Separate A/C for the office.

I am building a new office in my house and put a 10,000 BTU through the wall air conditioner in; auto cool control -- like climate control in an auto works.

For an apartment get a 8,000 BTU window unit if you have a window -- free standing A/C otherwise.

Not just the heat from the equipment -- you need to be comfortable working on hot days -- then you are more productive and have time to head for Malibu. (I lived there for 8 years -- can get hot with strong Santa Anna winds for days at times ;0) ).