deleted by creator

Plant trees around your house. Shadow and natural cooling because they tend to evaporate water. Use white outer surfaces to reflect sunlight for additional benefit.

As @[email protected] said, you’re building a greenhouse. Nearly all sunlight that gets through the glass will contribute to heating up what’s inside, and none of the heat will be able to get out. The major reason for the greenhouse effect is that there’s no way for hot air to escape.

Under an open sky, the sun heats up the ground, the ground heats up the air, and the hot air gets blown away by wind and rises through convection, being replaced by colder air from surrounding areas. An equilibrium is reached when the air takes away the same amount of heat per second as the sunlight brings in. But in a greenhouse: the sun heats up the ground, the ground heats up the air, and the air is trapped. It has nowhere to go, so everything continues to get hotter and hotter. The air heats up the glass walls and roof of the greenhouse (the sun helps with that too), until the walls are hot enough to expel all the heat that’s brought in by the sun, in the same way as the non-greenhouse ground would. The end result is that the inside of the greenhouse is way hotter than the outside.

Note that this has very little to do with what chemicals the air is made up of. Even if the gas inside the greenhouse has a “sun blocking effect”, it would still have to absorb all that energy from the sun, and that heat would still be inside the greenhouse.

See other answers for better alternatives :)

My grandma used to water the garden around the house and spray water over the roof on hot days. Try that first.

Laws of thermodynamics. You can’t totally trap heat. All you can do is encourage it to spread a bit faster in one spot compared to all the other places it’s spreading.

so… you’re building a miniature greenhouse.

The problem is insolation. technically, that’s just light that hits the earths surface… but in this context, it’s light that passes through your glass chamber. it then hits whatever is inside and turns into heat, causing things to heat up.

Like a car in full sun. This would likely increase your thermal gains and not decrease them. (because for the gas mix or whatever inside the layer to have any effect… light already needs to be entering the system.)

Alternatively several things can be done to reduce solar heating. The first is painting your building a white (or very light color- sky blue, sandy tan, etc. titanium white is best… but… really who wants a stark white house like that?) Another is planting things. Trees in the yard will transpire- they release water into the atmosphere as part of photosynthesis which is why tree-shade feels cooler than blocked-sunlight-shade.

Then there’s the living-roof set up. Basically you have some type of water barrier, then you have a large grow box (think of it like having a raised-bed garden tall enough and large enough to live under,) In which you plant… stuff. I recomend talking with whatever DNR-type you have (most state DNR’s in the US, at least, have ‘native seed mixes’ you can buy by. my state has a wildflower mix that’s… not entirely “weeds”…heh.)

Along that line of living roofs; you might be inclined to find some type of leafy climbing vine- Stay away from kudzu, it’s horribly invasive, and I’d suggest staying away from non-native ivies as well. (though, those may be less offensive.) These plants will also transpire, and have the added benefit of absorbing and using the light as something other than heat.

If you don’t like the idea of your house covered in vines… you could also go with a living wall There’s lots of options there… some of them easier and more maintenance free than others. (you can also grow vegetables or whatever here, if you should like.)(you can do them indoors, too, for a natural air-purifier… anything leafy works.)