This graphic shows project teams the average energy savings (kWh) associated with each measure over a 2019 Title 24 code prescriptive home located in Climate Zone 11. The project team should refer to this graphic to get an estimate of the energy savings they can achieve for a specific measure if the other aspects of the project are meeting 2019 Title 24 prescriptive requirements.
Learn More About 2019 Title 24 Code Compliance
Prescriptive Approach: The Prescriptive Approach is the more rigid pathway, in which each requirement must be met as a stand-alone feature, not allowing for Performance trade-offs between features.
Performance Approach: The Performance Approach is considered the most flexible compliance method. It can be used to analyze and demonstrate compliance for buildings that do not comply with the Prescriptive method. The Performance Approach allows trade-offs when Prescriptive requirements cannot be met and another system can make up the deficit, which allows the project to comply overall.
Note: Mandatory measures must be met regardless of the compliance approach
NEEA Rated Heat Pump Water Heater ≥ 3.0 UEF
In the 2019 Title 24 code, the prescriptive requirement for a standard heat pump water heater is 2.0 UEF water heater located in the garage with compact distribution credit. The efficiency of a heat pump water heater is measured in uniform energy factor (UEF). The higher the UEF, the higher the efficiency of the water heater and therefore higher the savings.
Heat Recovery Ventilator (HRV) – 65% heat recovery effectiveness
The simplest IAQ fan system is an exhaust fan/bathroom fan that meets the criteria in ASHRAE Standard 62.2 for air delivery and minimal noise. More advanced IAQ fan systems that have a supply or both supply and exhaust fans (balanced ventilation) are possible. The 2019 code does not have any prescriptive requirement for HRV. So, if a project team installs an HRV, then the project is going to get significant energy savings.
High Efficiency Heat Pump (9.0 HSPF, 15 SEER)
The efficiency of an air conditioning system is measured by the Seasonal Energy Efficiency Ratio (SEER) and the Heating Seasonal Performance Factor (HSPF). The greater the SEER and HSPF, the more efficient the HVAC system. The Federal Standards for HVAC systems less than 45,000 Btu/hr is 14 SEER and 8.2 HSPF.
High Efficiency Heat Pump (9.5 HSPF, 16 SEER)
The efficiency of an air conditioning system is measured by the Seasonal Energy Efficiency Ratio and the Heating seasonal performance factor (HSPF). The greater the SEER and HSPF, the more efficient the HVAC system. The Federal Standards for HVAC systems less than 45,000 Btu/hr is 14 SEER and 8.2 HSPF.
Quality Insulation Inspection (QII)
Properly installed insulation is critical for a home to perform as designed. This measure ensures proper insulation installation by having a third party HERS rater inspect and verify. In the 2019 Title 24 code, QII has become a prescriptive measure which means having QII in your project will not give you additional savings but not doing QII will give the project a penalty on the compliance and energy savings.
Whole House Fan (WHF)
A whole house fan can greatly reduce the energy needed to cool a home. When outside temperatures cool down to a comfortable level, the whole house fan is used to rapidly bring cool outdoor air into the house. The whole house fan is prescriptively required in climate zone 11. For this climate zone, the graphic shows a penalty for not installing a whole house fan.
High Performance Walls (0.045 U-Factor)
The 2019 Title 24 code prescriptive requirement for an above grade framed wall is 0.048 U-factor. A lower U-factor means there is better wall insulation and therefore higher energy savings. In the 2016 Title 24 code, the prescriptive requirement for the wall is 0.051 U-factor.
High Performance Fenestration (0.24 U-Factor)
The U-factor determines the efficiency of glazing products. A lower U-factor mean less heat gets through the window via conduction and solar radiation. The 2019 Title 24 code prescriptive requirement for fenestration is maximum 0.30 U-factor. In the 2016 Title 24 code, the prescriptive requirement for fenestration was 0.32 U-factor.