© Copyright CalCERTS, Inc. 2019
Code Cycle: 2019 Standards Only!
Reference: 2019 CalCERTS Alterations Manual Chapter 4, Section 2
Form: Existing CF3R-MCH-22 and CF3R-MCH-23
Impact: Modified HERS test targets
Notes: Same test methods, but different airflow & fan efficacy targets
150.0(m)13d - Energy Efficiency Standards
Small Duct High Velocity Forced Air Systems. Demonstrate, in every control mode, airflow greater than or equal to 250 CFM per ton of nominal cooling capacity through the return grilles, and an air handling unit fan efficacy less than or equal to 0.62 W/CFM as confirmed by field verification and diagnostic testing in accordance with the procedures given in Reference Residential Appendix RA3.3.
EXCEPTION 1 to Section 150.0(m)13B and D:
Standard ducted systems without zoning dampers may comply by meeting the applicable requirements in TABLE 150.0-B or 150.0-C as confirmed by field verification and diagnostic testing in accordance with the procedures in Reference Residential Appendix Sections RA126.96.36.199 and RA188.8.131.52. The design clean-filter pressure drop requirements specified by Section 150.0(m)12Div for the system air filter(s) shall conform to the requirements given in TABLES 150.0-B and 150.0-C.
EXCEPTION 2 to Section 150.0(m)13B and D:
Multi-speed compressor systems or variable speed compressor systems shall verify airflow (cfm/ton) and fan efficacy (Watt/cfm) for system operation at the maximum compressor speed and the maximum air handler fan speed.
If installed, must be modeled and be properly described on CF1R-PRF-01.
- Airflow and watt draw targets will be specified.
- Airflow target - 250 cfm/ton.
- Fan watt draw target - 0.62 watts/cfm.