I've put some fabric on the outside of my windows using nylon thread, a stapler and some plastic suction cups. It made the day time temperature of my living room go from about 32°C to about 23°C during a heatwave in the UK. I won't need aircon in that room now. I do have an upstairs office that will keep on getting hot, so I might get an aircon there in a year or two. But I'm not desperate thanks to a tiny bit of effort.
I actually don't have a picture from outside, as it was a bit warm at the time I was taking the picture! It was meant to be a version 1 and immediately replaced with a pvc frame and a pair of hooks to install it without a step ladder in the morning, but it turned out to be pretty robust so far, and I ended up leaving it up for several days during extended heatwaves.
My next version will have two hooks using those space age double sided sticky tape strips, and the fabric will be held together by a thin pvc frame with two hooks at the top, so I can hang it from the ground without using a step ladder.
They are complimentary. Shutters reduce the amount of heat coming in. AC gets whatever heat managed to go in out.
One thing I'll never understand is not having shutters, only curtains. I live in France, almost everyone has shutters. But in other countries it's often different. I lived in Thailand for a couple of years and had only curtains, so the sun would still get past the window pane, heat the curtain, and the AC would then have take this heat outside again. This seemed massively inefficient.
I thing the best compromise is using whatever traditional, passive means of cooling we can, and then AC as needed.
Most of the time these things are governed by whatever's cheaper (in the short run).
Maybe electrical energy is massively subsidized or just cheap in general. Installing shutters can be a large up-front investment, especially when installed by somebody else. It may take many years of burning energy with an AC to earn that back.
Also maybe the home isn't even yours, but you are renting. The owner doesn't care about your energy bill.
I thought it was more of a cultural thing, or perhaps enforced by the building code ? Here in France I've never seen a house or flat without shutters. In Bangkok, when I was looking for a condo, none of them had shutters.
A cursory web search tells me shutters can influence the DPE ("diagnostic de performance énergétique".) A bad rating means you can't rent your property.
Bangkok being tropical, in summer the sun basically shines straight down (and some on the east and west walls in summer and winter), some N/S roof overhang and you’re set. In Northern Africa and southern Europe the sun is significantly lower and will shine straight through windows.
There’s definitely a cultural or historical component. In my experience shutters are extremely common, near universal, in southern Europe but much less so in northern. Which is a shame because a modern PVC roller shutter, well installed and with insulated slats, also does wonders in winter.
Since they’re using French for the rating, I’d think the shutters improve the score and that contributes to their pervasiveness.
From a quick search, older versions of the DPE ignored shutters, modern ones take them in account and their effect ranges from neutral to positive depending on details (materials, insulation, fit). It’s not entirely clear if both high seasons are considered (insulation and fit I’d think a lot less critical in summer).
>> While all of these might offer some cooling in your home, nothing beats air conditioning.
> By what measurement? […]
The measure of the air's temperature.
It does not matter if you have shutters: if the air outside is 30C then eventually the air inside will eventually get to 30C (good insulation will simply mean it takes longer).
If your outside is >30C then the only way to keep your inside <30C is to transfer the heat (which an AC does via an evaporator, refrigerant, and a condensor).
But that is exactly the point. Air conditioning doesn't keep heat out - it burns energy to change the air once the heat has gotten in. There are ways to keep it out in the first place.
FWIW, it isn't either/or - we practice keeping the shades, curtains, and windows drawn when it is hot, open when it is cool.... and we have air conditioning. Best of both worlds.
You’re simply never going to get through to someone who has internalized the idea that AC is perfect and free. They have accommodated to the luxury and will burn the planet to keep it.
We have more energy hitting the planet every second as radiation than we can possibly use. This is a non-issue for any civilised society switching to solar.
Going for an AC before you even have shutters or anything on the outside is like sending an audio file of you reading a pdf per email because the "record reply" button is right there, but figuring out where on the filesystem the PDF you have open on your screen would take 5 seconds. It's not about whether you can afford it or if the recipient can, but more what it says about you and your whole approach to this life thing.
> But that is exactly the point. Air conditioning doesn't keep heat out - it burns energy to change the air once the heat has gotten in. There are ways to keep it out in the first place.
Yes, it's best to keep the heat out. Good insulation helps, but no insulation is perfect and eventually (thanks to the second law of thermodynamics) some will get in.
Insulation is way more important than cooling capacity.
Instead of adding a 2nd condensing unit, try adding spray foam and double glazed windows. I can keep my 2400 sqft Texas home ice cold with a small 3 ton system. There are similarly sized homes right down the street from me with 5+ tons of capacity across multiple condensing units.
The biggest problem with oversized cooling systems is latent heat removal. It's much better to have a slightly undersized system running constantly through the hottest part of the day than it is to have a very powerful system running with 50% duty cycle. It's also significantly better for system life (capacitors last much longer this way). During summer months, my hvac system cycles maybe one time between the hours of 10am and 10pm.
As other commenters pointed out, the US has many areas with extreme humidity, which AC helps with. There are also desert cities (such as Phoenix or Las Vegas) where aboveground human habitation wouldn’t even be possible without AC, at least not on the scale of a city.
We are also (rightly) suspicious of people attempting to remove or restrict some personally favored appliance or tool. Often the early stages of this process appear as social media influence campaigns about how the thing in question is unnecessary or harmful. (I don’t think AC is at risk of being restricted here, but I can see why others might be overly protective.)
Many northern areas of the US still have buildings without AC, mostly older buildings.
I think it is an American thing; a principled grounded in many Americans not actually believing people like you when they claim "that isn't being suggested". Moralistic arguments that using air conditioning is harmful to society (which certainly exist in America, even if they're more common in Europe) are the rhetorical basis for actual laws regulating the use of air conditioning and trying to legally discourage its use as a matter of government policy. I have learned via European heat wave discourse that there are actually a surprising number of building regulations in various places in Europe that restrict or ban the installation and/or use of air conditioning. These kinds of laws are less common in the US, but there's definitely vocal energy conservation activists who would like to see more of them enacted here. And those are the people who the "you'll pry it from my cold dead fingers" types are opposing.
> Moralistic arguments that using air conditioning is harmful to society
Can you name one? That isn't the same argument as against all needless waste?
What I'm seeing is we can't even talk about shutter designs without talking about AC instead. Using AC may not harm society, but some people knowing about it kinda does.
The moralistic argument here in France is that the AC units heat the outside air, which worsens things for people outside, especially those who can't afford AC in their home.
Never mind that these same people would go absolutely out of their minds if you suggested tearing down and remodeling most cities, which are basically radiators at night since there's concrete everywhere.
So instead of trying to somehow mitigate the issue of "AC heating the outside air", by, for example, installing the outside units on top of the buildings, so most heat wouldn't be at street level where people walk around, many people who can't breathe in their apartments just use portable ACs which dump the heat right outside their windows. Bonus points for these being very unefficient, so now electricity consumption is even higher.
In the specific case of France, they also tend to forget that most of our electricity is essentially carbon-free.
Which is not great because it's wasteful, so you're making the same "moralistic argument". Unless your point is just that it's hypocritical, of course.
I'm not sure I'd say it's hypocritical. More like unintended consequences?
Part of the moralistic argument against planned AC rollout is electricity consumption. But not doing it is actually generating more consumption in practice.
Yeah but I don't get why it's so defensive. Sure some people are against AC for reasons, and some people are for a, for reasons. I don't see why that has to turn into an ideological battle. Discuss the issues, don't just ignore everything that's perceived as coming from the other side. Yes this is probably getting into issues of American politics. But talking about shutters doesn't have to turn into an ideological battle.
In various places in Europe, there are 2-16 weeks when AC is needed, and the reasons people don't have it include being gaslit about not 'needing' it; legislation/landlords preventing installation; not being able to afford the units or the electricity; and being stubborn and stuck in their ways particularly around wanting to preserve tradition or appearances of buildings
Don't know about "Europe", but here in France this is the main reason. Even if you live in an apartment you own, you have to fight multiple bureaucracies (city / HOA) to be allowed to install a split AC. Detached houses tend to fare better, but, even there, you should make sure you don't step over some arcane permit-requiring line.
The result is people adapt how they can, usually buying portable ACs that have terrible efficiency, so the whole "AC's are bad 'cause they consume a lot of electricity" consideration goes out the window. See how these are sold-out everywhere and people are fighting over the units when available.
Bonus points for not being able to run it at night if your windows aren't at a certain height above street level, because no one in their right mind would sleep with a street-level window open.