ENGO Thermostat Comparison 2026: ESimple, Easy, E55 & EONE

ENGO Thermostat Comparison 2026: ESimple, Easy, E55, E20i, EONE — Which Model is Right for You?

ENGO Controls offers six thermostat models for underfloor heating — from €15.06 (ESimple-230) to €73.29 (E20i WiFi). This guide directly compares all models: technical specifications, installation type, control accuracy, smart home integration, and system costs for 1 to 8 zones. With concrete recommendations: Which ENGO thermostat is worthwhile for which situation — and when is the surcharge for ZigBee justified?

⏱ 9 min read

6 models directly compared starting at €15

System costs calculated for 1–4 zones

What you should clarify before choosing a model

Checklist: These are the points that determine the right model

→Determine the number of heating circuits — each room with its own heating circuit requires its own thermostat and actuator
→Check voltage: 230V (standard for living areas) or 24V safety voltage (bathrooms, wet rooms)
→Clarify mounting location: Is a flush-mounted switch box available (for E55/EONE) or is surface mounting preferred (ESimple/Easy)?
→Check Wi-Fi coverage: Is a 2.4 GHz signal available at the thermostat location? For ZigBee: EGATE-PRO max. 1 m from the router
→Smart Home available? Alexa and Google Home: all Wi-Fi and ZigBee models. Apple HomeKit: not natively supported (Homebridge required)

The 6 ENGO Thermostat Models: Comparison & Decision Guide

Which model for whom? — Quick Decision

→1 room, no smart home, budget under €30: Easy-230 (€24.90) — weekly program, display, no router.
→App remote access, 1–2 rooms, no gateway: E55 WiFi (€48.69) — direct Wi-Fi connection, Alexa & Google Home.
→3+ rooms, offline operation, multi-zone system: EONE-230V ZigBee (€64.09) + EGATE-PRO (€61.81, one-time).
→Retrofit without new control line: EONE-BAT ZigBee (€67.59) or E20i WiFi (€73.29).
→Basic function only, no display: ESimple-230 (€15.06) — rotary knob, surface-mounted.
→Heat pump, maximum efficiency: EONE-230V ZigBee — TPI ±0.1 °C, stable offline.

Compose thermostat, control box and actuators directly – suitable for your underfloor heating.

To the Configurator →

ESimple-230 — Rotary knob for basic needs (€15.06)WiredNo display, no weekly program — just a rotary knob (5–30 °C). Surface mounting (80×80 mm), TPI or hysteresis (±0.5 °C), IP30. Useful in rental apartments and storage rooms where a fixed temperature is sufficient. No router, no cloud account, no update risk.

Easy-230 — Programmability for little money (€24.90)WiredDisplay with actual/set temperature, 7-day weekly program, heating profiles (comfort, eco, frost protection). Surface-mounted, wired, 230V, power failure-proof time programs. The first choice for underfloor heating without smart home requirements in living spaces.

E55 WiFi — WLAN for individual rooms (€48.69)WiFiFlush-mounted (55×55 mm, standard switch boxes), touch display, 2.4 GHz WLAN, Tuya. Worldwide app control, Alexa/Google Home. TPI ±0.2–2 °C, 5–45 °C. No gateway needed. If the router fails, time programs pause — local operation remains possible.

Compose the ZigBee models EONE-230V and EONE-BAT directly as a complete package with gateway in the configurator.

To the Configurator →

E20i WiFi — Wireless retrofit (€73.29)WiFiBattery-powered transmitter (freely placeable in the room) + wired receiver at the manifold. No control line required — ideal for renovations in old buildings where cables cannot be re-pulled.

EONE-230V ZigBee — Professional model for multi-zone systems (€64.09)ZigBeeZigBee 3.0 Mesh, flush-mounted (Ø 60 mm), 90×90 mm, TPI ±0.1–2 °C, 5–45 °C. Tuya, Alexa, Google Home. Time programs stored locally in the EGATE-PRO — continue to run if the internet fails. Requires EGATE-PRO Gateway (€61.81 once per apartment).

EONE-BAT ZigBee — Completely wireless (€67.59)ZigBeeIdentical ZigBee 3.0 functions as EONE-230V, battery-powered — no 230V control line required. Acts as a ZigBee mesh router and extends the range of other devices. Battery life approx. 1.5–2 years. Also requires EGATE-PRO.

ThermostatsSystem AccessoriesSystem Examples

Model	Protocol & Installation	Price
ESimple-230 Wired	Wired, surface-mounted 80×80 mm	€15.06
Easy-230 Wired	Wired, surface-mounted, display + weekly program	€24.90
E55 WiFi WiFi	WLAN 2.4 GHz, flush-mounted 55×55 mm, no gateway	€48.69
E20i WiFi WiFi	WLAN, wireless transmitter + receiver	€73.29
EONE-230V ZigBee	ZigBee 3.0 Mesh, flush-mounted Ø60 mm, offline-capable	€64.09
EONE-BAT ZigBee	ZigBee 3.0, battery-powered, wireless	€67.59

Product	Function	Price
E30NC-230 Actuator	NC type, M30×1.5, required per heating circuit	€9.50/pc
ECB8-230V Control Box	8 zones, wired, for Easy/ESimple	€54.43
ECB62-ZB Control Box ZigBee	8 zones, ZigBee 3.0, for EONE systems	€95.43
EGATE-PRO Gateway ZigBee	ZigBee central unit, 1× per apartment, local storage	€61.81

System	Includes	Total
1 Zone Wired	ESimple-230 + E30NC	from €24.56
1 Zone WiFi	E55 + E30NC	from €58.19
1 Zone ZigBee	EONE-230V + EGATE-PRO + E30NC	from €135.40
4 Zones Wired	4× Easy + ECB8-230V + 4× E30NC	approx. €193
4 Zones ZigBee	4× EONE-230V + ECB62-ZB + EGATE-PRO + 4× E30NC	approx. €451

Frequently Asked Questions about ENGO Thermostats for Underfloor Heating

Depends on your situation: 1 room without Smart Home → Easy-230 (€24.90) – Weekly program, display, no router. App control, 1–2 rooms → E55 WiFi (€48.69) – No gateway needed. 3+ rooms, offline operation → EONE-230V ZigBee (€64.09) + EGATE-PRO (€61.81): Timed programs continue to run locally, even with internet outage. Retrofit without pulling cables → EONE-BAT (€67.59, battery-powered) or E20i WiFi (€73.29). Basic temperature only, no display → ESimple-230 (€15.06). Heat pump → EONE-230V: TPI ±0.1 °C maintains stable low-temperature operation without overshoot.

The ESimple-230 (€15.06) has no screen – just a rotary knob for the setpoint (5–30 °C) and an LED status indicator. No weekly program is possible. The Easy-230 (€24.90) has a display showing actual and set temperatures, time, and operating mode. It supports multiple heating profiles (e.g., Comfort, Eco, and Frost Protection) and a 7-day weekly program. For almost all underfloor heating applications, the additional €9.84 for the Easy-230 is worthwhile.

For 1-2 rooms without an existing ZigBee infrastructure: E55 WiFi — no gateway investment needed, direct router connection. For 3+ rooms or if offline operation is important: EONE-230V ZigBee. The EGATE-PRO stores all time programs locally; if the internet or router fails, the heating continues according to the program. ZigBee Mesh also reliably bridges thicker walls better than individual Wi-Fi connections. Control accuracy: EONE ±0.1–2 °C vs. E55 ±0.2–2 °C (both TPI).

Yes. The EONE-230V communicates via ZigBee 3.0 — for app control, time programs, and Alexa/Google Home integration, the EGATE-PRO Gateway (€61.81) is required, which translates the ZigBee network into your home network. The gateway is only needed once per apartment/house, regardless of how many EONE thermostats are installed. Without the gateway, the EONE-230V can only be operated manually.

4× EONE-230V (€256.36) + ECB62-ZB (€95.43) + EGATE-PRO (€61.81) + 4× E30NC-230 Actuator (€38) = approx. €451. For comparison: 4-zone wired with Easy-230: 4× Easy (€99.60) + ECB8-230V (€54.43) + 4× E30NC (€38) = approx. €192. According to Engo, the ZigBee surcharge of approx. €260 pays for itself in one heating season through up to 30% energy savings due to precise TPI control and time programs.

Yes. The E20i consists of two components: a battery-operated transmitter (wall thermostat) and a receiver, which is wired to the actuator or manifold. The transmitter sends control signals wirelessly, and the receiver executes the switching commands. This completely eliminates the need for a new control line between the thermostat and the manifold — ideal for retrofitting in old buildings where lines cannot be re-routed.

Not natively. ENGO thermostats use the Tuya platform for Wi-Fi models (E55, E20i) and the EGATE-PRO for ZigBee models (EONE). Apple HomeKit is not directly supported. However, Tuya devices can be integrated into HomeKit using the open-source solution Homebridge (Raspberry Pi or other home server). For direct HomeKit support without Homebridge, a different manufacturer (e.g., Netatmo, Tado) would be required.

Yes. Heat pumps operate most efficiently at stable, low flow temperatures (30–35 °C). The TPI algorithm of the EONE-230V regulates with ±0.1 °C accuracy — no overshoot, no unnecessary reheating boost of the HP. The ZigBee time program in the EGATE-PRO runs locally: zone-wise night and absence setbacks work even without internet, which is not guaranteed with WLAN thermostats. According to Engo, the EONE surcharge typically amortizes over a simple Easy-230 within one heating season due to higher HP efficiency.

Yes. ZigBee models (EONE-230V and EONE-BAT) share the same EGATE-PRO and are managed together in the Tuya/Smart Life app. WLAN models (E55, E20i) run independently via the router — also controllable in the same app. Example: Living room EONE-230V (flush-mounted, ZigBee), bathroom EONE-BAT (battery-powered, no cable), kitchen Easy-230 (wired, no app needed). The only limitation: WLAN and ZigBee devices do not share a common time schedule — these must be managed separately.

Easy-230 (€24.90). No Wi-Fi router dependency, no cloud account, no app updates that tenants ignore. The weekly program can be set directly on the device, is saved securely against power outages, and continues to run when the apartment is vacant. GEG § 61 is fulfilled. Anyone requiring remote access to a holiday home should instead choose the E55 WiFi — app control from anywhere, but: the router must run continuously and the Wi-Fi password must not change.