End-Use Savings Shapes

Heat Pump Boiler With Gas Backup For Gas Backup Scenario: • 61.9% stock heating gas savings (512 TBtu) . 83.2% stock heating electricity increase (164 TBtu) • Large reduction in stock natural gas heating and increase in electric heating from electrifying boilers • Gas backup shows slightly higher gas consumption and lower electricity consumption. Stock Site Energy by Fuel and End Use Annual Energy Consumption (TBtu) 1200 1000- 800- 42.5 827.5 45.5 315.5 45.5 305.7 600- 400- 362.0 369.7 Heat Rejection, Electricity Heat Recovery, Electricity Pumps, Electricity Refrigeration, Electricity Exterior Lighting, Electricity Water Systems, Other Fuel Water Systems, District Heating Water Systems, Natural Gas Water Systems, Electricity Heating, Other Fuel Heating, District Heating Heating, Natural Gas Heating, Electricity Interior Lighting Electricity Electric Backup Scenario: Less gas heat, more electric heat 200 197.6 0 Baseline HP Boiler G Backup HP Boiler E Backup G = gas backup E = electric backup NREL 32

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