Traditionally your keezer will have a hard time keeping the entire area cool or a consistent temperature if you have added a collar to it. Using this method or similar we can help recirculate the air around so the warm air gets pushed to the bottom and the bottom air chills the top.
Facebook Group: / moskihomebrewgroup
Links
(Note: some of these items can be found cheaper from your local hardware store)
120V Fan: https://amzn.to/2vuJiCN
Alternate Fan (one we used is expensive now?): https://amzn.to/3eLVAqY
4" PVC Pipe 24" Length: https://amzn.to/2TZrE3C
4" PVC 90: https://amzn.to/3wTrL1s
4" PVC Flange: https://amzn.to/2WiFdg1