HERS Testing Trigger Sheet
NCI Blower Table
NCI Duct Design Tables
Wet Bulb Temperature to Enthalpy Conversion Table
Minimum Cooling Efficiencies for Central Air Conditioners and Heat Pumps
Table 150.0-C: Return Duct Sizing for Single Return Duct System
Table 150.0-D: Return Duct Sizing for Multiple Return Duct Systems
Charts and Tables
HERS Testing Trigger Sheet
Additional Graphs/Charts - Membership Login Portal
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NCI Blower Table
Generic Fan Performance Data .5" Constant Speed
NCI Duct Design Table
Wet Bulb Temperature to Enthalpy Conversion Table
Minimum Cooling Efficiencies for Central Air Conditioners and Heat Pumps with Cooling Capacity Less than 65,000 BTU per hour (NR = no requirement)
Source: California Appliance Efficiency Regulations, Title 20, Table C-2 and Federal Appliance Standards
Table 150.0-C: Return Duct Sizing for Single Return Duct System
These Return Duct Size tables can be used as a compliance option instead of HERS Verified Cooling Coil Airflow & Fan Efficacy testing. These tables can only be used for compliance on a completely new HVAC system without zonal controls.
Table 150.0-D: Return Duct Sizing for
Multiple Return Duct Systems
