I'm planning on making an incubator out of this freezer





I'm going to completely gut it and put in some of those wire closet shelves and brackets so I can squeeze as much space out of it as possible. Not that I need that much space right now, but I only want to do this once.

I ordered 5 feet of 11" flexwatt and a Herpstat. Both arrived today. I would like to get to the gutting and building process, but I have to figure out what fan or fans I'm going to install and how. Here are my options.

First I have two 5" muffin fans. They are both 115V fans, so just a standard extension cord will work with these. The one on the right is 13W and the one on the left is 20W. I was thinking about putting them both on the ceiling on opposite sides pointing downward. This is my easiest option.



Next, I have several microwave oven fans. These are 120V also (standard extension cord). Not sure how I would mount them or where. I actually have about 7 or 8 of these laying around.





Lastly, I have a dual squirrel cage blower fan from an over the range microwave. Its also 120V so again, just a standard extension cord will work. It is a dual speed fan, so I could just wire it up to run on the low setting.



For scale,



I was thinking this would work if I put it on the ceiling in the back, blowing down across the flexwatt that will be running from top to bottom down the back wall of the freezer.



I'm leaning towards the squirrel cage blower, but I'm sure this is overkill. Is there any reason that I shouldn't use it?

If you could use any of these options what would you go with and why?