California Title 24 and Honeywell Home Trade Thermostats

What is Title 24?

Title 24 of the California Code of Regulations (also known as the Energy Code) sets standards for energy efficiency, water reduction, and sustainability in new construction, additions, and alterations for residential and non-residential buildings. This code is periodically updated by the California Energy Commission (CEC). There are numerous thermostat-related standards listed in Title 24, and these standards can be specific to single-family residences, hotels, commercial buildings, and equipment types. There may be exceptions to some requirements.
California Title 24 guidelines are occasionally updated. Check the California Energy Commission webpage https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards for the most up-to-date listing. The Title 24 guidelines highlighted on this page were found in the 2025 Building Energy Efficiency Standards for Residential and Nonresidential Buildings at that page on 4-8-2026.

Honeywell Home Thermostats
Note: Select Honeywell Home Trade thermostats are listed below. Other Honeywell Home thermostats may also meet various Title 24 requirements. In general, a nonprogrammable thermostat (thermostat which doesn’t allow set-back scheduling) cannot meet Title 24.

P200 models- (TH2110U4004, TH2210U4005, TH2320U4006)
Title 24 Compliant for most common residential applications-
P200 thermostats meet single family Title 24 requirements for scheduling. These models can be set for temperature limits for heating and cooling. Models for heat pumps with auxiliary heat additionally meet requirement to lockout auxiliary heat with wired outdoor sensor.
There are many additional Title 24 requirements which may be applicable to various special installations. See the California Title 24 requirements file for other requirements if applicable.

S200 models-(TH2110WF4008, TH2320WF4010, TH2320WF4011)
Meets California Title 24 Guidelines for most common residential applications-
S200 Energy Star rated thermostats meet single family Title 24 requirements for scheduling and/or Auto Away.
Model for heat pumps with auxiliary heat additionally meet requirement to lockout auxiliary heat with wired outdoor sensor or Internet weather.
These models can be set for temperature limits for heating and cooling.
These models meet Energy Star and Demand Response utility programs.
There are many additional Title 24 requirements which may be applicable to various special installations. See the California Title 24 requirements file for other requirements if applicable.

T6 Smart models- (TH6220WF2006, TH6320WF2003)
Meets California Title 24 Guidelines for most common residential applications-
T6 Pro Smart thermostats meet single family Title 24 requirements for scheduling and/or Auto Away.
These models meet requirement to lockout auxiliary heat with wired outdoor sensor or Internet weather.
These models can be set for temperature limits for heating and cooling.
These models meet Energy Star and Demand Response utility programs.
There are many additional Title 24 requirements which may be applicable to various special installations. See the California Title 24 requirements file for other requirements if applicable.

Redlink VisionPRO models- (TH8321R1001, TH8320R1003, TH8110R1008)
Meets California Title 24 Guidelines for most common residential and light commercial applications-
Redlink VisionPRO thermostats meet single family Title 24 requirements for scheduling.
The TH8320 & TH8321 models meet requirement to lockout heat pump/auxiliary heat with wired or wireless outdoor sensor.
These models can be set for temperature limits for heating and cooling.
These models can meet Energy Star and Demand Response utility programs when used with a THM6000R7001 Redlink Internet Gateway.
For light commercial applications, these models meet additional requirements including-
Not allowing a permanent hold
Occupancy sensing/remote setback using a THM5421R1021 EIM and remote occupancy sensing switch.
There are many additional Title 24 requirements which may be applicable to various special installations. See the California Title 24 requirements file for other requirements if applicable.

ElitePRO S900 models- (THX900W1, THX900B2)
Meets California Title 24 Guidelines for most common residential and light commercial applications-
S900 thermostats meet single family Title 24 requirements for scheduling and/or Auto Away.
These models meet requirement to lockout heat pump/auxiliary heat with wired outdoor sensor or Internet weather.
These models can be set for temperature limits for heating and cooling.
These models meet Energy Star and Demand Response utility programs.
For light commercial applications, S900 meets additional requirements including-
Not allowing a permanent hold
Occupancy sensing/remote setback using a remote occupancy sensing switch
There are many additional Title 24 requirements which may be applicable to various special installations. See the California Title 24 requirements file for other requirements if applicable.

ElitePRO S1000, S1100, & S1200 models- (THX1200W5, YTHX1200W5, THX1200B6, YTHX1200B6, YTHX1200W7, YTHX1200B8, THX1100W3, THX1100B4, THX1000W1, THX1000B2)
Meets California Title 24 Guidelines for most common residential and light commercial applications-
S1000, S1100, & S1200 thermostats meet single family Title 24 requirements for scheduling and/or Auto Away.
These models meet requirement to lockout heat pump/auxiliary heat with wired or wireless outdoor sensor or Internet weather.
These models can be set for temperature limits for heating and cooling.
These models meet Energy Star and Demand Response utility programs.
For light commercial applications, these models meet additional requirements including-
Not allowing a permanent hold
Occupancy sensing/remote setback using a remote occupancy sensing switch, onboard radar sensor, and/or wireless indoor temperature, humidity, PIR sensors.
There are many additional Title 24 requirements which may be applicable to various special installations. See the California Title 24 requirements file for other requirements if applicable.