A stairlift is a mechanical device for lifting people up and down stairs. For sufficiently wide stairs, a rail is mounted to the treads of the stairs. A chair or lifting platform is attached to the rail. A person on the chair is lifted as the chair moves along the rail. Stairlifts are used by people of all ages and child car seats can usually be fixed to a standard stairlift seat using the seat belt provided with the stairlift system. Stairlifts are known variously as stair lifts, stair-lifts, chair lifts, stair glides and by other names. Stairlifts are used on both a permanent and temporary basis. Stairlifts are relatively affordable and can be purchased and installed for persons that are injured or impaired for a limited time. An average installed cost of around $2,500 allows for this