Most Flowers should be kept at 34-38 degrees, with the exception of tropicals and orchids. There is no airconditioner in the world that can hold a room at that temp. Flowers also need humidity, the air from an aircoditioner is dry air, so even if you did find a giant airconditioner to cool a room to 36 degrees, it would dry out the flowers and take away vase life. In a pinch, for event work or deliveries going out the next day, I would be OK in my shop to rely on an airconditioner to hold the flowers. I know many basement Betty's that rely on airconditioners to keep their flowers from wednesday on til sat or sun whenever the event is. It is a gamble and the flowers were never allowed to harden. Hydrangeas, roses and soft flowers are at a risk of wilting at anytime because the proper care and handling was not used. The hardening up(cooling after hydrating) stage is very inmportant for some flowers.