I recently rode on a Mesa E175 and was one of the first to board the aircraft. The cabin was already warm. Nearing the end of boarding the cabin was a sweat box and multiple passengers were complaining. Ten minutes before departure the captain reached up, starts the apu, turns on the packs and walla, the cabin cools off.

So here are my questions to regional pilots across the board. Can you tell when YOUR cabin is uncomfortably warm? Do you brief your flight attendants to inform you if it's warm? If it is warm why do you wait to start the apu?

Summer is at our doorstep and our passengers deserve better.