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Heatmiser neoFlo Smart Radiator Thermostat
The IMI Heatmiser neoFlo is an advanced smart thermostatic radiator control designed to deliver precise room-by-room heating management across radiator systems. Ideal for modern smart heating upgrades, neoFlo allows homeowners and installers to improve comfort, efficiency, and control while integrating seamlessly with existing Heatmiser systems, including wet underfloor heating installations.
Designed for both retrofit and new heating projects, neoFlo provides intelligent radiator zoning with quiet operation, accurate temperature management, and optional app connectivity through the Heatmiser neo ecosystem.
The neoFlo smart radiator thermostat is suitable for domestic heating systems using thermostatic radiator valves. It is ideal for:
neoFlo can operate as a standalone smart radiator controller for localised temperature management or as part of a wider connected system when paired with Heatmiser neoHub G3 and RF Switch components.
The unit is designed to fit most modern thermostatic radiator valves using a standard M30 connection and includes compatibility support for additional valve types using adaptors where required.
In properties using both radiators and wet underfloor heating, neoFlo plays an important role in creating a fully integrated smart heating system. It allows radiator-heated rooms to be managed within the same Heatmiser neo environment as underfloor heating zones, helping deliver consistent comfort and improved heating efficiency throughout the property.
By enabling independent room-by-room temperature control, neoFlo helps reduce unnecessary heating demand, improve zoning performance, and support lower running costs. When combined with neoHub G3 and RF Switch, the system can also participate in intelligent call-for-heat functionality, allowing the wider heating system to respond dynamically to room requirements.
neoFlo is designed for straightforward installation onto compatible thermostatic radiator valves. For app control, scheduling, and remote access, pairing with neoHub G3 is required.
Where boiler communication or call-for-heat functionality is required, installation of the RF Switch should be completed by a suitably qualified heating or electrical professional.
For best performance within smart zoning systems, neoFlo should be configured as part of a correctly balanced heating system.
For setups where neoFlo needs to do more than control the radiator, the full heating solution uses neoFlo + neoHub G3 + RF Switch. In this setup, neoFlo can help enable the heating system to fire when rooms call for heat, while neoHub G3 provides app control, remote access and scheduling.
The RF Switch is the key part of this setup. It receives the signal and must then be wired to the boiler or other heat source output so the system can respond correctly when heat is needed.
Installer note: Where RF Switch is used to call for heat, it must be wired to the boiler or other heat source by a suitably qualified installer.
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Smart home compatibility
When paired with neoHub G3, neoFlo can form part of a broader connected home experience, helping bring radiator control into the wider neo ecosystem and compatible smart-home platforms.
This gives homeowners a convenient way to combine room-by-room radiator control with app access, routines and familiar smart-home integrations.
System functionality
neoFlo can be used on its own for local radiator control, paired with neoHub G3 for smarter app-based features, or combined with RF Switch where the system needs to call for heat.
neoFlo can operate independently without neoHub, providing essential heating control right from installation. The only requirement is calibrating the radiator valve, allowing a quick and simple setup without relying on network availability.
Users can manually adjust room temperature by pressing the button to activate the display, then turning the wheel to select the desired setpoint. The chosen temperature remains active until changed again or overridden by another mode.
If the room temperature drops sharply (>2°C in 2 minutes), neoFlo closes the valve for 30 minutes to help prevent unnecessary heating. After that, it returns to the previous mode. Settings can be adjusted via the neoApp when paired.
Up to four daily heating periods with different temperatures can be set directly on neoFlo, helping reduce energy use before connecting to neoHub for more advanced scheduling.
Boost mode fully opens the valve for 30 minutes to warm the room quickly. A countdown appears on the display, and the system then returns to the previous schedule or mode.
If room temperature drops below 5°C, neoFlo automatically opens the valve to help protect against freezing pipes.
neoFlo runs an automatic valve exercise cycle once a month to help prevent limescale build-up and maintain performance.
A low battery icon appears when replacement is needed. Thanks to hybrid technology, battery life is designed to last around five to six years.
Connecting neoFlo to the neoApp via neoHub G3 enables full remote control and access to advanced settings. Users can adjust temperatures through the app or directly on neoFlo, with synchronisation between the two.
neoFlo follows a heating profile based on predefined schedules. These can be modified through the neoApp, with manual temperature changes remaining active until the next scheduled change.
Set Holiday Mode through the neoApp to switch devices to frost protection until a specified return date. Heating can still be temporarily activated if required.
neoFlo can help improve heat distribution by adjusting flow to help prevent uneven heating. For more advanced balancing performance, IMI Heimeier valve solutions can also be used.
Need fast heating? Boost Mode fully opens the valve for 30 minutes, then returns to the previous mode automatically.
Set a temporary temperature outside the normal schedule for a chosen duration. Once the hold period ends, neoFlo returns to the previous schedule.
The neoApp allows the sensitivity and duration of open-window detection to be adjusted.
With Pre-Heat mode, neoFlo starts heating before the scheduled time so the target temperature is reached when needed.
neoFlo measures temperature at the radiator, so a room offset of ±5K can be applied in the neoApp to fine-tune comfort.
Once paired with neoHub G3, neoFlo can check for software updates and install them in the background.
RF Switch is the component that allows neoFlo to become part of a setup that can call for heat. It acts as a wireless receiver and can trigger the boiler, zone valve or other heat-source output when rooms need heating.
Heatmiser RF Switch v2
2
1
Surface
3A resistive
9A resistive
230V AC
108 x 90 x 24mm
Choose your setup
Start with neoFlo, then add the components needed for connected control and call-for-heat. neoFlo, neoHub G3 and RF-SWITCH are sold on separate product pages, so add each required item to your basket individually.
Room control
The smart radiator thermostat at the heart of your room-by-room heating setup.
Connected control
Add the hub to connect neoFlo to the neoApp and the wider Heatmiser neo ecosystem.
Call for heat
Add the wireless receiver when your neoFlo system needs to request heat from the boiler, zone valve or another heat-source output.
neoFlo, neoHub G3 and RF-SWITCH are sold separately. Product buttons open in a new tab so you can add each part of your chosen system without losing this guide.
Common questions
neoFlo can work in different ways depending on how you want the system to operate. These questions are here to help explain the most common setup options.
neoFlo fits to the radiator and controls the flow of warm water through the valve to manage room temperature. If you want connected app control, neoFlo can pair with neoHub G3, which links the system to your router and the neoApp. If you want the system to be able to call for heat, neoFlo can also work with the RF Switch, which can then trigger the boiler, zone valve or other heat-source output.
In simple terms: the heat source provides warm water, neoFlo controls the radiator, neoHub G3 adds app control, and RF Switch allows the wider system to respond when a room needs heat.
No. The packs are there as suggested routes in to make choosing easier, but they are not the only way to buy. For example, if you already have a neoHub G3, you may only need neoFlo units. If you want a system that can call for heat, you may add an RF Switch as well. The right setup depends on how you want the system to work in your home.
Yes. neoFlo is a strong option for homes that already use the neo ecosystem for underfloor heating and want to extend smarter control into radiator-heated rooms. In many cases, this means you can keep building on the neo setup you already have rather than starting again.
Yes. neoFlo can be used on its own to control an individual radiator locally. If you want wider system features such as app control, scheduling, remote access or smart-home compatibility, it should be paired with neoHub G3.
neoHub G3 is required for app control and for connecting neoFlo into the wider neo ecosystem. It enables use of the neoApp, remote access, schedules, routines and broader smart-home compatibility. If you already own a neoHub Gen 1 or Gen 2, you will need to upgrade to a neoHub G3 to use neoFlo with app-based control. If you only want local radiator control, neoFlo can still be used without a hub.
The RF Switch is used when you want neoFlo to be part of a setup that can call for heat. It receives signals and can trigger the boiler, zone valve or other heat-source output, allowing the wider system to respond when a room needs heating.
Yes. You can pair multiple neoFlo devices with neoHub G3 for smart control of radiators throughout the home. To create a system that can call for heat, up to 20 neoFlo devices can also be paired with an RF Switch, with up to 10 devices per channel.
Yes. neoFlo uses 4 x AA batteries, with battery life designed to last up to six years.
neoFlo is fitted with an M30 x 1.5 connection, which fits most modern radiator valves. It is also supplied with an RA adaptor for other valves. For older radiator types, please refer to the setup sheet, which lists additional adaptors that are also available to buy.
Yes. When paired with neoHub G3, neoFlo can form part of a broader connected home experience through the wider neo ecosystem, including app-based control and supported smart-home integrations.
Yes. Heatmiser has created a set of short videos to help explain installation, setup and everyday use of neoFlo.
Available to buy
Smarter radiator control for modern living.
Meet neoFlo, the smart radiator thermostat designed to bring quiet comfort, digital precision and room-by-room control into the neo ecosystem. Enable convenient app control or build a fuller heating solution for your home.
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The IMI Heatmiser neoFlo is an advanced smart thermostatic radiator control designed to deliver precise room-by-room heating management across radiator systems. Ideal for modern smart heating upgrades, neoFlo allows homeowners and installers to improve comfort, efficiency, and control while integrating seamlessly with existing Heatmiser systems, including wet underfloor heating installations.
Designed for both retrofit and new heating projects, neoFlo provides intelligent radiator zoning with quiet operation, accurate temperature management, and optional app connectivity through the Heatmiser neo ecosystem.
The neoFlo smart radiator thermostat is suitable for domestic heating systems using thermostatic radiator valves. It is ideal for:
neoFlo can operate as a standalone smart radiator controller for localised temperature management or as part of a wider connected system when paired with Heatmiser neoHub G3 and RF Switch components.
The unit is designed to fit most modern thermostatic radiator valves using a standard M30 connection and includes compatibility support for additional valve types using adaptors where required.
In properties using both radiators and wet underfloor heating, neoFlo plays an important role in creating a fully integrated smart heating system. It allows radiator-heated rooms to be managed within the same Heatmiser neo environment as underfloor heating zones, helping deliver consistent comfort and improved heating efficiency throughout the property.
By enabling independent room-by-room temperature control, neoFlo helps reduce unnecessary heating demand, improve zoning performance, and support lower running costs. When combined with neoHub G3 and RF Switch, the system can also participate in intelligent call-for-heat functionality, allowing the wider heating system to respond dynamically to room requirements.
neoFlo is designed for straightforward installation onto compatible thermostatic radiator valves. For app control, scheduling, and remote access, pairing with neoHub G3 is required.
Where boiler communication or call-for-heat functionality is required, installation of the RF Switch should be completed by a suitably qualified heating or electrical professional.
For best performance within smart zoning systems, neoFlo should be configured as part of a correctly balanced heating system.
For setups where neoFlo needs to do more than control the radiator, the full heating solution uses neoFlo + neoHub G3 + RF Switch. In this setup, neoFlo can help enable the heating system to fire when rooms call for heat, while neoHub G3 provides app control, remote access and scheduling.
The RF Switch is the key part of this setup. It receives the signal and must then be wired to the boiler or other heat source output so the system can respond correctly when heat is needed.
Installer note: Where RF Switch is used to call for heat, it must be wired to the boiler or other heat source by a suitably qualified installer.
