Super Heat Stopper - ShiNy Windows // - Ford Transit USA Forum
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post #1 of 32 (permalink) Old 07-14-2019, 09:08:PM Thread Starter
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Super Heat Stopper - ShiNy Windows //

Being in Hot Texas made me start thinking about what I could do to reduce
the heat in my van -

The Obvious place to start is the Windshield -

After thinking about it for a while I decided to put aluminized Mylar
sheet on the OUTSIDE of the Windshield -
Stopping the Heat BEFORE it gets inside the van

Doing this made a HUGE difference on the amount of Heat gain in the Van - NICE -

With Normal window reflectors the heat is rejected by the shiny aluminum surface
AFTER the Heat (IR ) has already gone thru the glass and is Inside the Van Already -
Heating the glass and making the windshield into a Giant Solar powered 145F space heater -

with the Mylar on the OutSide of the glass it only heats up the glass to outside ambient temperature

In my case with Normal shiny reflector Inside the the glass it would heat up to 145f +

with the reflector on the Outside of the glass it would heat up to 95F
a whopping 50+ degree difference - NICE

I used Mylar sheet but Reflectics or similar could also be used -

I also covered the Roof of the van and I have not been able to collect data yet
but Im pretty sure that it will have similar results -

Next Im going to cover the UNDERSIDE of the van so it will reject Road heat -
not sure how good that will work -

I will post some pictures at some point -

PS -
the Mylar Kills cell phone reception
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post #2 of 32 (permalink) Old 07-14-2019, 09:30:PM
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A guy i work with has one of those reflectix windshield screen on the inside , it sags way back in the middle and so you know it's collecting heat like a solar oven , he could cook a chicken on his dash LOL
I agree , stop the heat before it gets in
Also if your parking in concrete parking lots they absorb heat and retain it for some time , cooler to park in a field

Last edited by Mobileempire; 07-14-2019 at 09:32:PM.
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post #3 of 32 (permalink) Old 07-14-2019, 09:34:PM
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Quote:
Originally Posted by GROOVY2 View Post

I will post some pictures at some point -
And then post from where you got the mylar.
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post #4 of 32 (permalink) Old 07-14-2019, 09:37:PM
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Have any pictures of the Mylar on roof and windshield??
Try googling shade cloth , personally I run a 5000 btu a.c. down low and I stay down low , the generator powers the a.c. and also powers a 110 volt fan in my home made roof vent , on blistering hot days I'm cool as can be as long as I stay down low and don't stand up away from the ac.

Genset runs quiet when only powering small loads like the 5000 btu

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post #5 of 32 (permalink) Old 07-14-2019, 11:03:PM
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Insul Bright from Jo-Ann works.

Plain white house wrap works.
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post #6 of 32 (permalink) Old 07-14-2019, 11:14:PM
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Adco makes these for Transit:
https://www.adcoprod.com/Class_C_Windshield_Covers

P/N 2425 Ford Transit 2015-2019
https://amzn.to/2lo2Nrd

with roll up windows
P/N 2525 Ford Transit 2015-2019
https://amzn.to/2lpBxIU

All the best,
Hein
DIYvan
541 490 5098
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post #7 of 32 (permalink) Old 07-15-2019, 08:15:AM Thread Starter
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i got mylar from amazon it is for grow rooms etc
100foot roll is $30

strong wont tear but it does scratch - not a big deal tho

can see thru it a little bit

white is not as good as aluminum but does work- aluminum claims 95% rejection IR

i have not been able to find white in wide enough materail that will be durable
house wrap could work but i dont want to buy$100 roll

i also have a HeatSheild brand reflector that goes Inside windshield -
Nice but outside mylar works 100X Better
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post #8 of 32 (permalink) Old 07-15-2019, 09:27:AM Thread Starter
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Basically the same but my van is in early stages -


[IMG][/IMG]
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post #9 of 32 (permalink) Old 07-15-2019, 12:56:PM
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Mylar scratches easily and degrades rapidly in prolonged sunlight (ask any windsurfer).

Like thousands of others, I have heat rejecting film applied to the inside of my front windows. I went with 3M's version and it made a very noticeable reduction in heat - so much so, that my stock a/c is too much for even the hottest desert days and I now run with the heater cracked open when the AC is on lol.

From an engineering perspective, I doubt there would be much if any measurable benefit in placing the reflective surface on the outside, since the objective is to reflect the heat back outside From what I have see, very little of the heat trapped in the glass layer is transferred to the inside.

I do like the idea of putting reflective film on the exterior metal parts - although you run the risk of blinding oncoming drivers/riders if the sun is at the wrong angle. you get this with highly polished aluminum trucks/trailers.
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Quigley Transit mid roof, work truck, equipment hauler and occasional camper
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post #10 of 32 (permalink) Old 07-15-2019, 01:35:PM
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I ran this test several years ago while parked in Panamint Valley next door to Death Valley. I draped Tyvek across one half of the driver's window. A few minutes later, the exposed portion measured 135°F. The covered portion measured 104°F, which was ambient. After covering all windows with Tyvek, I was reasonably comfortable even in the middle of the day with nothing more than the MaxxAir. I opened window/door on whichever side was in the shade and was able to maintain close to ambient in the van. (Ceiling has 2” Thinsulate.)

An advantage of Tyvek over Mylar is that it doesn’t block all the light. It’s more like having a heavy layer of frost—quite pleasant, actually. Amazon sells plain white without logos at about $4/yard. Kite makers use it.
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