Choosing the right air-to-air heat pump depends on your home’s size, insulation, floor plan and heating requirements. Mill offers three WiFi-enabled heat pumps designed for Nordic conditions, providing energy-efficient heating during winter and comfortable cooling during summer.
All three models can be controlled through the Mill app, allowing you to adjust temperatures remotely and create heating schedules tailored to your daily routine.
Mill Calm WiFi 3800W is designed for open-plan areas of up to 70 m², depending on insulation and layout. With a maximum heating capacity of 3800W and an indoor noise level as low as 21 dB, it combines efficient heating with quiet operation.
Its seasonal heating efficiency (SCOP) of 4.5 makes it an energy-efficient alternative to conventional electric heating, while WiFi control lets you manage heating and cooling directly from the Mill app.
Best for: Smaller homes and open-plan living spaces where quiet operation and efficient heating are priorities.
Mill Compact Pro WiFi 5200W offers a maximum heating capacity of 5200W and is recommended for open-plan areas of up to 100 m².
With a SCOP of 5.1 and an airflow capacity of up to 800 m³/h, it combines high seasonal heating efficiency with effective heat distribution throughout the home.
Its compact indoor unit and quiet operation, starting at 21 dB, make it suitable for living rooms and medium-sized open-plan spaces.
Best for: Medium-sized homes where energy efficiency, compact design and effective heat distribution are important.
Mill Compact Pro WiFi 7400W is the most powerful heat pump in the Mill range, with a maximum heating capacity of 7400W.
Recommended for open-plan areas of up to 170 m², it offers an airflow capacity of up to 950 m³/h, helping distribute warm or cool air across larger spaces.
With a SCOP of 4.3, it combines high heating capacity with efficient operation and convenient temperature control through the Mill app.
Best for: Larger homes and spacious open-plan living areas that require greater heating capacity and airflow.
Room size and floor plan: A heat pump’s ability to distribute heat depends on more than floor area. Open-plan spaces generally allow better airflow, while walls, closed doors and multiple floors can limit heat distribution.
Heating capacity: Choose a heat pump with sufficient capacity for your home’s heating requirements, particularly during cold winter temperatures. The maximum heating output alone does not indicate performance in extreme cold.
Energy efficiency (SCOP): SCOP measures seasonal heating efficiency. For example, a SCOP of 5.1 represents approximately 5.1 kWh of delivered heat per 1 kWh of electricity consumed under standardised test conditions. Actual performance varies with outdoor temperature and usage.
Airflow and noise: Higher airflow can improve heat distribution across larger spaces, while low indoor noise levels are particularly important in living rooms and other frequently used areas.
Smart temperature control: All Mill heat pumps offer WiFi connectivity and app-based heating schedules, making it easier to adjust temperatures according to your daily routine and avoid unnecessary heating.
The recommended room sizes are general guidelines. Insulation, climate, floor plan and installation location all influence performance. A professional assessment is recommended to determine the right heat pump capacity for your home.
