Out of genuine curiosity, what is the difference between using a main and backup t-stat on a single 30-tub ARS rack vs. three 10-tub racks? A lot of sellers offer individual racks that are stackable. Is it safer not to stack these and instead have a row of racks 3 tubs high and each with their own t-stat system?
I one hundred percent agree with using back-up t-stats but I don't understand how stacking racks or using (3) 10 tub racks instead of (1) 30 tub rack per t-stat main/backup is less safe?