For maximum comfort in the warm months, an affordable air conditioner a must have! A single room air conditioner can be much more cost effective than cooling the whole house when no one is home - a bonus in times of rising energy costs, and also a great benefit to the environment. Window air conditioners and through the wall coolers are very popular. Since they are halfway in the house and halfway out, the condensation can drain outside, so you don't have to bother with hoses. These are great for installing in small living spaces and, especially in bedrooms. For those in a very hot or humid summer climate pattern, a window air conditioner in the bedroom can keep you sleeping comfortably, without having the expense of cooling the whole house. Most units have thermostats and fans that can use nature's cold night air to cool your room naturally when the sun goes down.