AC & Heat Window Units
Window air conditioners have been around a long time, and there are good reasons for their staying power: they're affordable, both in terms of the unit itself and the cost of operation. They are also energy efficient, and easy to install. Some models do more than cool—you can purchase a commercial AC and heat window unit and use it year-round.
While central air is nice for cooling an entire building, it can be expensive if not all the rooms are being used—or perhaps the equipment you store in one room doesn't have to be kept as cool as the people working in another room. Your heat and air window unit allows you to efficiently cool one or two rooms, which is why it's a popular choice in residences as well as commercial and industrial spaces like offices, classrooms, conference rooms, storage spaces, and other small areas. Window air conditioners with heat pumps have the added advantage of not taking up any of that precious floor space in a small room!
Commercial and industrial heat and air window units are also ideal for temporary situations because they can be taken out of the window as easily as they were put in. Your window air conditioner simply moves with you to your new office or facility.