Air exchangers can be energy efficient. To make sure you have the maximum efficiency your air exchanger can provide, the location of it is important. The air exchanger should be able to circulate air into all rooms of your home. This also includes the attic and basement of your home. Several points of air intake and exiting are also part of the air circulation process. Some air exchanger equipment is installed in the attic or basement of your home for the most optimal production it can provide.