Do these window shades work?

[Piwoslaw]

A lot of cars here have "sunshades" suck to the inside of their windows:





They are just a black net/mesh, so I wonder if they actually help to lower the vehicle's temperature, as the manufacturer claims. Yes, they reduce the amount of direct sunlight hitting the passengers, but they do not reflect sunlight back out of the car (unless invisible heat/infrared is reflected). My guess is that they absorb direct sunlight and emit it as heat.

What do you think?

I've seen a few cars with white versions of these, and I'm willing to believe that these work, but I can't find any which aren't black.

[rbrowning]

White will reflect more light, both ways. It will be harder to see through the white than the black.

I usually see these used for a child,s seat where they are not tall enough to get their face up into the shadow of the roof. I agree that the black isn't going to reduce interior heat build up much, if at all.

[euromodder]

The moment the heat is through the glass and gets transfered to the air inside the car, most of the damage is done.

They'll help a little bit - even black reflects heat - and will keep away direct sunlight, so it feels a bit more comfortable.

[mcrews]

The Infiniti has these built into the window sills in the back doors.
I still have the max legal tint applied to the window AND have a static (removable ) film on the window.

[Old Tele man]

...I've used them. They work OK at keeping "direct" sunlight off of you and the passenger(s), but do NOT reduce the incoming solar-induced thermal load (heat), so A/C works just as long & hard as before...BUT, since you (and passenger(s)) aren't receiving direct sunlight, there *IS* a better 'comfort zone' than without them.

[mcmancuso]

I've had some that are white on the outside and black on the inside, better visibility and heat reflecting than solid either color, don't know where they came from, they're pretty old.

[jtbo]

There is also shiny aluminium? shades that are meant to put on windshield while car is parked. I think that it should be installed outside of the window to have proper effect as such would just warm air between window and shade if put inside. Ok, surely it does work inside too, but I think effect is not so great with it inside.

Best solution, install Kammback and park car so that sun does shine on rear part of car

[jtbo]

Originally Posted by mcmancuso

I've had some that are white on the outside and black on the inside, better visibility and heat reflecting than solid either color, don't know where they came from, they're pretty old.

I think that it would not be difficult to spray paint them?

[mcmancuso]

Louvers, yeah...

[Piwoslaw]

Originally Posted by mcmancuso

I've had some that are white on the outside and black on the inside, better visibility and heat reflecting than solid either color, don't know where they came from, they're pretty old.

That's exactly what I'd be willing to get. Maybe I'll just spraypaint them as jtbo suggested.

As for the shiny windshield block - I already have one, but it doesn't reduce thermal gain while driving, since it is folded and stowed then

Mcrews: Shades that hide inside the door liner is my ultimate goal