces heat. Be organized and pull all you need in one sweep.

Let dishes cool outdoors (if you need them to cool).

An outdoor BBQ keeps the heat out of the kitchen.

Cook with lids when possible. Turn off the heat and let it continue cooking as it cools.

High end highly conductive cookware will have less lost heat.

A crock pot probably uses about the same amount of heat but if it is spread over 4+ hours it should have less effect on temperature.

  • The schematic of my home looks something like this. (I know it might be almost impossible to judge anything looking at that image.) Only bedroom and hall windows open at road side and get incoming air current. other windows open inside apartment. How efficient exhaust hood will be in reducing temperature, if there is very little air incoming to the kitchen? – Mahesha999 Apr 23 '18 at 19:23
  • A window is a lot more than no windows. – paparazzo Apr 23 '18 at 19:30
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The only way you are going to reduce the ambient temperature in your kitchen during the summer is with air conditioning. Yes, I know it is not the answer you wanted to read, but it is the reality.

I've no idea what you are talking about with a 'kitchen chimneny', but if it is some sort of exhaust, you have got to makeup the air it sucks out of the kitchen from someplace. Is that air in that 'someplace' hot to or even hotter?

Any appliance you think up other than an air conditioner is going to consume energy that euauals more heat.

  • I think "kitchen chimney" means an extractor hood. There would be no problem blowing the air someplace hotter - however, if you are sucking air out of a room, the temperature of the air filling that vacuum determines room temperature... – rackandboneman Apr 22 '18 at 18:50
  • Air conditioning like you said or a proper ventilation for air to cycle through the room. – Jade So Apr 22 '18 at 19:00
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    @rackandboneman I was talking about kitchen chimney. Some more images of kitchen chimneys. You must be aware of it right? In fact I was to create separate question asking whether such kitchen chimney indeed help reduce kitchen temperature, or its just capable of reducing the smoke and odors. – Mahesha999 Apr 23 '18 at 5:57
  • @JadeSo air conditioner? – Mahesha999 Apr 23 '18 at 6:01
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    A rare downvote from me as you're flat out wrong. Replacing heated air with cooler air will always reduce the room temperature. The only situatiojn in which you could be right is if the outside was hotter than inside, and without an air conditioner that's highly unlikely in a kitchen – Chris H Apr 23 '18 at 12:44

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