Underfloor heating individual room control: Thermostat, actuator, control box

Underfloor Heating Individual Room Control: Thermostat, Actuator & Control Box Explained

What exactly is individual room control and what three components are needed? This guide explains the principle (thermostat → control box → actuator), shows the difference between wired, WiFi, and ZigBee systems, lists all costs for 2026, and clarifies who is obligated to retrofit according to GEG § 61. Includes price table and purchase recommendation.

⏱ 10 min read time

from €34 per zone

Compliant with GEG Section 61

What you need for individual room control

The 3 Components

→Thermostat – one device per heated room; wired Easy-230 from €24.90 or ZigBee EONE-230V from €64.09
→Actuator E30NC-230 – one per heating circuit on the manifold (€9.50, thread M30×1.5, 230V NC-type)
→Control box ECB8-230V – controls up to 8 zones, located at the distribution box (€54.43)
→For ZigBee: EGATE-PRO Gateway – once per household, all thermostats via app (€61.81)

Check prerequisites at the distributor

→Underfloor heating with heating manifold available (screed box or wall box accessible)
→Check voltage at the distributor: 230V living areas (standard), 24V wet rooms – Actuators must match
→Determine the number of heating circuits – one actuator and one thermostat required per zone
→Clarify cable route from thermostat mounting location to distribution box (necessary for wired systems)

How do wired, WiFi, and ZigBee systems differ?

Wired thermostats (Easy-230, ESimple) communicate with the control box via a 2-wire cable — reliable, inexpensive, 100% offline. WiFi thermostats connect directly to the home router and a cloud app (Tuya) via 2.4 GHz WiFi — no gateway needed, but cloud dependence for app functions. ZigBee thermostats (EONE) form a self-healing mesh network to the EGATE-PRO Gateway — highest reliability and offline security, but a one-time gateway investment.

The Control Loop Principle: Thermostat → Control Box → Actuator

System Overview: 1 Zone = 3 Components

ThermostatMeasure room temperature
Compare setpoint
Signal to control box

Signal

Control BoxECB8-230V / ECB62-ZB
1 per apartment
up to 8 zones

230V Output

ActuatorE30NC-230
1 per heating circuit
opens valve

Heating water

Heating CircuitUnderfloor pipe
heats the room

Each zone regulates itself independently — bedroom to 18 °C, living room to 22 °C, children's room to 21 °C. Simultaneously, independently of each other.

How many thermostats do I need?

Rule of thumb: 1 thermostat = 1 zone = at least 1 heating circuit. Multiple heating circuits in a room can be connected to a common thermostat if they form a thermal unit:

Example	Heating Circuits	Thermostats	Control Boxes
3-room apartment	3–5 circuits	3 (1 per room)	1 × ECB8-230V
4-room + bathroom	5–7 circuits	4–5	1 × ECB8-230V
Single-family house 6 rooms	8–12 circuits	6	1 × ECB8-230V (8-zone)
Single-family house > 8 rooms	12–20 circuits	8–10	2 × ECB8-230V or 1 × ECB62-ZB

⚠ Why a central thermostat is not enough: With central control (one thermostat in the hallway), the underfloor heating runs until the hallway reaches the set temperature — bedrooms and south-facing rooms overheat. GEG § 61 prescribes room-by-room control.

Individual Room Control & Heat Pump: Particularly Important

✓ For heat pumps, individual room control is doubly valuable: When rooms reach the set temperature, actuators close the heating circuits. The heat pump recognizes the reduced volumetric flow and reduces power — this improves the COP and protects the pump from short cycling. Without individual room control, the heat pump runs inefficiently at full power.

How individual room control works: the control loop principle

Step 1: Thermostat measures room temperature and signals demand: Each thermostat is located in the room it is meant to control – at a wall height of approx. 1.5 m, not behind curtains, and not above radiators. It continuously compares the actual and target temperatures. If the room temperature falls below the target value, it sends a heating signal to the control box.

Step 2: Control box coordinates all zones simultaneously: The control box (ECB8-230V for up to 8 zones) is located at the heating circuit distributor and receives signals from all thermostats. Each zone is evaluated separately: Room 1 requires heat → Zone 1 opens; Room 2 is warm enough → Zone 2 remains closed. All rooms are controlled in parallel and independently of each other.

Step 3: Actuator opens or closes the heating circuit: The E30NC-230 actuator is mounted on the valve of the heating circuit distributor. NC = Normally Closed: closed without power (heating circuit cold), open with power (heating water flows). If the power fails, all circuits close automatically – a safety standard for underfloor heating systems.

Step 4: Underfloor heating heats to the exact target temperature: Once the heating circuit is open, heating water flows into the floor of the room. The floor temperature rises, the thermostat registers the air heating and closes the heating circuit again when the set temperature is reached. Result: room-specific control with deviations below ±0.5 °C – no overheating, no underheating.

Cost of individual room control for underfloor heating 2026

Component	Price
Actuator E30NC-230 (per zone)	€9.50
Wired Thermostat Easy-230 (per room)	€24.90
Wired control box ECB8-230V (up to 8 zones)	€54.43
4-zone wired complete	approx. €192
Thermostat ZigBee EONE-230V (per room)	€64.09
ZigBee Control Box ECB62-ZB (up to 8 zones)	€95.43
EGATE-PRO Gateway (one-time per household)	€61.81
4-zone ZigBee complete	approx. €380–450

Frequently Asked Questions about Individual Room Control

Not necessarily for every heating circuit, but for every controlled area (zone). A large living room can have multiple heating circuits, all controlled by one thermostat. Rule of thumb: one thermostat per room, one actuator per heating circuit.

A heating circuit is a single pipe loop in the floor (max. 100 m). A zone is a control area, usually a room. A room can contain several heating circuits, but these are all controlled jointly by a thermostat and a control box output stage.

No – wired and ZigBee thermostats use different control boxes (ECB8-230V vs. ECB62-ZB). Within a manifold, you should choose a uniform system. Different manifolds (e.g., ground floor and upper floor) can use different systems.

Yes – ZigBee 3.0 runs locally in the mesh network. The EGATE-PRO Gateway stores all heating schedules. In case of internet failure, all thermostats continue to heat normally according to the schedule. Only app control from outside the home network is not possible without internet.

Yes, significantly. Heat pumps operate most efficiently with low flow temperatures and constant run times. Without individual room control, rooms overheat and force the heat pump to higher flow temperatures. ZigBee thermostats with a TPI algorithm keep all rooms within ±0.5 °C and measurably increase COP efficiency – often 15–25% less power consumption.

Mounting the actuators (screw-on, M30×1.5) and thermostats is suitable for DIY enthusiasts. The 230V mains connection of the control box should be carried out by an electrician for fixed installations. Plug-operated variants (extension cables) can be fully assembled by DIYers. Time required: approx. 2–4 hours for 4 zones.

Yes — a room-by-room upgrade is easily possible. The EGATE-PRO Gateway and the ECB62-ZB ZigBee control box are installed once. Afterwards, individual rooms can be successively upgraded from wired Easy-230 thermostats to EONE-230V. Wired and ZigBee thermostats run in parallel on different control boxes.

Thermostats, Actuators & Control Boxes

Thermoelektrischer Stellantrieb Engo E30NC - 230 für Fußbodenheizung - MC Therm Shop

Auf Lager MC THERM

★★★★★ 5.0(6)

Thermoelectric actuator Engo E30NC-230 for underfloor heating

Actuator

EONE-230V – Smart ZigBee Room Thermostat

thermostat

Control terminal strip ECB8-230 V wired 8 zones

Control terminal block

ZigBee control terminal block 8 zones ECB62-ZB

Control terminal block

€95,43

Zum Produkt →

All components for individual room control – E30NC-230 actuators (€9.50), wired thermostats from €24.90, and ZigBee systems from €64 – individually or as a configured set.

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