Huge problem

[Veneke]

I did some testing.

Very interesting indeed! Thanks!

This more or less confirms what I thought about insulation: a cooler is worth more than a layer of insulation (3v5) by a good bit, and the insulation difference between wood and stone is marginal (1v4).

The airlock certainly has an impact (the heat staggering effect mumbles mentioned), but 6-10 degrees is rather more than I would have thought given its not in active use. I wonder though, is the temperature in 2 slowly rising in the airlock section? If it is then, once that equalizes with the outside, won't 2 eventually have the same temperature as 1?

[Listen1]

As the air lock trades heat with the outiside, it also trades with the inside. So the tile in the airlock is higher than the temperature of the fridge, and lower then the outside temp.

Fun fact, air isolation (Wall - Space - Wall - Fridge) dosent work anywhere as good as double insulation. The heat exchange is too high.

[Ectoplasm]

That is excellent muffins! Thanks for taking the time to do that. Looking at those results I can instantly see that it was actually the use of wood to build the freezer that would of been the issue for me in the past.

[BlackSmokeDMax]

That is excellent muffins! Thanks for taking the time to do that. Looking at those results I can instantly see that it was actually the use of wood to build the freezer that would of been the issue for me in the past.

Wait, what? I took those numbers to mean that was the least important thing to take into consideration. Comparing the plain stone to plain wood, there was only a 1 degree difference at all 3 outdoor temps. Unless I am reading something incorrectly, of course.

[JimmyAgnt007]

I just have two doors right after each other, works well enough for me and saves a bit of space.  Did you test that at all?

[Shurp]

Thank you Muffins for providing some real experimental data.

It looks like the results are: (1) Putting more coolers helps the most, (2) airlocks and thicker walls help too. 

The airlocks probably make more of a difference when you have a large number of colonists running in an out for their daily meal.  It might be worthwhile to make a separate small stockpile with a few day's food for everyone and have the food in your main freezer marked forbidden so they leave it alone.

[JimmyAgnt007]

Maybe make the airlock really big with its own cooler and put all the meals in there?

[Rommel459]

I always use double doors when i do double walls, on the assumption that it helps with the insulation,that won't help if you have an airlock though. Another thing that would help is putting a cooler set to the same temp as the inner fridge, in the airlock itself, it should completely eliminate heat transfer when the doors open.

[EarthyTurtle]

I did some testing.

Very interesting indeed! Thanks!

This more or less confirms what I thought about insulation: a cooler is worth more than a layer of insulation (3v5) by a good bit, and the insulation difference between wood and stone is marginal (1v4).

The airlock certainly has an impact (the heat staggering effect mumbles mentioned), but 6-10 degrees is rather more than I would have thought given its not in active use. I wonder though, is the temperature in 2 slowly rising in the airlock section? If it is then, once that equalizes with the outside, won't 2 eventually have the same temperature as 1?

This answered a long standing question for me thanks!
I'm actually curious to see if this works the same way for keeping heat in. May test this as some point.

[Shurp]

Maybe make the airlock really big with its own cooler and put all the meals in there?

That's actually a pretty neat idea.  And it doesn't need to be huge, just 3x3, large enough for a week's food.  When it is about to empty set its priority to high so it gets restocked, then put it back to normal.

Another helpful tip: put your cookstove and brewery in the freezer.  (Make sure your cook has a parka