Does pressurization make the interior warmer?

[DrZGard]

Curious for those flying the P337 without A/C, does the pressurization make the interior warmer? I am thinking of my experience flying here in Oregon/Washington on warmer days when even climbing to 10,000 feet it is still warm in the C182 or DA40.

[mshac]

Originally Posted by DrZGard

Curious for those flying the P337 without A/C, does the pressurization make the interior warmer? I am thinking of my experience flying here in Oregon/Washington on warmer days when even climbing to 10,000 feet it is still warm in the C182 or DA40.

YES. Lets talk about the system just a bit.

There are intercoolers that cool the pressurized output air somewhat before it enters the cabin. There are levers that allow these intercoolers to be bypassed, which makes the output air much warmer. This is used to warm the cabin. If this heat is insufficient, there is a gas-fired heater that can add additional warmth to the cabin.

Living in Texas, heating is far less of issue than cooling. I don't have AC on my P337H so I don't fly pressurized much below 10K unless its a cold day.
Pressurization may be engaged during flight, so once I'm high enough in cool air, I'll pressurize the cabin.

I don't think anyone operating a pressurized aircraft in a warm environment without AC uses pressurization much if at all below 10k.