SAS920WHL

Programmable Hydronic Floor Heating Thermostat with Tactile Buttons

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Universal Box Fit: Fits UK, EU round, and China 86 wall boxes.

Tactile Buttons: Durable mechanical buttons for intuitive control.

Precise Control: High accuracy of ±0.5°C for maximum comfort.

Hydronic Ready: Ideal for boilers, actuators, and zone valves.

7-Day Programming: Flexible scheduling to optimize energy savings.

Heavy Duty Terminals: Large diameter for easy and secure wiring.

Hydronic floor heating thermostat with tactile buttons for manual HVAC control

Hydronic floor heating controller right side view showing high-quality finish

Home Product Residential Thermostats Hydronic Thermostats

Product Feature

Efficiently manage your comfort with this professional-grade programmable hydronic floor heating thermostat. Designed for precise HVAC control, it features tactile mechanical buttons and a 3-inch HD LCD for superior durability over touchscreens. Its unique universal mounting plate ensures a perfect fit for UK, EU round, and China 86 wall boxes, making it the top choice for global HVAC retrofits and new installations. Compatible with gas boilers, thermal actuators, and zone valves, it offers ±0.5°C precision and optional Modbus RS485 for seamless BMS integration. Optimize energy savings with a 7-day schedule and smart Tuya WiFi remote management.

Key Functions

7-Day Schedule

Set distinct temperatures for different periods daily to optimize energy efficiency.
Frost Protection

Automatically starts heating to prevent hydronic pipes from freezing in extreme cold.
Power-off Memory

Retains all programming and user settings automatically after a power loss.

Child Lock

Prevents unauthorized setting changes, ensuring home and project safety.
BMS Integration

Optional Modbus RS485 protocol for centralized commercial HVAC management.
Floor Limit Sensor

Supports NTC external sensors to avoid floor overheating and protect wood/laminate flooring.

Product Selector

Model No.

Heating

Cooling

Wired

Humidity

Programmable

Relay

Link with boiler

External Sensor

Modbus

WIFI

Power

Manual

SAS920XWHL-7

√

220VAC

download

SAS920XWHL-7W

√

220VAC

download

SAS920XWHL-7(P)-S

√

220VAC

download

SAS920XWHL-7RH-485

√

220VAC

SAS920XWHL-7W-WIFI(TY)

√

220VAC

download

SAS920XRCH-7W-WIFI(TY)

√

220VAC

download

Product Parameters

Power supply: 100-240V AC, 50/60Hz

Maximum load electric current: 250VAC 3（2）A

Room temperature setting range: 5°C to 35°C

Accuracy: ±0.5°C

Dimensions: 88mm X 88mm X13mm

Product Application Scenarios

Application Scenarios: Ideal for residential hydronic projects, luxury villas, and commercial HVAC retrofits where reliability and multi-box compatibility (UK/EU/China) are essential.

luxury apartments

apartments

Residential

Partnership & OEM/ODM Support

As a leading HVAC control manufacturer, Saswell provides comprehensive support to global distributors:

Fast Customization

7-day rapid prototyping and flexible OEM/ODM options.
Technical Assistance

Expert guidance for Modbus RS485 integration and UFH system wiring.
Global After-sales

Reliable warranty and responsive technical support across all regions.

FAQ

Yes. The thermostat features a universal mounting design compatible with standard UK wall boxes, European round boxes, and China 86-type square boxes, perfect for international retrofits.

Absolutely. It is designed for hydronic systems, controlling gas boilers, thermal actuators, and zone valves via a stable 3A relay output.

Tactile mechanical buttons offer superior durability, clear physical feedback, and better performance in humid environments, making them ideal for long-term reliability.

It supports an NTC external sensor to monitor floor temperature. If the floor exceeds the set limit, the system stops heating to protect sensitive flooring materials.

Yes, the WiFi-enabled version connects to the Tuya Smart / Smart Life App for remote scheduling and energy management via smartphone.