Preventative maintenance is essential to the proper functioning of your heating equipment. If maintenance is not performed regularly, the equipment will require extensive and costly repairs at a later date, and can be very hazardous to your health. Preventative maintenance includes regular inspections each year. During these inspections, proper operation of the equipment is checked and verified. All mechanical equipment is designed to operate within certain limits. Heating equipment is no exception, and if not properly maintained, the equipment will exceed its design limitations with the result being equipment failure.