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Because the gases formed by combustion are lighter than air, so creating an updraft

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15y ago
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12y ago

for the smoke of a fire place

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Q: Why are chimney's placed above the roof of a house?
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What let out smoke out of the House from the roof?

Chimneys let out the smoke out of the house from the chimney.


Are chimneys usually on the first or second floor of 2-story homes?

Chimneys are usually on the second floor, not the first, of 2-story homes. Chimneys are typically found on the roof of a house.


What do the chimneys on the March Hare's house look like in Alice's Adventure in Wonderland ears dormice or kettles?

The chimneys were shaped like ears. Here is the quotation from the book: "She had not gone much farther before she came in sight of the house of the March Hare: she thought it must be the right house, because the chimneys were shaped like ears and the roof was thatched with fur."


The air pressure acting on the roof of your house comes from?

ALL the air directly above the roof.


Where do you put a skylight in an average house?

You put it on the roof of the house making it a small window... Kind of thing With consideration to the answer above, i will elaborate slightly. You can place a skylight in any section of the house providing that there is clear access from the roof to the ceiling for the shafting/ light tunnel to take ample affect. For example you must take into consideration the ridge capping of the roof and also the valley, as the flashing must be placed in a near position to where the skylight shaft and bottom roof opening wishes to be placed, for best light into the room


Where is an attic?

Above the top floor of your house and under the roof.


How do you find the salt rocks on time tangled island?

Go to 1776 AD, and climb the red house (Graff House) to the roof. In one of the chimneys is the bag of salt rocks for 1387 AD.


What is a cupola on a house?

A cupola has several meanings. On a house, it is likely to mean a small dome shaped roof that projects above the rest of the roof.


What do you call open part of a house which is above the house?

IT is called "Roof" ============ Sounds like the attic, to me...


Where does the air pressure acting on your roof of your house come from?

the air pressure acting on the roof of your house comes from the air within a few feet of your rooftop


Why is it preferable to have tall chimneys in factories and houses?

For 3 reasons: 1/ Simple chimneys take the smoke away from a fire because the warm air inside them rises; taller chimneys have more height for this to happen so work better. This explains 10' chimneys sticking above single story houses but not really big modern industrial chimneys; it would be much cheaper to use a fan! (Early industrial chimneys were built for this reason before mechanical ventilation was economic.) 2/ Various eddies and back drafts happen around house roofs on windy days. These can blow blasts of smoke back down the chimney into a house. Having the chimney a bit above the surrounding roofs considerably reduces this. This is why chimneys tend to stick at least 3' above the roof even on tall buildings. 3/ Probably the most important reason is pollution. Certainly this is the reason for really big modern industrial chimneys. By releasing the nasty gases that come out of chimneys at great height they will have mixed with a lot of air and should be at "safe" levels by the time they get back to ground level and people breath them in. This doesn't stop pollution of the wider area or planet but it does avoid the problem of extreme air pollution at the outlet point.


What did the dog said when it looked above your house?

ruff (roof) haha you got it :)