Heatmiser neoHub G3 Smart Heating Gateway – Third Generation Neo System Hub with HomeKit, Alexa & Google Home

Wired Ethernet — rock-solid reliability

Unlike smart heating hubs that run over Wi-Fi and compete with smartphones, tablets, and streaming devices for bandwidth, the neoHub G3 connects via a dedicated Ethernet port on your router. This eliminates range issues, packet loss, and the interference that plagues 2.4 GHz-only devices — giving consistent, low-latency control regardless of how busy your home network is.

868 MHz mesh network — whole-home coverage

The neoHub G3 communicates with thermostats and devices at 868 MHz — a frequency that penetrates walls and floors far more effectively than 2.4 GHz. Every mains-powered neo device (neoStat, neoPlug) acts as a mesh repeater, relaying signals onward to devices further away. This self-healing mesh architecture means range extends naturally as you add more devices.

NFC pairing — faster device setup

The G3 is the first neoHub generation to include a built-in NFC chip. When adding thermostats or accessories during setup, compatible devices can be paired by holding them near the hub rather than navigating through multiple menu screens. This significantly speeds up multi-device installations, particularly useful for heating engineers commissioning larger systems.

AES-128 encryption — secure by design

All communication between the neoHub G3 and connected neo devices is secured with AES-128 encryption using randomly generated session keys — not fixed credentials. HomeKit connections use Apple's own security layer on top of this. The hub is PSTI compliant and Heatmiser publishes a Statement of Compliance covering the security update support period.

4-week energy history per zone

A key G3 improvement over earlier generations is the expanded history log — 4 weeks of per-zone data accessible in the neoApp. You can review set temperature, pre-heat periods, when heating was active, and daily hours-run for each zone, navigating by calendar or day-by-day. This makes it straightforward to identify wasted heating, verify schedule performance, and demonstrate energy savings.

Smart profiles — manage many zones efficiently

Rather than programming each zone individually, the neoApp lets you create a named heating profile (e.g., "Bedroom schedule" or "Daytime setback") and apply it to multiple zones simultaneously. Changing the profile updates every linked zone at once — invaluable for multi-zone systems with similar schedules, or for property managers running multiple units on a single hub.

Geo-location — heating follows the household

Each user on the system can configure their own leave and return radius in the neoApp. When the last person crosses the leave boundary, heating drops to setback; as the first person approaches the return radius, heating restarts — so the home is warm on arrival. Multiple users are supported, each with their own geo-location settings and access level (guest or admin).

Automatic OTA updates — always current

The neoHub G3 checks for firmware updates automatically and installs them in the background — for the hub itself and for every connected neo device. There is no manual update process and no risk of a device being left on outdated firmware. The first install may prompt a required update; thereafter, all updates are fully automatic and unattended.

neoFlo compatibility — UFH and radiator hybrid

The G3 is the only neoHub generation compatible with the neoFlo smart radiator valve head. Combined with the IMI Heatmiser RF Switch, it enables true room-by-room boiler demand from individual radiators — integrating radiator zones and underfloor heating zones into a single neoApp interface. This makes the G3 the essential hub for any new installation involving neoFlo.

Connect the hub to a spare Ethernet port on your broadband router using the supplied cable. Plug in the power adaptor.

Download the neoApp (iOS or Android) and create your free account. Connect your phone to the same Wi-Fi network as the router.

Add a location — tap the hub's connect button. The Link light turns red when connected to your network, then green when the Heatmiser cloud link is confirmed.

Pair your neo devices — use NFC tap or the in-app pairing flow for each thermostat, sensor, or neoFlo. Name each zone and assign a profile.

Optional: pair to HomeKit — go to Settings → HomeKit & Siri in the neoApp, create or select a Home, and scan the HomeKit code on the back of the hub with your iPhone camera.