SAS921WHL

WiFi Smart Hydronic Floor Heating Thermostat

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48-Period/Day Ultra-Fine 7-Day Energy Saving Programming

Triple Control Modes: Room, Floor, and Dual Limitation

Synchronized Boiler and Valve Control for High Efficiency

High-Precision Temperature Control (±0.5°C Accuracy)

Seamless Integration with Tuya Smart Home Ecosystem

Permanent User Setting Retention During Power Loss

Smart WiFi Hydronic Floor Heating Thermostat with 7-day 48-period programming

Right side view of hydronic thermostat highlighting easy-to-install wall-mount design

Ultra-slim smart heating thermostat left side view for modern interior design

Home Product Residential Thermostats Hydronic Thermostats

Product Feature

The SAS921WHL is a high-performance underfloor heating controller engineered for maximum efficiency and comfort in your Hydronic Floor Heating system. Its core advantage is the unparalleled flexibility offered by 7-Day 48-Period programming, allowing users to set precise temperature curves to maximize energy savings. Ensuring reliable system operation, this unit provides synchronized Boiler and Valve Control with ±0.5°C accuracy. For floor safety, it features a Triple Control Mode selection, including crucial Floor Temperature Limit protection. The optional WiFi Smart model connects seamlessly to the Tuya Smart platform, enabling effortless Remote App Control and cementing the SAS921WHL's position as a market-leading programmable thermostat.

Key Functions

48-Period Precision Schedule

Maximize Savings with 7-day programmable scheduling.
Synchronized Boiler Valve Control

Simultaneous control of actuator and boiler for system efficiency.
Floor Safety Limit Modes

Protect Your Floor with Room, Floor, and Dual Temperature Limitation.

±0.5°C Control Accuracy

User can recalibrate the displayed temperature for precision.
Tuya Smart WiFi Access

Control Anywhere via Tuya Smart platform and Remote App Control.
Non-Volatile Memory

Permanent retention of all user settings during power loss.

Product Selector

Model No.

Heat/cool

Heat only

Pipe

Passive and linkage output

Programmable

Window card

Room card

External Sensor

Modbus RTU

WIFI

Power

Manual

SAS921WHL-7

√

220VAC

download

SAS921WHL-7W

√

220VAC

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SAS921WHL-7W-WIFI(TY)

√

220VAC

download

Product Parameters

Power source: 100-240VAC 50/60Hz

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

Room temperature setting range: 5℃ to 90℃

Floor temperature control range: 5℃ to 99℃

Accuracy: ±0.5℃

Dimensions: 88mm X 88mm X13mm

Product Application Scenarios

The SAS921WHL is the definitive Hydronic Floor Heating Thermostat for high-end residential and light commercial projects. It is perfectly suited for systems that demand Precise Temperature Control and Floor Temperature Limit protection, including luxury apartments, villas, and commercial spaces utilizing water-based underfloor heating.

luxury apartments

apartments

Residential

Partnership & OEM/ODM Support

As a leading supplier in HVAC automation, we are committed to being a reliable partner for global success, backed by our robust capabilities and resources.

OEM/ODM Ready

Fast Customization and Private Label Support.
Comprehensive Technical Backing

Dedicated R&D team ensures continuous technical consultation and system compatibility.
Global After-Sales Service

Reliable quality assurance and swift support for worldwide market demands.