WCH Series Radiant Thermostats for Heat Pump Systems

Complete radiant control solutions for residential heat pump projects — supporting underfloor-only systems, underfloor with fan coil integration, and fully coordinated multi-terminal setups with capillary networks. All solutions are engineered for air-to-water heat pumps.
Product Lineup

The SASWELL WCH Series is a dedicated hydronic control platform engineered specifically for modern Air-to-Water Heat Pump systems. Unlike traditional heating-only boiler thermostats, the WCH Series naturally integrates heat pump changeover, UFH + FCU multi-terminal coordination, and predictive dew-point management for radiant cooling.

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Selection Guide

How to Choose Your Radiant Control Architecture?
Your project's terminal configuration determines the optimal control platform. The table below compares the three solutions across key dimensions to help you quickly identify the right architecture for your project.
SASWELL Hydronic underfloor heating control system architecture diagram
Metric / Spec Pure Radiant System
(UFH Only)
Hybrid Radiant + FCU
System
Advanced Radiant
Climate Control System
Terminal Type UFH only UFH + FCU UFH + FCU + capillary
Cooling Performance comfort cooling fast cooling precision climate control
Dew-Point Algorithm
System Complexity low medium high
Installation Cost lower higher highest
Installation Type wired (SAS931WCH) or
wireless (SAS936BWCH)
wired (SAS922BFCH) wired (SAS965FCH)
Typical Project standard homes mixed terminal homes high-performance homes

Pro Tip from SASWELL HVAC Engineers

For temperate climates with moderate cooling loads — such as the UK, Ireland, and Scandinavia — the Pure Radiant System delivers sufficient summer comfort without additional complexity. For projects requiring faster cooling response, higher cooling capacity, or multi-terminal coordination, choose Hybrid or Advanced architecture.
Operating Heating Only, or a Reversible Radiant System?
Heating Only
All models natively support gas boilers, district heating networks, and heat pumps operating in heating mode.
Reversible Systems
For 2-pipe changeover setups, align your summer cooling strategy with the right terminal platform
    ● Gentle Radiant Absorption (Pure Radiant)
    ● Fast Convective Response (Hybrid + FCU)
    ● Precision Micro-Climate Guard (Advanced + Capillary)
Customization & Design Flexibility
Standard Finish
Built for high-volume residential contracts and commercial rough-ins where robust interface clarity and cost efficiency are paramount.
Premium Customization (Available on Advanced Tiers)
Tailored for luxury estates requiring absolute design consistency. Options include modular compatibility with Legrand/Siemens luxury faceplates, custom corporate boot logos, and branded UI color schemes — backed by our 7-day firmware prototyping SLA for verified B2B procurement orders.
Not certain which control architecture applies?
Our engineering team offers complimentary project-specific matching.
英雄卡轮播

System Solutions

Connectivity & Integration

Heat Pump Integration
Compatible with air-to-water heat pumps — supports heating, cooling, and changeover via dry contacts, changeover signals, or Modbus. See our guide on ERP compliant heat pump integration →

Multi-Terminal Coordination
Scales from UFH-only to UFH+FCU and UFH+Capillary layouts, equipped with predictive dew-point logic for Advanced tier solutions. See how seasonal mode switching works in mixed-terminal systems →

Building Management Integration
Modbus RTU communication built into Hybrid and Advanced units to enable centralized zone monitoring, fault diagnostics and unified energy reporting.

Smart Home Connectivity
Optional Wi-Fi and Zigbee modules available on selected models, supporting voice assistant linkage for full residential smart automation.

Global Market Readiness

Market Readiness
Designed for residential HVAC projects across Europe, the Middle East, and emerging heat pump markets — where radiant cooling, heat pump integration, and multi-terminal coordination are increasingly specified in new-build and retrofit developments.
Read a technical deep dive on condensation protection strategies →
Regulatory Compliance
All WCH Series products are CE and RoHS certified, supporting importation and installation across European and international markets with streamlined customs clearance and regulatory acceptance.
Documentation Package
Each system is supported by installation manuals, wiring diagrams, system configuration guides, and integration documentation — provided in bilingual format (English and Chinese) for distributors, system integrators, and on-site engineering teams.
Read about unified control for UFH and FCU systems →
Heating System Control
Get in Touch

Contact our friendly customer service team for any questions, concerns, or suggestions. We'd love to hear from you.


Headquarters Hotline: +86 755 61218391 Headquarters Hotline +86 755 61218391

Headquarters Email: info@saswell.com

MENA Tech Support Hotline: +97155 6743682

MENA Tech Support Email: support@saswell.com

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