*Savings are realized by comparing the BTU/hr output of a 93% Effinity⁹³ to a 78% seasonally efficient power-vented unit heater and a 65% seasonal efficient gravity-vented unit heater. Costs were determined by applying the appropriate degree days at 65° indoor design temperature under full year, 24/7 operation to each state's 2008 average price/therm of gas. Actual will vary based on numerous factors such as fuel prices, installation, building use and/or construction.