Mattress Height refers to the height of the top of the mattress above the floor. This height can vary widely and may be given in ranges when you have a bed that allows for high/low height adjustments of the bed. Even if the bed has a fixed bed deck, it is possible for the height of the mattress to be below, even with, or above the transfer height.
Height of the Side above the Mattress refers to the measurement from the top of the mattress to the top of the side wall. This measurement will also vary if the bed deck is equipped with high/ low adjustability of the mattress.
Transfer Height refers to the height of the rigid side structure of the bed frame above the floor. This height must be surpassed for an individual to get into the bed. This height does not change even if you have a bed that allows for high/low height adjustability of the mattress. Transfer Height is a concept and term that is unique to some beds that have wooden “furniture type” frames that surround the mattress, for example Beds by George.