Not sure if this is the right category for this thread but....

Does anyone have any idea how much power consumption (in continuous watts or kwh per month) it would take to keep an area the size of a typical bathroom at 21 degrees?

I intend to install a server rack running approx 10 Supermicro servers into a similar space.

This would be in Tauranga where the climate is over 21 degrees 6 months of the year which would also need to be factored in.

Thoughts?