Sunnyvale City Council
August 12, 2025

Summary of Compliance Requirements
Table 1. Summary of Requirements if Using a Heat Pump
Ducts State Code Requirements Additional Local Code
Requirements
Existing
 Duct sealing (10% leakage)
 Airflow efficiency (300 CFM/ton)
 Refrigerant charge verification
 None
New
 Duct sealing (5% leakage)
 Airflow efficiency (350 CFM/ton)
 Fan efficacy (0.58 W/CFM)
 Refrigerant charge verification
 Attic insulation (R-49)
 Air sealing
 R-8 Duct insulation
 None
T
able 2. Summary of Requirements if Using a Furnace
Ducts State Code Requirements Additional Local Code
Requirements
Existing  Duct sealing (10% leakage)
 Airflow efficiency (300 CFM/ton)
 Fan efficacy (0.45
watts/CFM)
 Attic insulation (R-49)
 Air sealing
New
 Duct sealing (5% leakage)
 Airflow efficiency (350 CFM/ton)
 Fan efficacy (0.45 W/CFM)
 Attic Insulation (R-49)
 Air sealing
 R-8 Duct insulation
 Fan efficacy (0.35
watts/CFM)
Attachment 3