Cfm

[Kymike]

I'm sticking with this job for about another year then try and get into the hvac trade. They have taught me the basics. And I've learned a lot on my own and in here. Maybe someone would give me a chance.

[schr8er]

The usual rule-of-thumb is 400 square feet per 1 ton of cooling, but there are other factors. For your region and general temps it's about 1.5 tons for 600-1000 sqft. If the buildings are underinsulated, or have a sh*t-ton of windows, this would be insufficient to cool the space, especially for upstairs apartments.

It could very well be an airflow problem, damaged ductwork or something, if it's happening in random units. Out here in central TX, a big cause of that are raccoons and squirrels in the walls and attic.

[Kymike]

Not sure about the insulation but there aren't a bunch of windows.