Equipment which is primarily and customarily used for a nonmedical purpose may not
                  be considered “medical” equipment for program payment even though the item has some remote medically related
                  use. For example, for a cardiac patient, an air conditioner might possibly be used
                  to lower room temperature to reduce fluid loss in the patient and to restore an environment
                  conducive to maintenance of the proper fluid balance. Nevertheless, because the primary
                  and customary use of an air conditioner is a nonmedical one, the air conditioner  cannot be deemed to be medical equipment for which payment can be made.
               
               Other devices and equipment used for environmental control or to enhance the environmental
                  setting in which the beneficiary is placed are not considered covered DME. These include
                  room heaters, humidifiers, dehumidifiers, and electric air cleaners. Equipment which
                  basically serves comfort or convenience functions or is primarily for the convenience
                  of a person caring for the patient such as elevators, stairway elevators, posture
                  chairs, and cushion lift chairs do not constitute medical equipment. Similarly, physical
                  fitness equipment, e.g., an exercycle; first-aid or precautionary-type equipment,
                  e.g., preset portable oxygen units; self-help devices, e.g., safety grab bars; and
                  training equipment, e.g., speech teaching machines and braille training texts, are
                  considered nonmedical in nature.