This patent pertains to patient contact compensating wheelchairs. One implementation includes a motorized base that includes a battery and a seat positioned above the base. In one instance, the seat can include a moisture permeable structure configured to support a patient and a fan configured to move air below the moisture permeable structure to carry moisture from the patient away from the moisture permeable structure. Another implementation includes a set of patient contact objects configured to alternatively contact first and then second portions of an underside of the moisture permeable structure so that at a first time more of the patients weight is supported at the first portion than at the second portion and at a second time more of the patients weight is supported at the second portion than at the first portion, to relieve contact pressure of the patient.
