End-Use Savings Shapes

Heat Pump Rooftop Units (HP-RTUS) With Original Fuel Backup Measure Concept Replace gas and electric RTUs with HP-RTUS Variable speed, high efficiency HP-RTU Performance • . • Sizing: Compressor sized to design cooling load; backup heat sized for remainder Backup Heat: Original heating fuel type Compressor Lockout: 0°F Defrost: Reverse cycle Performance Data Source: Mix of lab testing and manufacturer performance data Applicability Buildings w/ gas or electric resistance RTUs ~36% of stock floor area, varies regionally 28% gas RTU; 8% electric RTU Backup Heat Scheme Existing system Gas RTU Electric RTU New system HP-RTU with gas backup HP-RTU with electric backup NREL | 26

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