Whether you're looking for a tiny 24" undercounter freezer to keep a few ingredients close to the fryer, a long model with lots of storage space, or something in between, there's an undercounter fridge or freezer for just about any space, and manufacturers make lots of different sizes to accommodate the wide range of layouts in commercial kitchens.
Single Door Undercounter Refrigerators / Freezers:
Typically anything 36" or under
Two Door Undercounter Refrigerators / Freezers:
Typically anything from 36” – 72”.
Three Door Undercounter Refrigerators / Freezers:
Typically anything 72” or over.
Every manufacturer makes their product a little differently, though, and may offer different configurations. Two drawers will usually take the place of a single door.
Shallow and Deep-Depth: Most undercounter units will be about 30” to 33” deep. Some manufacturers will offer special depth options to make the unit shallower or increase depth to get a little extra storage space. These options can be really helpful when your layout prohibits a normal depth unit or gives you a little extra room to play with, so be on the lookout for these options if your space allows it!