Boiler Thermostat Manufacturer | OEM/ODM Smart Heating Controls

Leading Boiler Thermostat Manufacturer & OEM/ODM Strategic Partner

As a global pioneer with over 20 years of expertise in HVAC control technology, Saswell serves as an "Innovation Accelerator" for boiler manufacturers, global distributors, and system integrators. We provide scalable, future-proof control ecosystems and serve as a trusted supply chain partner tailored to your brand’s specific requirements.

Hot Products

From traditional wired dry-contact controllers to cutting-edge OpenTherm, Zigbee, and Matter compatible devices, our product range ensures seamless integration with global boiler brands including Worcester Bosch, Vaillant, Ideal, Baxi, and many more. Saswell has the engineering depth to support your professional market growth.

IoT Connectivity Decision Guide: Wi-Fi vs. Zigbee vs. Matter

Technical Specs	Wi-Fi (2.4GHz)	Zigbee 3.0	Matter (Over Thread/Wi-Fi)
Gateway	No Gateway Needed	Requires Zigbee Hub	Requires Border Router
Power	High (Wired/Frequent Bat.)	Ultra-Low (2yr+ Battery)	Low (Thread Optimized)
Reliability	Depends on Router	Local Link (Offline)	High (Local Control)
Networking	Limited (~20 devices)	Super Mesh (100+ devices)	Self-healing Mesh
Ecosystem	Brand-specific App	Gateway Dependent	Native Apple/Google/Alexa

Which One Fits Your Business?

● Wi-Fi: The top choice for mass-market consumers due to its "Plug-and-Play" nature.

● For Integrators: Zigbee 3.0 is the industry standard. Its Local Automation ensures heating remains functional even during internet outages.

● For Innovation Leaders: Matter represents the future, offering users ultimate freedom without proprietary app limitations.

Control Logic Decision Guide: Standard vs. OpenTherm

Protocol Type	Control Logic	Core Advantage
Standard (On/Off)	Relay Switching	Universal compatibility for all dry-contact boilers
OpenTherm (OT)	Modulating Control	Deep energy saving; reduces boiler cycling

Standard On/Off Guide

Simple logic, similar to a light switch. The boiler runs at full power until the set point is reached, then shuts down. This leads to water temperature fluctuations.

OpenTherm (OT) Guide

A sophisticated "two-way conversation" to adjust flame size in real-time. As the room reaches target temperature, the flame lowers, keeping the boiler in its most efficient zone.

B2B Value

OpenTherm extends boiler lifespan, improves gas efficiency by 5%-15%, and meets Boiler Plus requirements for modern heating systems.

Core Technical Functions

Open Window Detection

Automatically enters energy-saving mode during sudden temperature drops to prevent energy waste.
Flexible Programming

Supports 7-day, 5+2, or 24h cycles with 6 daily time/temperature periods for personalized comfort.
Anti-frost Protection

Triggers the boiler if ambient temperature falls below 5°C to prevent pipes from freezing and bursting.

SAS936 dual-channel smart thermostat managing indoor heating and domestic hot water systems simultaneously.

Specialized for UK Market

Dual Channel Controllers: Specifically designed for UK S-Plan and Y-Plan systems. Independently manage your Central Heating (CH) and Domestic Hot Water (DHW) through a single device—the perfect digital upgrade for traditional mechanical programmers.

Professional OEM/ODM Services

White Labeling

●Comprehensive private label services including custom UI/UX design and exclusive housing/mold development.
Hardware Customization

●Support for tailored RF frequencies (868MHz/433MHz) and specialized relay configurations (Volt-free/Dry Contact).
Compliance Assurance

●All products are manufactured to ErP Class IV/V standards and carry CE/UKCA certifications.

FAQ

Zigbee 3.0 supports Local Link (Offline Automation). Unlike Wi-Fi, which depends on the cloud, Zigbee thermostats and receivers communicate directly. If the internet goes down, the heating system stays functional—a critical reliability requirement for HVAC professionals.

Yes. OpenTherm allows for Load Compensation by enabling two-way communication with the boiler. It modulates the boiler’s flame size rather than simple on/off cycles, reducing gas consumption by 5%-15% and extending the boiler's lifespan.

Absolutely. Our OpenTherm and smart series feature TPI algorithms and modulating logic that fully meet and exceed Boiler Plus requirements. We are the ideal partner for distributors looking for compliant energy-saving solutions.

Yes. We provide "Boiler Agnostic" solutions. By using Volt-free (Dry Contact) or OpenTherm connections, our thermostats can interface with almost any global boiler brand, offering a high-performance upgrade without proprietary limitations.

As a dedicated OEM/ODM manufacturer, we offer full-spectrum customization: from UI/UX design and housing molds to proprietary RF protocol adjustments. We help brands launch unique, certified products to market faster.

Leading Boiler Thermostat Manufacturer & OEM/ODM Strategic Partner

Hot Products

Mechanical knob wireless thermostat

Mechanical knob wireless thermostat

Boiler Thermostat

Wireless Boiler Thermostat kit

IoT Connectivity Decision Guide: Wi-Fi vs. Zigbee vs. Matter

Control Logic Decision Guide: Standard vs. OpenTherm

FAQ

Why choose Zigbee 3.0 over Wi-Fi for professional heating projects?

Does OpenTherm (OT) really save more energy than Standard On/Off controls?

Are Saswell controls compliant with the UK Boiler Plus legislation?

Can Saswell wireless thermostats replace original controllers like Vaillant VRT or Bosch Wave?

What is Saswell's capability for Private Label (White Label) services?