Comment by whatevaa

Ventilating at night doesn't work at all when nights are hot. And now it happens oftenly, not sometimes. That is a bigger problem than hot days.

Also, all the activity you do inside your insulated home also increases temperature. Human body itself is a small space heater. At some point, you gotta get that energy out somehow, and if nights are hot, there is no way to do that except via a heat pump.