My point was, before we get too far we really need the actual load. Then you size the HVAC to the sensible heat from the hardware, plus the latent heat and the room load.
I agree you don't need the HVAC on the UPS if he is going to have generator backup.
Are these 30 servers redundant access to the same system or do they all need to up? That can make a difference too.
In real life, if he wants his availability to be anything in the "nines" he should have an alternate site. There is just too much that can happen in a system with a single point of failure like that. (Earthquake, flood, fire, criminal mischief etc). The biggest single point of failure is probably his broadband carrier anyway.
