Innovation never felt so good.™ Merit® Series G43 Gas Furnace ECONOMICAL, HIGH-EFFICIENCY GAS HEATING Excellent efficiency can save you hundreds of dollars each year Duralok Plus® Heat Exchanger – Made of patented ArmorTuf™ aluminized steel that’s life-tested to 2-1/2 times standard requirements (ANSI Standard Z21.47) for long life and durability.
