|
In Montreal area, we currently have -30 (wind chill -41). But cheer up: in Resolute is "only" -34 so it cannot get much worse 
Mircea
|
|
|
|
|
ahhh 'nother Montréaler...
CI/CD = Continuous Impediment/Continuous Despair
|
|
|
|
|
Move to Florida. You will be welcome here! As thousands of your fellow New Yorkers can testify. 
Get me coffee and no one gets hurt!
modified 4-Feb-23 9:04am.
|
|
|
|
|
In New Orleans, when it gets down to 42:F We all freeze to Death. 
|
|
|
|
|
A long time ago, when I live in Los Angeles, CA, 45 was considered cold, too. Little did I know...
|
|
|
|
|
Same in Montréal, 3 days at around -25c
I wanted to go for a walk on the mountain, but I can't find my long johns; just too cold otherwise.
But from tomorrow, we'll have an above 0c weather for at least a week.
CI/CD = Continuous Impediment/Continuous Despair
|
|
|
|
|
Where I grew up and went to school, we were kicked out of the buildings for 10 / 20 minutes between classes, to breathe fresh air and have some physical activity - but if temperature went below -20C, we were allowed to stay in the corridors. Lots of us went outdoors anyway; we didn't consider it to be 'real winter' at much less cold than that.
There is an important side to it: The winter time air was almost as dry as a desert. And 'wind' was some strange, unknown phenomenon that we could read about in the newspapers, something they had in places remote from ours 
Bottom line: The temperature alone doesn't tell very much. Humidity and wind are essential. That's why we refer to 'wind chill factor'. But it is relevant only to the human experience of the cold!
One thing that lots of people are not aware of: The 'wind chill' has to do with evaporation from your skin when you are outdoors. That cools the skin down, and may give you frost bites. But, your house doesn't sweat. It doesn't loose heat due to evaporation from its outer surfaces. So your heating requirements depends on the air temperature, but not on the wind chill factor!
If you have an extremely poorly insulated house, you might have a very slight effect of the wind: In absolute windstill, heat loss might heat the surrounding air to lay as a slightly warmed blanket around your house. But even the slightest puff of wind will blow it away; the effect is so small it isn't worth considering. If you insist that wind cools down your house: Yes, that may be true, if you have ventilation that will let more hot air out of the house when it is blowing. Or for that sake, any hot air leakage at all, even if is was never intended to be 'ventilation', where the wind can suck hot air out of the building.
For at least 40-50 years, Norwegian building standards have required walls to be absolutely air tight, inpenetrable by wind. For not quite as long, passive ventilation through vents in the walls have been banned: All air replacement should be centralized, so that the heat energy of any hot air leaving the building can be transferred to the fresh, cold air being sucked in. I'd think that such requirements sound crazy in Florida
|
|
|
|
|
Allow me a mini poll:
How are building regulations in your country with regard to minimum insulation?
Are you allowed to put up a new home from walls with no insulation whatsoever? Or are there minimum requirements to what is commonly called the 'U value' (earlier, it was called the 'k-value') of outer walls?
The U value, in its metric version, is given in Watt / SquareMeter*TemperatureDifference. If your living room has an outer wall of 2.5 * 6 meters, i.e. 15 sqm, your indoor temperature is 20C, the outdoor temperature is -20C, and the wall has a U-value of 0.1, then your heat loss is 0.1 * 15 sqm * 40 K = 60 W. To keep the temperature unchanged, you need a living room heater of 60 W under these conditions.
I believe that Norwegian requirements are rather extreme, with U=0.13 for the roof, 0.10 for floors, 0.18 for walls and 0.8 for windows. Is your country/state anywhere close to such requirements?
For U values in 'English' units, there will be a simple multiplication factor to metric. I don't know which units are used - probably square foot and temperature in delta F. I assume that those who can provide English U-values can tell about the units!
|
|
|
|
|
On the left side of the pond we use the R-value[^] which is 1/U (just to be different). In southern Quebec minimum values are R-41 for the roof space, R-24.5 for above-ground walls and R-17 for foundation walls. (see this)[^] That would make something like U=0.3 for roof, 0.4 for walls and 0.6 for foundation walls.
Edit: R values given are in imperial units. They have to be multiplied by 10 for metric units.
Mircea
modified 4-Feb-23 14:34pm.
|
|
|
|
|
Thanx Mirea for the clarification and conversions.
"A little time, a little trouble, your better day"
Badfinger
|
|
|
|
|
If U = 1/R, you made 10x math errors.
1/41 = .024
1/24.5 = .041
1/17 = .058
Did you ever see history portrayed as an old man with a wise brow and pulseless heart, weighing all things in the balance of reason?
Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful?
--Zachris Topelius
|
|
|
|
|
No, I was accounting for imperial/metric units. The U values are given in [W/m2*K] while the R values are in [K*ft2/W]. When given in metric units, R values are usually called RSI (like R in SI).
Given that 1sq m ≈ 10sq ft, I multiplied the 1/R values by 10.
Mircea
|
|
|
|
|
The building codes are mostly locally drawn up and enforced. The US is so big that required R values for construction can vary greatly. In the southern US the highest recommended R values are the lowest recommended values for the northern regions.
A friend moved from Minnesota to Florida where he built a house. He mentioned how much less insulation was put in the new Florida house than was in his old place in Minnesota. He said it was a cost savings measure. Plus in Florida they are only cooling the house (or on rare occasions heating it) by 20 or so degrees F (~10C). Whereas in Minnesota you're heating the house 50-60 degrees F or more during the winter. This was in the 90s. Times have changed so I would expect that now his story might be different.
R value is the thickness of the insulation divided by the thermal conductivity of the material. (That's a simplistic definition. It's actually a fairly complex calculation.) It's basically a measure of the resistance to heat transfer. The typical recommended R values (now) are:
Ceilings/attics are R30-50 in the south, R50-60 in the north.
Walls are ~R14 everywhere.
Floors are R13-19 in the south, R25-30 in the north.
The central US is somewhat in between these numbers, but tend to go as high as in the north.
The current recommendations/requirements are all fairly new now that climate change is starting to cause regulation and the cost of heating and cooling are going up. There are a lot of older houses that don't even come close to current recommendations. In a lot of places, especially rural, it'll still come down to est. cost to heat vs cost of insulating rather than some regulation. Northern MN has lots of trees, you see a lot of wood burning. Southern MN has lots of corn you see more corn pellet burners. These are typically used to offset the cost of oil or gas heating and are easier and cheaper to add than insulation on older construction.
The house I grew up in (northern Minnesota) was a drafty cold house in the winter - built in the 50s. You could feel a breeze come in some outlets. But, heating was cheap back then. You just upped the thermostat and/or wore a sweater. You also got used to it. My brother now lives in the old place and keeps the thermostat set to 67 and you dress up if it feels cold. He typically wears shorts and a t-shirt around the house - as I said, you get used to it.
|
|
|
|
|
the core part of my home is very old almost 100 years old. I have new additions to it though that are up to code for this area of new york. however, the older parts of the house need to really have the insulation upgraded to new code. those parts of the house are always the coldest.
|
|
|
|
|
We are expecting the coldest days of the winter in the next three days...
It will be 2-7 C° (night-day)...
"Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid." ― Albert Einstein
|
|
|
|
|
No thanks. I like looking at pictures of snow, but wouldn't want to live in it. 
We have the opposite here, it hasn't dropped below 25C overnight for about week now, with daytime getting above 34C.
Of course the air-con broke before xmas. <sign> 4 more days until the new one is installed.
// TODO: Insert something here Top ten reasons why I'm lazy
1.
|
|
|
|
|
While in the service, I spent one winter in Orlando FL, the next winter in Fairbanks AK. If someone offers you the choice, I recommend Orlando. Worst was -50 degrees F, working outside.
>64
Some days the dragon wins. Suck it up.
|
|
|
|
|
Funny situation:
⬜⬜🟩⬜⬜
🟨🟩⬜🟨🟩
5 letters in two tries, two letters still need to be swapped...
Luc Pattyn [My Articles]
The Windows 11 "taskbar" is a disgrace. It should be at the left of the screen, with real icons, with text, with progress, etc.
So I declined the "upgrade" to Abomination 11.
I can only hope they will continue to honor my choice...
|
|
|
|
|
Wordle 595 3/6
⬛🟨⬛🟨⬛
⬛🟨🟩⬛🟩
🟩🟩🟩🟩🟩
|
|
|
|
|
Wordle 595 4/6
⬜⬜🟨⬜🟩
🟨🟩⬜⬜🟩
🟩🟩⬜🟩🟩
🟩🟩🟩🟩🟩
"A little time, a little trouble, your better day"
Badfinger
|
|
|
|
|
Wordle 595 5/6
⬜⬜🟨⬜🟨
⬜🟨🟨🟩⬜
🟨🟨⬜🟩⬜
🟩🟩🟨🟩🟨
🟩🟩🟩🟩🟩
|
|
|
|
|
Wordle 595 4/6
⬛⬛⬛🟨⬛
⬛🟩⬛🟨🟩
🟩🟩⬛🟩🟩
🟩🟩🟩🟩🟩
|
|
|
|
|
Wordle 595 4/6*
⬜⬜⬜⬜⬜
🟩🟩🟨🟨⬜
🟩🟩🟨🟩🟨
🟩🟩🟩🟩🟩
Unlucky guess with number 3! 
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
|
|
|
|
|
I'd post my result but it looks amazingly like yours. 
My eyes rolled so far back at guess 3 that they ended up facing forward.
|
|
|
|
|
It did make guess number four pretty easy though ...
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
modified 4-Feb-23 11:28am.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
