replacing your old furnace and cooling system with new, low energy consuming central furnace and cooling system is a great start. but to make sure that you get the best performance, the new system must be properly implemented. this is no gimmick, an incorrect implemented system can reduce energy efficiency by up to 30 percent — costing you more on your routine repair costs and possibly shortening the system’s longevity. . . . → Read More: proper setup of furnace and cooling system