Out to estimate replacement of gas/electric split system. 5 ton split system, condenser in backyard, horizontal furnace in attic. Gave 3 estimates: 1 - 14 seer no zoning, 1 - 16 seer no zoning, 1 - 17 seer its zoning and redesign of ductwork with new ductwork. Client not ready to make decision at this time.