Usually the ratings are low. If it says 80 gal
. that usually means max. With chillers, they will run all the time if they are small. They use a lot of power like a fridge. You would be better off going with a little larger one that would cool more efficiently. Therefore running less. If you don't care how much it runs then you could probably get away with the one you selected. The other thing to consider is where you buy it. I have had problems with the shipping. They are easily broken during shipping. So if you can get one at a lfs
you might be better off.