Comments on: Why Doesn’t Frost Form in the Carport?

By: Brian Robinson

Brian Robinson — Thu, 05 Mar 2020 01:53:15 +0000

Double and triple pane
Double and triple pane thermal window inserts are awesome at stopping condensation and work great in combination with cellular shades for us true Northeast energy geeks.

By: Jeffrey Rhodin

Jeffrey Rhodin — Mon, 02 Mar 2020 15:43:31 +0000

Great explanation! The old
Great explanation! The old night sky effect. Gotta put in a plug for ASHRAE Standard 55 here. Great reading for data-driven energy geeks.

By: abailes

abailes — Wed, 26 Feb 2020 19:24:18 +0000

In reply to Jordan. Touché!

Touché!

By: Jordan

Jordan — Wed, 26 Feb 2020 19:00:56 +0000

In reply to abailes. They do exist! It would be
They do exist! It would be another window--specifically, the inner pane of 2- or 3- pane windows.

By: Jim Coler

Jim Coler — Wed, 26 Feb 2020 14:23:56 +0000

I don't believe it's
I don’t believe it’s radiating the heat to the sky because wouldn’t it be radiating the heat from under the roof out at an angle towards the sky? I still believe it’s a result of moisture in the air falling out like dew at night time when the temperatures drop below the “Dew” point!

By: abailes

abailes — Tue, 25 Feb 2020 22:09:36 +0000

In reply to Arthur Beeken. Heh heh heh!

Heh heh heh!

By: abailes

abailes — Tue, 25 Feb 2020 22:08:08 +0000

In reply to LeeH. Lee, yes, you're right. Just

Lee, yes, you're right. Just about any window covering will worsen the condensation potential of a window because it lowers the temperature of the glass by insulating it from the room. But without an air barrier, the water vapor in the room air can still find the cold glass. The only type of interior window covering that wouldn't make it worse is one that's insulating and airtight, and I'm not sure those exist.

By: LeeH

LeeH — Tue, 25 Feb 2020 22:03:57 +0000

In reply to abailes. Maybe you intended this by
Maybe you intended this by inference, but I would say the condensation would be worse due to the cellular shades.

By: abailes

abailes — Tue, 25 Feb 2020 20:03:26 +0000

In reply to Dave. Dave, well, now that the

Dave, well, now that the secret is out, OK. Yeah, I've been sleeping in the car but it's not because of the "plush reclining front seat." It's because I love having an electric car!

By: abailes

abailes — Tue, 25 Feb 2020 20:01:03 +0000

In reply to Thomas Dugan. Thomas, I've had those shades

Thomas, I've had those shades in the past and loved them. They do block the radiant heat transfer, but they won't stop condensation on the windows if it's cold enough.