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10sqm Twin-wall Panel Underfloor Heating - PP Tacker System
Guide · Underfloor Heating Control · Thermostat · Actuator · Smart Home
Underfloor Heating Control – Thermostat, Actuator & Smart Home 2026
Engo Controls control unit delivered right to your door
5-year warranty · 0.18% complaint rate
GEG § 61 – Room-by-room regulation legally required
Over 1 Million Engo machines sold worldwide
Engo Controls – Underfloor Heating Control System
How underfloor heating controls work – and what do I need?
A complete underfloor heating control system consists of four components: the gateway (network control unit), the room thermostat (temperature measurement and setpoint), the control box / wiring centre (coordinates up to 8 zones), and the thermoelectric actuator (opens and closes the heating circuit at the manifold).
Crucial for underfloor heating is the TPI algorithm (Time Proportional & Integral): Because underfloor heating has a high thermal inertia – the floor heats and cools slowly – an algorithm is needed that anticipates switching cycles. TPI learns the behaviour of the room and prevents overshoot and undershoot, which inevitably occur with simple hysteresis control. The result: up to 30% lower heating costs and consistent comfort.
Underfloor heating systems operate with flow temperatures of 30–35 °C – significantly lower than radiators. This makes them ideal for heat pumps, which operate most efficiently at low flow temperatures.
±0.5 °C
Accuracy of rules
only 2 W
per actuator
up to 8 zones
per rule box
Zigbee 3.0
open mesh protocol
M30 × 1.5
Standard actuator thread
30–35 °C
Flow temperature ideal WP
Who is the smart underfloor heating control for?
Your problem – our solution
Whether it's retrofitting, smart homes, or GEG compliance – the Engo Controls System has the right answer for every underfloor heating system.
Problem
The bathroom, living room, and bedroom are kept at the same temperature – even though each room has different needs. The optimal temperature for the bedroom is 17–19 °C, and for the bathroom, it's 21–25 °C.
Lösung
Room thermostat per zone: Individual weekly program for each room. Each zone heats only when and as much as it really needs – up to 30% savings without loss of comfort.
Problem
Heating runs at full blast even when nobody is home - no way to adjust the temperature via app before returning or to automatically lower it during vacation.
Lösung
Engo WLAN and ZigBee thermostats: App control from anywhere worldwide. Time programs run locally on the gateway – even without an internet connection. Vacation setback at the touch of a button.
Problem
GEG § 61 prescribes individual room control for underfloor heating systems – missing or defective control is no longer permitted in renovations and new builds.
Lösung
Retrofitting with Engo actuators (M30 × 1.5, fits almost all distributors) and room thermostats: GEG-compliant, implementable in one day, no intervention in piping or screed.
Pros & Cons
Advantages & Disadvantages of Smart Underfloor Heating Control
Engo Controls Control System - honestly reviewed.
Benefits
- Up to 30% heating cost savings – investment often pays for itself in one heating season
- GEG Section 61 compliant – zone control for individual rooms legally required
- TPI algorithm specially optimized for UFH inertia – no temperature fluctuations
- Zigbee heating schedules run locally in the gateway – they also work without internet
- 5-year warranty, 0.18% complaint rate, ~90% of cases solvable remotely
- Perfect for heat pumps: 30–35 °C flow temperature = maximum heat pump efficiency
Disadvantages
- ZigBee system requires an EGATE-PRO Gateway (one-time investment ~€60–80)
- Check actuator voltage: 230 V (standard) vs. 24 V (safety extra low voltage, e.g. schools)
- Install the thermostat at a height of ~150 cm, away from heat sources and drafts
- Wi-Fi thermostats dependent on stable 2.4 GHz Wi-Fi throughout the building
Applications
Which projects is the Engo control system suitable for?
From simple retrofitting to fully integrated smart home systems – Engo Controls is suitable for every project.
Heat pump
Optimal30–35 °C flow temperature – underfloor heating + heat pump is the most efficient combination
New construction
OptimalPlan in accordance with GEG § 61 from the start – up to 8 zones with an ECB8-230
Inventory reduction
OptimalE30NC-230 actuator plugged onto M30 × 1.5 manifold – no chiselling required
Holiday apartment
OptimalApp access worldwide: Preheating before arrival, lowering during vacancy
Apartment building
GeeignetECB8-230 per dwelling unit: 8 zones, up to 50 actuators
Bathroom / Wet Room
GeeignetOwn zone with 21–25 °C – independent of the rest of the house
School / Kindergarten
Geeignet24 V Safety Voltage: ECB8-24 + EASY-24 + E30NC-24 – specially for public buildings
Smart Home
OptimalZigBee 3.0 Mesh + Tuya/Smart Life: Compatible with Google Home, Alexa, Philips Hue & Co.
Optimal
Geeignet
Bedingt
Nicht geeignet
Prices & Costs
What does underfloor heating control cost?
Price Overview Engo Controls Control Components – without Installation Effort.
25 – 450 €
per zone
Simple wired (EASY-230): ~€43 (thermostat €25 + actuator E30NC-230 €18). Wi-Fi zone (E10 + E30NC): ~€90–110. ZigBee 4-zone system (4× EONE + ECB62-ZB + EGATE-PRO): ~€320–450. Payback period: often within one heating season with 30% heating cost savings.
Lower the price
- Wired Thermostat (EASY-230): from €25 – DIY installation in 30 min
- Retrofitting without interfering with pipework or screed
- ZigBee Mesh: one gateway for all zones – no router needed per room
Increases the price
- Number of heating zones – one thermostat per zone (€25–120) + actuator (from €18)
- EGATE-PRO Gateway for ZigBee systems (one-time fee of ~€60–80)
- Electricians for flush-mounted thermostats or new 3 × 0.75 mm² cables
- ECB8-230 Control Box for more than 2 independent heating circuits (€120–180)
Prices are based on current MC Therm list prices (2026). Details in the guide.
Standards & Regulations
Standards & Legal Requirements
GEG Section 61
Building Energy Act 2024
Room-by-room individual room control is legally required for underfloor heating systems – this applies to new buildings and existing buildings undergoing significant renovation.
EN ISO 11855
Surface Heating & Cooling
Governs the design, calculation, and operation of radiant heating systems – including requirements for control and hydraulic balancing.
Zigbee 3.0
IEEE 802.15.4 Standard
Open radio standard with mesh network. Interoperable with other ZigBee 3.0 devices (Hue, Homematic IP, etc.). Automations run locally – even without internet.
CE / IP54
EU conformity & protection class
All Engo actuators: IP54, protection class II - splash-proof. Thermostats IP30. All products with EU Declaration of Conformity and USB-C compliant with EU Directive 2024.
GEG (German Buildings Energy Act) § 61 requires room-by-room individual room control for underfloor heating. All Engo Controls thermostats and actuators meet this requirement, are CE-certified, and IP54-protected. The ZigBee 3.0 protocol is an open standard – compatible with other smart home systems and operable independently of the manufacturer.
Guides & Knowledge
All Control Guides
All guidesThermostat Comparison, Smart Home, Retrofitting & Actuators – the Complete Guide.
Comparison · 8 min
Underfloor Heating Thermostat: Comparison & Buying Guide 2026
EASY vs. E10 vs. EONE: Wired, WLAN or ZigBee – All Types Compared with Costs & Recommendation.
Jetzt lesen → Smart Home · 7 minSmart Home Underfloor Heating: ZigBee, Wi-Fi & App Control
ZigBee 3.0 Mesh vs. WLAN: Offline Operation, Range, Gateway – Which Protocol Suits Your System?
Jetzt lesen → Instructions · 9 minRetrofitting Underfloor Heating Controls: Step-by-Step
Screw on the M30 × 1.5 actuator, mount the thermostat at 150 cm, set up the app – without an electrician in 2–4 hours.
Jetzt lesen → Heat pump · 13 minutesUnderfloor Heating Heat Pump Control: Maximize COP with Engo
Flow temperature 30–35 °C, TPI algorithm & ZigBee time programs: This is how you get the most out of your HP + UFH.
Jetzt lesen → Law · 6 minGEG § 61 Individual Room Control: Obligation, Deadlines & Cost-Effective Retrofitting
Mandatory from 2024: Every room with underfloor heating requires individual room control. What it costs and how it works.
Jetzt lesen → Fundamentals · 7 minsIndividual room control underfloor heating: Thermostat, actuator & control box
How thermostats, actuators and control terminal strips interact – System overview with wiring diagram and costs.
Jetzt lesen → Technology · 5 minUnderfloor Heating Actuator: NC vs. NO, 24V vs. 230V & M30×1.5
NC or NO? 24V or 230V? Which actuator fits your manifold - Engo E30NC-230 explained.
Jetzt lesen → Model comparison · 9 min.ENGO Thermostat Comparison: ESimple, Easy, E55, E20i & EONE in Detail
All 6 ENGO Models Directly Compared – Prices starting at €15, Installation Type, Control Accuracy, and Which Thermostat is Truly Worthwhile for Your UFH.
Jetzt lesen →Does it fit?
The complete underfloor heating system
For a functional system, in addition to the control unit, you also need distributors, an installation system, and heating pipes.
Duty
Underfloor heating manifold technology
Manifold with M30 x 1.5 connections – basis for room-by-room control with Engo actuators.
Recommended
Underfloor Heating Installation System
Tacker system, hook-and-loop system, thin-layer system or dry construction – the suitable installation system for control.
Recommended
heating pipe
PE-RT heating pipe – optimum matching to flow temperature 30–35 °C and control concept.
Frequently Asked Questions
FAQ Underfloor Heating Control
The room thermostat measures the room temperature and emits an electrical signal when heating is required. The thermoelectric actuator (e.g., Engo E30NC-230) is located on the heating circuit distributor and opens or closes the heating circuit in response to this signal. Together, these two components form the room-by-room individual room control according to GEG § 61. Important: NC (normally closed) type actuators open when energized – this is the safe standard, as no water is lost in the event of a power outage.
Underfloor heating systems have high thermal inertia – the floor heats up and cools down slowly. A simple hysteresis control (on/off at ±0.5 °C) leads to overshoot: the UFH heats up too far above the setpoint, switches off, and cools down too far below it – a continuous up-and-down cycle. The TPI algorithm (Time Proportional & Integral) learns the room's behavior and adjusts the switching times to maintain a stable temperature. Result: comfort without fluctuations and up to 30% less energy consumption.
ZigBee 3.0 forms a mesh network: Every mains-powered device amplifies the signal. Heating schedules are stored locally in the gateway and continue to run even if the internet fails. Energy-saving, ideal for many zones. Requires EGATE-PRO Gateway (~€60–80). Wi-Fi: Direct connection to the router, no gateway, immediately usable in the app – but dependent on stable 2.4 GHz Wi-Fi. Engo's recommendation: ZigBee for 3 zones or more, Wi-Fi for 1–2 zones. Minimum distance between router and gateway: 1 m (both use 2.4 GHz).
Yes - for the basic case without rewiring. Actuators are simply plugged onto the existing distributor (M30 × 1.5 thread, European standard). Thermostats replace the old ones on the wall - the flush-mounted box is usually already present. Check cable dimension: For 230 V thermostats, at least 3 × 0.75 mm² (do not use network cable!). Install at approx. 150 cm height, away from heat sources and direct sunlight. Total duration: 2–4 hours depending on the number of zones.
According to Engo Controls and medical recommendations: Living room / Home office: ~20 °C, Kitchen: ~19 °C (further heated by cooking), Bathroom: 21–25 °C (only during use), Bedroom: 17–19 °C (a cooler bedroom promotes restful sleep). Anyone who heats all rooms to 22 °C heats the bedroom 3–5 °C too much – a smart zone control makes the biggest difference here.
Simple (1 zone, wired): EASY-230 thermostat (~€25) + E30NC-230 actuator (~€18) = ~€43. WLAN (1 zone): E10 thermostat (~€55) + actuator = ~€73. Smart ZigBee 4 zones: 4× EONE-230 (~€60 each) + ECB62-ZB control box (~€150) + EGATE-PRO gateway (~€70) = ~€460. The investment often pays for itself within one heating season with a 30% heating cost saving.
Customer Testimonials
What Our Customers Say
Verified reviews from customers who use Engo Controls control products.
For your investment
Configure underfloor heating control now
Engo Controls Thermostats, Actuators and Control Boxes – coordinated, directly from MC Therm. Over 1 million devices sold. 5-year warranty.
5-year warranty · 0.18% complaint rate
GEG Section 61 compliant
Up to 30% heating cost savings