With that model, you’d probably want 5 instead of 4 (N+1), but the other thing to consider is if you can duct the cold air to where it needs to go when one or m

With that model, you’d probably want 5 instead of 4 (N+1), but the other thing to consider is if you can duct the cold air to where it needs to go when one or more of the units has failed.