Maybe I should call it Fermentation Chiller's siamese twins?
Anyway, I was going to make 2 of the regular ones, but then I realized that I could just build one bigger one, making ice switches easier, and if I isolated the chambers with separate fans/thermostats I could have 2 different temps. This is what I came up with:
It's been in test mode for the last day and a half and the wheat on the right is chugging along at 70 while the porter on the left is holding steady at 66. I'm sure that I would have more problems if I were to try a bigger temperature differential, but we'll see when it comes time to cold crash. I think I'll put a bucket of water in one side and check the temps while the other gets chilled. Also, I put the fans in the very bottom of the divider wall. I need to add an air dam between them and the ice chambers, but other than that the thing has been a total success.
I know there was another thread on temp probe placement, but I figured that once the system is dialed I can adjust the temp at the thermostats to provide a nice steady carboy temp, it may just have to be a few deg lower to compensate for heat evolution.
Anyway, I was going to make 2 of the regular ones, but then I realized that I could just build one bigger one, making ice switches easier, and if I isolated the chambers with separate fans/thermostats I could have 2 different temps. This is what I came up with:
It's been in test mode for the last day and a half and the wheat on the right is chugging along at 70 while the porter on the left is holding steady at 66. I'm sure that I would have more problems if I were to try a bigger temperature differential, but we'll see when it comes time to cold crash. I think I'll put a bucket of water in one side and check the temps while the other gets chilled. Also, I put the fans in the very bottom of the divider wall. I need to add an air dam between them and the ice chambers, but other than that the thing has been a total success.
I know there was another thread on temp probe placement, but I figured that once the system is dialed I can adjust the temp at the thermostats to provide a nice steady carboy temp, it may just have to be a few deg lower to compensate for heat evolution.