Specifying Rooftop Units for Title 24 Compliance
The California Code of Regulations has established standards for residential and commercial buildings within the California Energy Code. In Title 24, Part 6 of their Building Energy Efficiency Standards guide, the California Energy Commission outlines a list of requirements intended to reduce HVAC energy use. Many of these standards impact how a rooftop unit (RTU) should be configured in order to meet code.
Title 24 Requirements for Rooftops
The California Energy Commission maintains a list of RTU models they have certified. They also maintain a spreadsheet that lists the controllers which have been certified to meet Title 24 fault detection and diagnostics (FDD) requirements. In summary, the following conditions must be met in order for a rooftop unit to meet Title 24 requirements:
Cooling
- Return/Exhaust Option: exhaust fan or gravity damper
Economizer
- Economizer: full indoor air quality (IAQ) with full airflow measurement
- CO2 sensor
- Economizer Control: dry bulb sensor or single enthalpy sensor
- Type of Damper: ultra-low leakage
Heating
- No electric heat
The Importance of Proper Economizer Operation
Correct economizer operation is just one facet of the complete Title 24 requirements. And while the detailed specifications for Title 24 compliance may seem complex, YORK® has a high-performance rooftop product portfolio with options to meet or exceed all Title 24 and related guidelines while providing class-leading, standard-efficiency levels. To learn more about Title 24 certification for rooftop units — including the specifics regarding ventilation, FDD and other requirements, download your free copy of the complete Variable Air Volume (VAV) Application Guide for Rooftop Units
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