Specifications include, but are not limited to: MSRP - - CENTRAL HEATING and AIR CONDITIONIN SYSTEM, COMPLETE : 115-651: Contractor to calculate the prope size of all HVAC equipment and materials. Install/Replace a Centra HVAC system with a properly sized, high efficiency (14 SEER) Central heating and air conditioning unit per specifications. Al permits, duct sheet & inspection form, green tag. Installation t include removal of existing system and all its components and to b replaced with new parts and equipment to. Enter tonnage of unit a units of measure Comments: Approx. 400 sq.ft per ton. in estimate. MSRP - - CENTRAL HEATING and AIR CONDITIONIN SYSTEM, COMPLETE : 115-651: Contractor to calculate the prope size of all HVAC equipment and materials. Install/Replace a Centra HVAC system with a properly sized, high efficiency (14 SEER) Central heating and air conditioning unit per specifications. Al permits, duct sheet & inspection form, green tag. Installation t include removal of existing system and all its components and to b replaced with new parts and equipment to. Enter tonnage of unit a units of measure Comments: Approx. 400 sq.ft per ton. in estimate.