They provide fast, silent and controllable room-by-room heating in spaces where central heating does not provide enough warmth, or where you do not want to heat the entire home just to make one room comfortable.
Typical examples include:
- home offices
- bedrooms
- bathrooms
- converted lofts
- basements
- hobby rooms
- conservatories
- guest rooms
Instead of increasing the central heating temperature throughout the whole home, you can use a Mill panel heater to heat the room you are actually using.
Mill Invisible combines smart heating technology with Scandinavian design. The heaters are slim, discreet and powerful, while the smart functions help reduce unnecessary energy use.
A flexible supplement to central heating
Central heating is designed to provide heat across large parts of a home.
That works well for maintaining a general base temperature, but it can be inefficient when one room needs more heat than the rest.
A Mill Smart WiFi panel heater solves this by providing local heating.
For example:
- Central heating maintains 18–19°C throughout the home.
- A home office can be heated to 21°C during working hours.
- A bathroom can be heated to 22°C in the morning.
- A bedroom can follow its own temperature schedule.
- An unused room can remain at a lower temperature.
This means you can heat the rooms you use instead of increasing the temperature throughout the entire house.
Fast room heating – warm in approximately 15 minutes
Mill Invisible Smart WiFi panel heaters are designed to heat a room quickly.
Under suitable room conditions, the heater can provide noticeable warmth and help heat the room in approximately 15 minutes.
This makes a panel heater particularly useful in rooms that are not used continuously.
For example, a home office does not necessarily need to stay warm throughout the night. Instead, the heater can increase the temperature shortly before the working day starts.
The same applies to bathrooms, guest rooms and hobby rooms.
Silent heating for bedrooms, offices and living spaces
Mill Invisible panel heaters operate silently.
There is no fan noise, making them suitable for:
- bedrooms
- home offices
- living rooms
- children’s rooms
- guest rooms
The silent operation also means the heater can provide heat during the night without disturbing the room.
How much energy does a Mill panel heater use?
A Mill panel heater provides heat directly to the room where it is installed.
Under the right conditions, a panel heater can use as little as 5 kWh of electricity per m² heated.
The main advantage of local electric heating is that you only need to heat the area you are using.
For example, if you are working in a 10 m² home office, the panel heater only needs to provide heat to that room. You do not need to increase the central heating temperature throughout a much larger home.
Actual consumption depends on factors such as:
- room size
- insulation
- outdoor temperature
- desired room temperature
- windows and external walls
- usage pattern
- how much the room needs to be heated
Smart technology designed to reduce unnecessary energy use
Mill Smart WiFi panel heaters include several technologies designed to maintain comfort while avoiding unnecessary energy consumption.
Mill PID Wattage Tech™
Traditional thermostats often operate by repeatedly switching between full power and no power.
Mill PID Wattage Tech™ works differently.
It is a dimming thermostat that adjusts the heater’s power output once the target temperature has been reached.
For example, a 1200 W heater does not need to continue operating at 1200 W when only a small amount of heat is required to maintain the room temperature.
Instead, the heater can reduce the wattage and maintain a more stable temperature.
This helps reduce temperature overshoots and unnecessary energy use.
Mill Predictive Heating™
Mill Predictive Heating™ adapts automatically to the room environment.
The system learns how quickly the room heats up and cools down and uses this information to determine when heating should begin.
For example, if the room should be 21°C at 07:00, the heater can start heating earlier so the desired temperature is reached at 07:00.
This means the schedule is based on the temperature you want at a specific time rather than simply turning the heater on at that time.
Wattage Cap
Wattage Cap allows you to set a ceiling on the heater’s power draw.
This means the heater does not use more power than the limit you define.
This can be useful when you want more direct control over energy consumption or available electrical capacity.
Eco Mode
Eco Mode provides an additional way to reduce unnecessary heating.
It can be used when maximum comfort temperature is not required, helping keep energy consumption lower.
Open Window Detection
If the heater detects a sudden temperature drop consistent with an open window, Open Window Detection can reduce unnecessary heating while the window is open.
This prevents the heater from trying to compensate for heat that is immediately leaving the room.
Full control in the Mill-App
Mill Smart WiFi panel heaters can be controlled through the Mill Norway App.
The app allows you to:
- set temperatures room by room
- create heating schedules
- adjust temperatures remotely
- monitor energy consumption
- plan heating around high and low tariff periods
- group heaters by room
For example, you can configure:
- bathroom: 22°C from 06:30 to 08:00
- home office: 21°C during working hours
- bedroom: lower temperature during the day and warmer before bedtime
- living room: higher comfort temperature during the evening
This means different rooms can follow different heating schedules without changing the central heating setting for the whole house.
Documented energy savings of up to 30%
Mill’s smart heating features can provide energy savings of up to 30% compared with traditional electric heaters.
The savings are documented by the Norwegian University of Science and Technology (NTNU).
The reduction comes from using several smart functions together, including:
- PID Wattage Tech™
- Predictive Heating™
- room-by-room schedules
- Wattage Cap
- Eco Mode
- Open Window Detection
- energy monitoring
The purpose of these features is to reduce unnecessary energy use while maintaining the desired room temperature.
Suitable for almost any room
Home office
A home office is often used only during working hours.
Instead of increasing the central heating temperature throughout the home, a Mill panel heater can heat the office when it is in use.
This makes local electric heating particularly suitable for home offices.
Bedroom
Mill Invisible is silent and has a low surface temperature.
This makes it suitable for bedrooms and for overnight use.
Temperatures can also be scheduled so the bedroom is cooler during the day and reaches the desired temperature before bedtime.
Bathroom
Mill Invisible Smart WiFi panel heaters are IPX4 approved, making them suitable for installation in appropriate bathroom zones.
A bathroom can therefore have its own temperature and schedule independently of the rest of the home.
Converted loft or basement
Converted lofts and basements often lack sufficient heat from the home’s central system.
A panel heater can provide a dedicated heating source without requiring changes to the entire central heating system.
Hobby room or guest room
Rooms that are only used occasionally do not need to stay at full comfort temperature all day.
A Smart WiFi panel heater can keep the temperature lower when the room is unused and increase it when needed.
Safe enough to run overnight or unattended
Mill Invisible is designed with multiple safety features.
These include:
- low surface temperature
- overheating protection
- child lock
- frost protection
- IPX4 bathroom approval
The heaters can therefore be left operating overnight or unattended when used according to the product instructions.
This makes them suitable for bedrooms, family homes and rooms where stable background heating is required.
Works with your smart home
Mill Smart WiFi panel heaters support several major smart home platforms and protocols.
These include:
- Matter
- Google Home
- Amazon Alexa
- Apple Home
- Zigbee 3.0
- Homey
- Tibber
- Open API
Voice control is also supported through compatible smart home platforms.
The Open API can be used with systems such as solar or battery solutions where supported.
Scandinavian design
Mill Invisible combines heating performance with a discreet Scandinavian design.
The heater is designed to sit close to the wall and blend naturally into modern interiors.
The design focuses on:
- slim profile
- discreet appearance
- clean Scandinavian lines
- silent operation
- flexible placement
The result is a heater designed to provide warmth without dominating the room visually.
Can a Mill panel heater replace central heating?
Yes, in individual rooms.
Mill Invisible can be used as the primary heating source in rooms where it is correctly sized for the heating demand.
It can therefore work as the main heater in spaces such as:
- bedrooms
- home offices
- bathrooms
- guest rooms
- converted lofts
- hobby rooms
For homes with an existing central heating system, however, one of the main use cases is as a supplement to central heating.
Central heating can provide the base temperature for the home, while Mill panel heaters provide additional heat in selected rooms.
This combination gives better room-by-room control without requiring the whole home to be heated to the highest desired temperature.
Example: central heating combined with Mill panel heaters
Consider a home where central heating maintains a base temperature of 18°C.
The household wants:
- bathroom: 22°C in the morning
- home office: 21°C during working hours
- living room: 21°C during the evening
- bedroom: scheduled comfort temperature before bedtime
- unused rooms: 18°C
Without local heating, the central thermostat may need to be increased to achieve the desired temperature in the warmest room.
With Mill Smart WiFi panel heaters, the central system can continue maintaining the base temperature while individual rooms receive additional heat.
This is the core idea behind room-by-room heating:
Central heat for the home. Mill heat where you need it.
Frequently asked questions
What is a Mill Smart WiFi panel heater best used for?
It is particularly suitable as a supplement to central heating in rooms that need more heat than the rest of the home, or in rooms that are only used during specific periods.
Examples include home offices, bathrooms, bedrooms, converted lofts, basements and guest rooms.
How quickly does a Mill panel heater heat a room?
Mill Invisible is designed to provide fast heat and can warm a suitable room in approximately 15 minutes, depending on room conditions.
Is a Mill panel heater silent?
Yes. Mill Invisible panel heaters operate silently and are suitable for bedrooms and home offices.
Can I use a Mill panel heater in a bathroom?
Yes. Mill Invisible Smart WiFi panel heaters are IPX4 approved and can be used in appropriate bathroom locations.
Can the heater be left on at night?
Yes. Mill Invisible includes multiple safety features and is designed to be suitable for overnight or unattended use when installed and used according to the instructions.
Can a Mill panel heater reduce energy consumption?
Mill’s smart heating technologies can provide savings of up to 30% compared with traditional electric heaters, documented by NTNU.
The heater also allows you to heat individual rooms rather than raising the temperature throughout the whole home.
How much electricity can a panel heater use?
Under the right conditions, a panel heater can use as little as 5 kWh of electricity per m² heated. Actual consumption depends on the room, insulation, temperature and usage.
Does Mill work with smart home systems?
Yes. Mill Smart WiFi heaters support Matter, Zigbee 3.0, Homey, Tibber and major platforms such as Google Home, Amazon Alexa and Apple Home.
Key features
Mill Invisible Smart WiFi Panel Heaters include:
- fast room heating
- silent operation
- Smart WiFi control
- room-by-room scheduling
- energy monitoring
- Mill PID Wattage Tech™
- Mill Predictive Heating™
- Wattage Cap
- Eco Mode
- Open Window Detection
- low surface temperature
- child lock
- overheating protection
- frost protection
- IPX4 bathroom approval
- Matter
- Zigbee 3.0
- Homey and Tibber integration
- voice control
- Open API
- Scandinavian design
- 5-year warranty
Mill’s smart heating features can provide energy savings of up to 30% compared with traditional electric heaters, documented by NTNU.
Summary
Mill Invisible Smart WiFi panel heaters are designed as a flexible supplement to central heating and as a room-by-room heating solution.
They are particularly useful in rooms where central heating does not provide enough heat or where heating the entire home would be unnecessary.
Mill Invisible provides:
- fast heat
- silent operation
- individual room control
- Smart WiFi scheduling
- energy monitoring
- advanced energy-saving technology
- smart home compatibility
- bathroom approval
- multiple safety features
Under the right conditions, a panel heater can use as little as 5 kWh of electricity per m² heated.
Mill’s smart heating technologies can also provide documented energy savings of up to 30% compared with traditional electric heaters.
For homes with central heating, the principle is simple:
Use central heating for the base temperature. Use Mill Smart WiFi panel heaters for precise comfort in the rooms where you need it.
Designed in Norway.
5-year warranty.
