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Technical Specifications – Rotenso Windmi Monoblock Heat Pump

Model 6 kW 8 kW 10 kW 12 kW 14 kW 16 kW
Heating capacity (A7/W35) 6.20 kW 8.30 kW 10.00 kW 12.10 kW 14.50 kW 16.00 kW
COP (A7/W35) 5.00 5.20 5.00 4.95 4.70 4.50
Heating capacity (A7/W55) 6.00 kW 7.50 kW 9.50 kW 12.00 kW 13.80 kW 16.00 kW
COP (A7/W55) 3.00 3,18 3,10 3,10 3.00 2.90
Cooling capacity (A35/W18) 6.55 kW 8.40 kW 10.00 kW 12.00 kW 13.50 kW 14.90 kW
EEA (A35/W18) 4.90 5.05 4.80 4.00 3.60 3.40
SCOP (35°C) 4.95 5.21 5,19 4.81 4.72 4.62
SCOP (55°C) 3.52 3,36 3.49 3.45 3.47 3,41
Energy label (35°C) A+++ A+++ A+++ A+++ A+++ A+++
Energy label (55°C) A++ A++ A++ A++ A++ A++
Max. flow temperature 62°C 62°C 62°C 62°C 62°C 62°C
Cooling range (outside temp.) -5°C ~ 43°C -5°C ~ 43°C -5°C ~ 43°C -5°C ~ 43°C -5°C ~ 43°C -5°C ~ 43°C
Heating range (outside temp.) -25°C ~ 35°C -25°C ~ 35°C -25°C ~ 35°C -25°C ~ 35°C -25°C ~ 35°C -25°C ~ 35°C
Sound pressure outdoor unit 45 dB(A) 46 dB(A) 49 dB(A) 50 dB(A) 51 dB(A) 55 dB(A)
Sound power outdoor unit 58 dB(A) 59 dB(A) 60 dB(A) 64 dB(A) 65 dB(A) 68 dB(A)
Refrigerant R32 (GWP 675) R32 R32 R32 R32 R32
Filled amount of refrigerant (<15m) 1.5 kg 1.65 kg 1.65 kg 1.84 kg 1.84 kg 1.84 kg
Connection dimensions liquid/gas 1/4" – 5/8" 3/8" – 5/8" 3/8" – 5/8" 3/8" – 5/8" 3/8" – 5/8" 3/8" – 5/8"
Outdoor unit dimensions (WxDxH) 1008×426×712 mm 1118×523×865 mm 1118×523×865 mm 1118×523×865 mm 1118×523×865 mm 1118×523×865 mm
Outdoor unit weight (net/gross) 58 / 63.5 kg 75 / 89 kg 75 / 86 kg 112 / 125.5 kg 112 / 125.5 kg 112 / 125.5 kg
Wi-Fi Built-in as standard idem idem idem idem idem
Smart Grid compatibility Yes Yes Yes Yes Yes Yes
Modbus connection Yes Yes Yes Yes Yes Yes
Electrical element (optional) Yes (up to 9 kW) Yes Yes Yes Yes Yes
Power supply 1-phase / 3-phase 230V / 400V 230V / 400V 230V / 400V 400V 400V 400V

Rotenso Windmi Monoblock Heat Pump (6–16 kW)

Compact. Quiet. Powerful. Smart.

The Rotenso Windmi Monoblock heat pump is a highly efficient and whisper-quiet air-to-water solution for sustainable heating, cooling and hot water production. This monoblock series combines powerful performance with a modern, low-maintenance design and is available in capacities from 6 to 16 kW – perfect for both residential and commercial applications.

Whether you choose renovation or new construction: with the Windmi you choose future-proof comfort, maximum energy efficiency and easy installation. Thanks to the compact design with all components integrated in the outdoor unit , no indoor unit is required.


Why choose the Windmi?

  • Completely monoblock : all technology is in the outdoor unit – easier and quicker to install

  • Highest energy class : A+++ at 35°C, A++ at 55°C – ready for the future

  • Max. supply temperature 62°C – suitable for underfloor heating and radiators

  • Quiet and powerful : from only 45 dB(A) in silent mode

  • Wide operating range : heating up to -25°C and cooling up to 43°C outside temperature

  • Smart Grid Ready : optimally combinable with solar panels

  • Wi-Fi integrated : easily operate your heat pump via smartphone (TUYA app)

  • Includes touchscreen controller with color display, clock functions and energy meter

  • Modbus communication for home automation and smart control


What is included as standard?

According to the catalog, the Windmi is equipped as standard with:

  • Twin rotary inverter compressor

  • Electric backup heater (max. 9 kW)

  • Wi-Fi module (Tuya Smart app)

  • Smart touchscreen controller (color screen)

  • Compressor crankcase heater

  • Condensate collector with heated drip tray

  • Y-filter for water circuit

  • DHW (tap water) temperature sensor

  • Pressure expansion vessel

  • Three-way valve connection prepared

  • Modbus communication & Smart Grid support

  • Security sensors and silent mode


Specifications per model (6 to 16 kW)

The full technical table can be found above. This includes:

  • Heating & cooling capacity (A7/W35, A35/W18, A7/W55)

  • COP / SCOP / HONOR

  • Seasonal yields (35°C and 55°C)

  • Sound pressure and sound power

  • Dimensions and weight

  • Connection dimensions and refrigerant (R32)


Installation service by New-Heating

At New-Heating you are assured of more than just delivery. We offer:

  • Customised advice : we calculate which model best suits your home

  • Professional installation : by certified professionals (including piping & electrical engineering)

  • Commissioning and adjustment

  • Combination with buffer tank, tap water tank or solar panels possible

  • Maintenance contract and breakdown service available

  • Warranty support & 24-hour service in case of malfunction


Application and subsidy options

The Rotenso Windmi is suitable for:

  • New construction and renovation projects

  • Low and high temperature systems (radiators or underfloor heating)

  • Combination with existing boiler possible (hybrid setup)

  • ISDE subsidy (NL) possible depending on assets


Interested in a quote or installation?

Request a no-obligation quote now or contact us using the form

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