why are radiators always underneath windows does the heat not escape through the glass and out the window?

Answer 1

As the hot air goes up and the cold air goes down, the radiator is located where there is a better circulation, ie, even though the window is double glazed, there will always be cold air entering the division by the material itself. So the cold will push the hot air inside the room. Another explanation can be the fact that external walls can have thermal bridges and cold air can enter the room and cause heat loss. By placing the radiator on the exterior wall, the thermal bridge will still exist, but the effect of cold air entering the room, will be compensated by the heater (in environmental terms, it isn't good at all to have thermal bridges in buildings, but it is cheaper to build). Today, we can see radiators and heaters either underneath the windows or close to the maximum number of doors, as the temperature in the rooms vary and helps air circulation.

Hope I helped.

Answer 2

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RE:
why are radiators always underneath windows does the heat not escape through the glass and out the window?

Answer 3

It seems strange to put radiators under the window which is where most heat escapes from maybe its because that's where cold drafts comes so it warms the cold air so you don't notice the draft, shops do it to they have a blow heater above the door so it burns your face off when you walk through the door but all heat escapes straight away, seems bonkers to me. I have just moved into a brand new house and some of the radiators are under the window and some aren't I don't think they could make their minds up

Answer 4

I have never fitted radiators under windows unless the customer insisted it wanted it there.To say that any draughts coming from the window can help to heat better is stupid, simply because as long as a draught is coming near a radiator you will burn more gas to keep that room warm. Another thing I have never done is to fit a room thermostat in a hallway. This is because again you will use more gas because every time the front door is opened the thermostat will detect a drop in temperature and start the boiler up. A room thermostat should be fitted in a room, and usually in the living room that is why it is called a room thermostat

Answer 5

The answer to this question is your windows may have drafts and if your radiator is directly under the window it pushes the heat back into the room rather than it escaping. Also to get the max heat out of your radiators and into your rooms put some sort of reflective sheet such as insulation behind the radiator and it reflects the heat into the room rather than being absorbed into the walls hope this helps.

Answer 6

I watched carol vordermans better homes once(sad i know) and she asked that question to the contractors and they said they put radiators under the windows because the cold that comes through the windows and the heat from the radiators would compensate for each other. suppose thats right in one way because if i sit in front of the window in the cold its really bad but not when the radiator is on....

Answer 7

This is something i have noticed too. My dad runs a property firm and many of his investments he finds the radiators are under the windows.

This is a 100% sure way to lose heat. So now when he is revamping a property he always moves the radiators to the opposing wall.

Answer 8

I think its because the cold air from the window mixes with the heat from the radiator circulating the heat better.

Answer 9

They have changed it now, in new systems they put the radiators away from the windows, usually near the door if its at the otherside of the room from the window.

Answer 10

not sure why they are placed there, it's probably because no one puts any furniture there.

If you want to stop the heat from escaping, get a big sheet of cardboard and cover it in foil. Place in behind your radiators and the heat will bounce back into the room and it will reduce heat loss though the walls.