Cooling tips

[Harry Bloomfield]

Exceptionally hot weather, demands exceptional measures, to remain comfortable. Tonight, and the next few day it is suggested it will remain hot a sticky, and uncomfortable for sleeping. So tonight I will be getting, my large portable fan out, to put on our bedroom window ledge, drawing the cooler air directly in, from outdoors.

 

[aveatry]

I have a portable air-conditioning unit for the bedroom works well but is too noisy to sleep with so I pre cool the room right down and turn it off just as I drift off to sleep and the room stays cool enough after.

 

[Notch7]

But it isn’t.

All the time there is a temperature difference heat will move from one to the other according to the thermal resistance of the wall.

whilst that is scientifically correct, the heat transfer through an insulated cavity wall wont be that large even after 12 hours of sunshine..........it is not the mechanism through which UK houses get too hot

the more important factor is thermal mass:

a stone wall 600mm thick has a u value of around 1.2

a cavity wall to current building regs has a 0.18

the stone wall has a much lower u value but if you go into a building with thick stone walls, it will be cool inside -try going into a church or similar in the Med


modern houses have almost no thermal mass internally so it doesnt take much for houses to get warm quickly and once they are warm, theres no way to lower the temperature. How do they get warm: mostly from solar gain through windows and ventilation.

 

[motorbiking]

whilst that is scientifically correct, the heat transfer through an insulated cavity wall wont be that large even after 12 hours of sunshine..........it is not the mechanism through which UK houses get too hot

the more important factor is thermal mass:

a stone wall 600mm thick has a u value of around 1.2

a cavity wall to current building regs has a 0.18

the stone wall has a much lower u value but if you go into a building with thick stone walls, it will be cool inside -try going into a church or similar in the Med

Because it has dark windows and a tall roof as well as a lot of stone.

modern houses have almost no thermal mass internally so it doesnt take much for houses to get warm quickly and once they are warm, theres no way to lower the temperature. How do they get warm: mostly from solar gain through windows and ventilation.

see post: https://www.diynot.com/diy/threads/cooling-tips.647150/post-6033960

 

[Munroast]

whilst that is scientifically correct, the heat transfer through an insulated cavity wall wont be that large even after 12 hours of sunshine..........it is not the mechanism through which UK houses get too hot

the more important factor is thermal mass:

a stone wall 600mm thick has a u value of around 1.2

a cavity wall to current building regs has a 0.18

the stone wall has a much lower u value but if you go into a building with thick stone walls, it will be cool inside -try going into a church or similar in the Med


modern houses have almost no thermal mass internally so it doesnt take much for houses to get warm quickly and once they are warm, theres no way to lower the temperature. How do they get warm: mostly from solar gain through windows and ventilation.

thats about the sum of it - stop the sun shining through the windows (white sheet outside) and when it is warmer outside keep all doors and windows shut - during the night if it is colder outside, let the cold air in

for a cheap cooling indoors - you could hang some wet blankets up to dry, this will cause some cooling of the air as the water absorbs latent heat to evaporate - it may knock a degree or two off ?

 

[Notch7]

Because it has dark windows and a tall roof as well as a lot of stone.

see post: https://www.diynot.com/diy/threads/cooling-tips.647150/post-6033960

deflection

youve not addressed the point

you claimed that heat is transferred through walls.........which it is but it doesnt affect on the internal temperature as the heat transfer is too slow to have a material affect.

the real problem is that heat gets in rapidly by solar gain on windows and via ventilation and theres no cold internal thermal mass to keep the house cool, most UK houses have no means to cool down only heat up

 

[MNW67]

modern houses have almost no thermal mass internally so it doesnt take much for houses to get warm quickly and once they are warm, theres no way to lower the temperature.

They should also cool more quickly once you let the cool air in at night. The main point about low thermal mass is that you get much bigger fluctuations.

 

[diy_fun_uk]

I've hired two very attractive migrant ladies to live-in for the warmer months. If I ring my bell, one of them will chuck a bucket of cold water over me to cool me down.

 

[motorbiking]

deflection

reflection would be better

youve not addressed the point

you claimed that heat is transferred through walls.........which it is but it doesnt affect on the internal temperature as the heat transfer is too slow to have a material affect.

I actually stated Solar gain and the heat output of items inside the home were the reason a highly insulated home can over heat

the real problem is that heat gets in rapidly by solar gain on windows and via ventilation and theres no cold internal thermal mass to keep the house cool, most UK houses have no means to cool down only heat up

Yes I explained that too. When I said the heat energy penetrated the Glass, heated objects inside and then couldn't escape because the wavelength had changed.

 

[motorbiking]

I've hired two very attractive migrant ladies to live-in for the warmer months. If I ring my bell, one of them will chuck a bucket of cold water over me to cool me down.

How much do you have to pay them to "ring your bell"

 

[diy_fun_uk]

How much do you have to pay them to "ring your bell"

Nowt. They get a roof over their heads and three meals a day.

 

[motorbiking]

Nowt. They get a roof over their heads and three meals a day.

I have this image:

 

[diy_fun_uk]

I have this image:

You 100% won't believe me, but I was going to post a clip of that!!!

 

[Brigadier]

https://www.topgear.com/car-news/satire/overheating-triumph-stag-blamed-uk-heatwave-claim-meteorologists

 

[Munroast]

I had this vision