Bosch RT800 Wired Room Thermostat – MPN 7738112961 – Colour Touch Display with Humidity Sensor
Bosch RT800 Wired Room Thermostat – MPN 7738112961 – Colour Touch Display with Humidity Sensor
The Bosch RT800 is a wired programmable room thermostat with a 2.4" colour TFT touch display, built-in humidity sensor, and a clean, modern design. It connects directly to the boiler via the EMS bus — no batteries, no WiFi required for basic operation — giving instant, reliable temperature and schedule control from the wall. Up to four RT800s can be integrated in a single system for multi-zone heating control across up to four independent circuits.
For homeowners who want remote access, the RT800 is compatible with the Bosch HomeCom Easy app when paired with the Connect Key K30 or K40 gateway (sold separately). This enables full remote monitoring and control via smartphone — ideal for second homes, rental properties, or everyday convenience. Compatible with Worcester Bosch Greenstar gas and oil boilers, and Bosch CS7800i heat pumps.
Technical Specifications
| Parameter | Value |
|---|---|
| MPN / Product number | 7738112961 |
| EAN / GTIN | 4062321612122 |
| Display | 2.4" TFT colour display with graphics and clear text |
| Controls | 7 touch buttons |
| Built-in sensors | Temperature + humidity |
| Connection type | Wired — EMS bus (powered via boiler) |
| Max heating circuits | Up to 4 (with up to 4 × RT800 thermostats) |
| App connectivity | HomeCom Easy app — via Connect Key K30 or K40 gateway (sold separately) |
| Mounting | Wall mounted |
| Colour | White |
| Dimensions (W × H × D) | 95 × 116 × 21mm |
| Net weight | 0.35 kg |
| Boiler Plus compliance | Yes — time and temperature control |
| Warranty | 2 years |
| Manufacturer | Worcester Bosch Group (Bosch Thermotechnology) |
Key Features
2.4" colour touch display
The full-colour TFT screen shows the current temperature, target setpoint, humidity reading, and schedule information at a glance. Seven touch buttons give direct access to all functions without navigating nested menus — straightforward for all household members to use.
Wired — no batteries, no WiFi drops
The RT800 is powered via the EMS bus connection to the boiler — no batteries to change, no wireless signal to lose. Direct wired control is more reliable than wireless in properties with thick walls or signal interference, and gives immediate response with no radio polling delay.
Built-in humidity sensor
Displays live room humidity alongside temperature — useful for identifying damp, condensation risk, or air quality issues. Humidity monitoring is especially valuable in new-build properties or well-sealed homes where ventilation management is important.
Up to 4-zone multi-circuit control
Up to four RT800 thermostats can be connected to one boiler, each controlling an independent heating circuit — ideal for new builds, apartments, or larger properties with separate zone valves. Each zone has its own temperature target and weekly schedule.
HomeCom Easy app — optional remote access
When paired with the Bosch Connect Key K30 or K40 gateway (sold separately), the RT800 becomes fully app-controllable via the HomeCom Easy app on iOS and Android — no native WiFi required in the thermostat itself. Change setpoints, view temperatures, and adjust schedules from anywhere.
Boiler Plus compliant
The RT800 satisfies the time and temperature control requirements of the Boiler Plus regulations (England) as a programmable room thermostat, making it a compliant replacement control for both new installations and boiler change-outs.
Bosch Connect Key K30 RF Gateway | Bosch Connect Key K40 Gateway | Worcester Bosch Greenstar 4000 Boiler | Worcester Bosch Greenstar 8000+ Boiler | Bosch CS7800i Air Source Heat Pump
Original: $180.86
-65%$180.86
$63.30Bosch RT800 Wired Room Thermostat – MPN 7738112961 – Colour Touch Display with Humidity Sensor
The Bosch RT800 is a wired programmable room thermostat with a 2.4" colour TFT touch display, built-in humidity sensor, and a clean, modern design. It connects directly to the boiler via the EMS bus — no batteries, no WiFi required for basic operation — giving instant, reliable temperature and schedule control from the wall. Up to four RT800s can be integrated in a single system for multi-zone heating control across up to four independent circuits.
For homeowners who want remote access, the RT800 is compatible with the Bosch HomeCom Easy app when paired with the Connect Key K30 or K40 gateway (sold separately). This enables full remote monitoring and control via smartphone — ideal for second homes, rental properties, or everyday convenience. Compatible with Worcester Bosch Greenstar gas and oil boilers, and Bosch CS7800i heat pumps.
Technical Specifications
| Parameter | Value |
|---|---|
| MPN / Product number | 7738112961 |
| EAN / GTIN | 4062321612122 |
| Display | 2.4" TFT colour display with graphics and clear text |
| Controls | 7 touch buttons |
| Built-in sensors | Temperature + humidity |
| Connection type | Wired — EMS bus (powered via boiler) |
| Max heating circuits | Up to 4 (with up to 4 × RT800 thermostats) |
| App connectivity | HomeCom Easy app — via Connect Key K30 or K40 gateway (sold separately) |
| Mounting | Wall mounted |
| Colour | White |
| Dimensions (W × H × D) | 95 × 116 × 21mm |
| Net weight | 0.35 kg |
| Boiler Plus compliance | Yes — time and temperature control |
| Warranty | 2 years |
| Manufacturer | Worcester Bosch Group (Bosch Thermotechnology) |
Key Features
2.4" colour touch display
The full-colour TFT screen shows the current temperature, target setpoint, humidity reading, and schedule information at a glance. Seven touch buttons give direct access to all functions without navigating nested menus — straightforward for all household members to use.
Wired — no batteries, no WiFi drops
The RT800 is powered via the EMS bus connection to the boiler — no batteries to change, no wireless signal to lose. Direct wired control is more reliable than wireless in properties with thick walls or signal interference, and gives immediate response with no radio polling delay.
Built-in humidity sensor
Displays live room humidity alongside temperature — useful for identifying damp, condensation risk, or air quality issues. Humidity monitoring is especially valuable in new-build properties or well-sealed homes where ventilation management is important.
Up to 4-zone multi-circuit control
Up to four RT800 thermostats can be connected to one boiler, each controlling an independent heating circuit — ideal for new builds, apartments, or larger properties with separate zone valves. Each zone has its own temperature target and weekly schedule.
HomeCom Easy app — optional remote access
When paired with the Bosch Connect Key K30 or K40 gateway (sold separately), the RT800 becomes fully app-controllable via the HomeCom Easy app on iOS and Android — no native WiFi required in the thermostat itself. Change setpoints, view temperatures, and adjust schedules from anywhere.
Boiler Plus compliant
The RT800 satisfies the time and temperature control requirements of the Boiler Plus regulations (England) as a programmable room thermostat, making it a compliant replacement control for both new installations and boiler change-outs.
Bosch Connect Key K30 RF Gateway | Bosch Connect Key K40 Gateway | Worcester Bosch Greenstar 4000 Boiler | Worcester Bosch Greenstar 8000+ Boiler | Bosch CS7800i Air Source Heat Pump
Product Information
Product Information
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Shipping & Returns
Description
The Bosch RT800 is a wired programmable room thermostat with a 2.4" colour TFT touch display, built-in humidity sensor, and a clean, modern design. It connects directly to the boiler via the EMS bus — no batteries, no WiFi required for basic operation — giving instant, reliable temperature and schedule control from the wall. Up to four RT800s can be integrated in a single system for multi-zone heating control across up to four independent circuits.
For homeowners who want remote access, the RT800 is compatible with the Bosch HomeCom Easy app when paired with the Connect Key K30 or K40 gateway (sold separately). This enables full remote monitoring and control via smartphone — ideal for second homes, rental properties, or everyday convenience. Compatible with Worcester Bosch Greenstar gas and oil boilers, and Bosch CS7800i heat pumps.
Technical Specifications
| Parameter | Value |
|---|---|
| MPN / Product number | 7738112961 |
| EAN / GTIN | 4062321612122 |
| Display | 2.4" TFT colour display with graphics and clear text |
| Controls | 7 touch buttons |
| Built-in sensors | Temperature + humidity |
| Connection type | Wired — EMS bus (powered via boiler) |
| Max heating circuits | Up to 4 (with up to 4 × RT800 thermostats) |
| App connectivity | HomeCom Easy app — via Connect Key K30 or K40 gateway (sold separately) |
| Mounting | Wall mounted |
| Colour | White |
| Dimensions (W × H × D) | 95 × 116 × 21mm |
| Net weight | 0.35 kg |
| Boiler Plus compliance | Yes — time and temperature control |
| Warranty | 2 years |
| Manufacturer | Worcester Bosch Group (Bosch Thermotechnology) |
Key Features
2.4" colour touch display
The full-colour TFT screen shows the current temperature, target setpoint, humidity reading, and schedule information at a glance. Seven touch buttons give direct access to all functions without navigating nested menus — straightforward for all household members to use.
Wired — no batteries, no WiFi drops
The RT800 is powered via the EMS bus connection to the boiler — no batteries to change, no wireless signal to lose. Direct wired control is more reliable than wireless in properties with thick walls or signal interference, and gives immediate response with no radio polling delay.
Built-in humidity sensor
Displays live room humidity alongside temperature — useful for identifying damp, condensation risk, or air quality issues. Humidity monitoring is especially valuable in new-build properties or well-sealed homes where ventilation management is important.
Up to 4-zone multi-circuit control
Up to four RT800 thermostats can be connected to one boiler, each controlling an independent heating circuit — ideal for new builds, apartments, or larger properties with separate zone valves. Each zone has its own temperature target and weekly schedule.
HomeCom Easy app — optional remote access
When paired with the Bosch Connect Key K30 or K40 gateway (sold separately), the RT800 becomes fully app-controllable via the HomeCom Easy app on iOS and Android — no native WiFi required in the thermostat itself. Change setpoints, view temperatures, and adjust schedules from anywhere.
Boiler Plus compliant
The RT800 satisfies the time and temperature control requirements of the Boiler Plus regulations (England) as a programmable room thermostat, making it a compliant replacement control for both new installations and boiler change-outs.
Bosch Connect Key K30 RF Gateway | Bosch Connect Key K40 Gateway | Worcester Bosch Greenstar 4000 Boiler | Worcester Bosch Greenstar 8000+ Boiler | Bosch CS7800i Air Source Heat Pump
