Cooling tips

[aveatry]

No, I'm not saying anything of the sort.

That what it sounds like - we are telling you that outside heat will work its way into the house through insulation and you are saying it wont

 

[motorbiking]

Ideally, you would also avoid any human occupants.

Don't underestimate the source of heat inside a building and the one way effect of solar gain.

Humans: Each human 100-200 watts p/h
Infrastructure: A laptop, a monitor etc. 100-150 each, same for a TV. p/h
Solar gain on a window: Sunlight entering a space through a window increases the temperature of that space. This happens because the shortwave solar radiation passes through the glass and is then absorbed by objects inside, which then re-emit it as longer-wavelength infrared radiation that is trapped by the glass, leading to a rise in temperature.

Then you have the outside temperature which impacts a building's ability to lose heat.

When you calculate the heating requirement for a space based on the U-value you typically assume an outside temperature of zero and a target inside temp of 20-21.

I would expect the avg. builder to know about this. But it seems to be the domain of HVAC engineers. I guess the builder just does what they are told.

With a U value of .19 and a large south facing modern window, you could easily find a room gains heat that it cannot lose.

 

[motorbiking]

External shutters is the traditional way in many hot countries. It completely avoids the tremendous solar gain through glass. Along with white exteriors and white roofs. External blinds are becoming more popular here. A few years ago they simply didn't seem to exist. But many are now putting in massive patio doors as a feature and realising that the solar gain is a big problem. But external blinds seem to be ridiculously expensive. When I had a quick Google, they seemed to start at £2K+ for a patio door.

I wonder what you could buy for 2k that would keep your whole house cool in the summer and warm in the winter?

 

[pete01]

That what it sounds like - we are telling you that outside heat will work its way into the house through insulation and you are saying it wont

He's a major troll he will go against anything, it's all very strange to be honest.

 

[noseall]

I genuinely thought that you would need knowledge of this subject in your day to day work. But it seems not.

If you think you have put together an argument, for reducing or omitting insulation in an attempt to make regular houses cooler on a summers day, you have failed
Badly.

 

[noseall]

That what it sounds like - we are telling you that outside heat will work its way into the house through insulation and you are saying it wont

No it wont

 

[Harry Bloomfield]

Poor conductors of heat don't cease to be poor conductors of heat after breakfast, lol.

Another stupid, nonsensical response, which ignores basic physics. Insulation will keep out heat, or cold for a while, but it can only delay either. In the long run, the insulated space, will need either heat, or cold input, to maintain a stable temperature.

 

[Harry Bloomfield]

No, I'm not saying anything of the sort.

Well, that is exactly what you are posting, repeatedly. If that is not what you mean, then explain yourself, in English if you please.

 

[motorbiking]

If you think you have put together an argument, for reducing or omitting insulation in an attempt to make regular houses cooler on a summers day, you have failed
Badly.

No I've shown that you don't seem to have any knowledge of how a highly insulated building with windows, can heat up and not cool down due to being well insulated.

No, a well insulated home will NOT inevitably heat up, during the day to day cycles of warm days and cooler nights. Not inevitable or even close.

I think we are all clear that this is nonsense. I was genuinely surprised that you know so little about this subject.

 

[gas112]

Perhaps when Noseall business claims to have all that experience in the building game its the other guy who has 95% of it

 

[noseall]

Another stupid, nonsensical response, which ignores basic physics. Insulation will keep out heat, or cold for a while, but it can only delay either. In the long run, the insulated space, will need either heat, or cold input, to maintain a stable temperature.

Nonsense.
You are assuming the sun beats down on a house constantly and in the same position.
A well insulated house will not wick heat through the masonry.

 

[denso13]

That what it sounds like - we are telling you that outside heat will work its way into the house through insulation and you are saying it wont

Eventually yes, in controlled circumstances, but in a typical day/night heating/cooling cycle it won't in practice.

 

[aveatry]

Nonsense.
You are assuming the sun beats down on a house constantly and in the same position.
A well insulated house will not wick heat through the masonry.

The masonry retains the heat from the time the sun was on it then when it is persistently hot and sunny the heat builds up in the masonry every time the sun is on it.

 

[Brigadier]

I was genuinely surprised that you know so little about this subject.

I'm genuinely surprised you think the sun stays in one place in the sky.

And that windows don't open.

And that rooms don't have doors (that, most likely, open into cooler spaces).

 

[Harry Bloomfield]

Nonsense.
You are assuming the sun beats down on a house constantly and in the same position.
A well insulated house will not wick heat through the masonry.

Eventually, it will, no insulation is perfect, even in space. Does the coffee, in your thermos, stay hot forever? Heat and cold, will eventually pass through even the very best insulation. Insulation just slows, and delays the process, it doesn't stop it.