During the Summer I really care about to do our grocery shopping late at night! All of us have this 24 hour a day grocery store in town that is perfect for this, however it is the best time to shop because most people are sleeping and it is so easy to move around the store without the mobs of crowds. The other good thing about it is that their central a/c method undoubtedly flows well with minimal people in there. Also the fact that they have Heating, Ventilation, and A/C zone control in the site makes it even better. They originally did not have Heating, Ventilation, and A/C zone control, but because of how crowded it gets in the normal hours and with the doors always opening and closing, this lets the super boiling or super frigid outside temperatures in the store, with having Heating, Ventilation, and A/C zone control, they can get a better handle on this and have perfect temperature control even with all the odd air coming in and out of the store making it kind of uneven in sections. At night, the Heating, Ventilation, and A/C zone control undoubtedly works great. The entire store is the same temperature, then not too boiling and not too cold, it is always just right, even in the frozen food section where it occasionally gets a little too frigid even in the summer. Everything is just so perfect with the Heating, Ventilation, and A/C zone control that they have in this twenty multiple hour grocery store here in our local town. It is a commercial zone controlled heating and a/c method too. This makes the large difference!