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Main image of X2P Programmable Thermostat, White | RTH20B Single-Stage, 1 Heat/1 Cool Compatibility, 5-2 Day Schedule

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X2P Programmable Thermostat, White | RTH20B Single-Stage, 1 Heat/1 Cool Compatibility, 5-2 Day Schedule

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CUSTOMIZE: Choose to receive change air filter reminders and select display settings to optimize this thermostat for home. The RTH20B is a direct replacement for the RTH2300, and a replacement for the RTH221, offering 5-2 day programming. SCHEDULE: Personalize settings in 5-2 day increments - there is also a non-programmable option. EXPERIENCE: A large screen and clear font enhance daily operation. INSTALLATION: The UWP wall plate provides a simple installation process and facilitates future device upgrades. COMPATIBILITY: 1 Heat/1 Cool, 750 mV, hot water heat, forced air (gas, oil, or electric). It is not compatible with electric baseboard heat (120-240V). POWER: Requires 2 AA batteries (not included)

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CUSTOMIZE: Choose to receive change air filter reminders and select display settings to optimize this thermostat for home. The RTH20B is a direct replacement for the RTH2300, and a replacement for the RTH221, offering 5-2 day programming.
SCHEDULE: Personalize settings in 5-2 day increments - there is also a non-programmable option.
EXPERIENCE: A large screen and clear font enhance daily operation.
INSTALLATION: The UWP wall plate provides a simple installation process and facilitates future device upgrades.
COMPATIBILITY: 1 Heat/1 Cool, 750 mV, hot water heat, forced air (gas, oil, or electric). It is not compatible with electric baseboard heat (120-240V).
POWER: Requires 2 AA batteries (not included)

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First Listed on Newegg	August 06, 2026

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Item#: 9SIC84EM3U1810