CenterPoint Energy

Efficiency Pays Calculator
Step 1: Select and enter either therms per year or annual gas charges from your bill.
by therms    by Cost
Step 2: Please indicate if you have a gas water heater as it will be subtracted from the calculation
check box if you have a gas water heater: (reduces 20% of annual gas charges)
Step 3: Select your current heating system's AFUE
Current AFUE is: % Efficiency