FREEZER CALCULATION for STRONG USERS

[Giannis]

Hello,

I Have a Freezer room, (-18) 125m X 48m X 12m Height

There is only one automatic fast door opening 300times/week 4m X 3m

the are outside the door has always 20C and the freezer always -18C

The isolation is polyurethan Panel 23cm

How can i calculate the looses because of the door ?

[TXiceman]

ASHRAE provides an air exchange method for an open door.

[Peter_1]

Moisture ingress is more important than the heat ingress

[chemi-cool]

Why not install air curtain on the inside of the door?
It will eliminate the cold air from going out and keep the moisture out.