@liza_ebbecke: Some corners blew off, but now they’re secured again! Indoor temp is so much lower with the aluminum! 🔥 #heatwave #americaningermany #aircondition #europeansummer

SLT_ViolatedELF_530 :

Okay folks, engineering geologist and hydrologist here. Let's use the laws of thermodynamics to determine whether aluminum foil belongs on the inside or outside of a window to keep your home cooler. The First Law of Thermodynamics states that energy is conserved. Solar radiation doesn't simply disappear, it is either reflected, transmitted, or absorbed. To keep a home cool, the goal is to reflect as much incoming solar radiation as possible before it enters the building envelope. The Second Law of Thermodynamics tells us that heat naturally flows from warmer areas to cooler ones. Once sunlight heats the glass, foil, blinds, or indoor air, that heat will spread throughout the home as it seeks thermal equilibrium. So let's compare the two options. If the foil is placed inside the window, sunlight must first pass through the glass before reaching the foil. While some of that energy is reflected back outward, some has already been absorbed by the glass and the air between the glass and the foil. At that point, a portion of the heat has already entered the building envelope and can be transferred indoors. If the foil is placed outside the window, most of the incoming solar radiation is reflected before it ever reaches the glass. Because the glass absorbs far less energy, significantly less heat enters the building, resulting in a cooler interior. From a thermodynamics standpoint, the answer is clear: if your goal is to keep your home as cool as possible, the foil belongs on the outside of the window. Thank you very much for comming to my TedTalk, have a great day, and stay cool!

Veronica 💜 :

Learn how to make a swamp cooler.

DianeBeach :

Black out curtains??

MiriClip's :

OH HONEY... THEY GO ON THE INSIDE OF THE WINDOWS.

Joe The Flooring Guy🇺🇸 :

She's doing it wrong. You are supposed to put the foil directly on the sun itself

Artistsoul2 :

Add just a drop of soap. Helps it stick better. Look up swamp cooler. Easy if you can get to ice.

Miranda :

boys and girls....tin foil helps keep a house cool by reflecting sunlight away from the house. it should be placed on the OUTSIDE of the windows if possible ....for best reflective results.

Lins :

After reading the comments, I’ve concluded the foil actually goes on the inside of the windows. And also actually goes on the outside of the windows. Hope that helps :)

ogmomofbjjn :

You’re actually supposed to apply it outside. She did it right.

KDPhotography ✞ :

Girl put them on the inside!

Elise Dé :

Basic physics left the chat after seeing those comments. You're doing it right girl

osorarnc8kj :

Foil reflects heat. Putting them on the inside causes the glass to heat up more than it normally would and risks cracking. Outside is correct

@ :

I actually can’t with everyone saying to put it on the inside I feel like no one uses logic

Carolina Carmona Mar :

I put them both outside and inside. Outside def works better; it keeps the heat outside. The foil inside is hot and can make the interior warmer.

a a r o n. :

please please don't listen to people saying it goes inside, that could really heat up your windows and get real bad... it goes outside indeed !

rizzyliz14733 :

schBree :

a drop of baby soap and water helps best

David CottonFarmer 🚜 :

Outside placement gives you the best cooling effect and lowest risk to your windows. Inside still helps a little, but it’s clearly inferior and riskier.

user8823354365951 :

I thought if they go on the inside it gets hot and cracks your window… what r these comments

SabrinaMunich :

the amount of people saying it goes inside...😳

Mike1971❌ :

As a property manager you don’t put it on the inside unless you want to risk the excess heat cracking your windows

thequietpart_outloud 🆘🇺🇸🆘 :

I think it’s peeling off because you put it outside when the sun has basically baking it. If you put it inside, it won’t peel up like that.

HanSolo :

For all the Americans and Canadians they use triple pane glass in alot of Europe it will crack if you put the foil on the inside. You can do that in NA bevause we use double pane.

bethany :

crazy how many people think it goes on the inside 😅