Dawson Company

August 28, 2025

8:30-12noon

Who Should Attend: Plumbing Engineers/ Plumbing Engineers for Design/Build Contractors

Topics to be Covered:

• Overview of heat pump refrigerant cycle

• Discuss Minimum Lift and Water Side DeltaT

• Current 3rd Party Testing Standards (Energy Star, DOE, AHRI Standard 1300)

• Typical refrigerants used for CHPWH

• General design considerations

• “Single-Pass” vs. “Multi-Pass” configurationvs. piping schematic

• Peak and off-peak scenario hydronic analysis

• General comments on “single-pass” vs.“multi-pass”, pro’s/cons

• Electric Swing Tank vs. Electric Backup –hydronic analysis

• General comments vs. gas-fired, ASPE Fixture Tables

• CHPWH Sizing Methods-Peak/Off-Peak Sizing Method-Ecotope Sizing Method-CBECC-Res 2019 Sizing Method

• Other Sizing Methods – ASHRAE Load Profile

• Sizing example with CHPWH Sizing Methods