Air-to-Air Heat Pump for Multiple Rooms

At Eaglereach, our air-to-air heat pumps offer remarkable flexibility and versatility, capable of simultaneously heating or cooling multiple rooms. The key is selecting the appropriate system type with the right number of indoor heat pump units for optimal comfort throughout your space. Various options are available.

Understanding air-to-air heat pumps

Air-to-air heat pumps are devices used for heating and cooling indoor spaces. They operate on the principles of transferring heat energy between the outdoor and indoor air, making them a versatile and energy-efficient HVAC (Heating, Ventilation, and Air Conditioning) solution.

Here’s a breakdown of how they work:

Heat Transfer Mechanism:

  • Heating Mode: In cold weather, air-to-air heat pumps extract heat from the outdoor air and transfer it indoors. Even in chilly temperatures, heat energy is still present in the air.

  • Cooling Mode: In warm weather, the process is reversed. The heat pump extracts heat from indoor air and releases it outside, providing a cooling effect.

Components of an Air-to-Air Heat Pump:

  • Outdoor Unit (Condenser): This unit contains a compressor and a coil that absorbs and releases heat.

  • Indoor Unit (Evaporator): Distributing the conditioned air throughout the building.

  • Refrigerant: The heat transfer medium that circulates between the indoor and outdoor units, absorbing and releasing heat.

Energy Efficiency:

  • Air-to-air heat pumps are known for their energy efficiency, as they don’t generate heat but move it from one place to another.

  • The efficiency is often measured by the Coefficient of Performance (COP), representing the ratio of heat output to the amount of electricity input.


  • Air-to-air heat pumps can function in heating and cooling modes, providing a year-round solution for indoor comfort.
  • Some models have additional features like dehumidification and air filtration, improving indoor air quality.

Multi-Zone Heating:

  • Many air-to-air heat pump systems offer the capability of multi-zone heating. This means different rooms or zones within a building can be maintained at different temperatures, providing individualised comfort.

Environmental Impact:

  • According to EDF Energy, air-to-air heat pumps are generally considered environmentally friendly because they harness existing heat in the air, reducing the reliance on electricity or other fuel sources.

  • They can contribute to lower carbon emissions, especially when compared to traditional heating systems powered by fossil fuels.


  • While air-to-air heat pumps are effective in moderate climates, their efficiency may decrease in extremely cold temperatures.

  • Proper installation and regular maintenance are essential to ensure optimal performance and longevity.

In summary, air-to-air heat pumps are a versatile and energy-efficient solution for both heating and cooling indoor spaces. They leverage the ambient heat in the air, making them a greener alternative to traditional HVAC systems. Their ability to provide multi-zone heating appeals to those looking to customise comfort levels in different areas of a building.

How many rooms can I heat or cool with an air-to-air heat pump?

Air-to-air heat pumps operate on a split system, comprising an outdoor unit affixed to the exterior of your home, connected to one or more indoor units. These units extract heat from the outside air and distribute it at the desired temperature within your home.

There are two system types to consider:

Pair System:

  • Consisting of one outdoor and one indoor unit, this setup is suitable for heating or cooling a single space. It is particularly effective for smaller homes with an open-plan layout.

  • You can choose from wall-mounted, floor-standing, or concealed-ceiling indoor units, all seamlessly designed to complement your interior.


  • The outdoor unit can link to up to five indoor units, enabling temperature control in multiple rooms simultaneously. This maximises the utility of your outdoor unit and provides unparalleled versatility.

  • Each room can feature a different style or size unit to cater to specific space requirements and preferences. For instance, a smaller unit in the bedroom and a larger, more powerful one in the living space.

  • Individual temperature adjustments for each unit can be made using its dedicated remote control or an app, allowing for distinct temperatures in different rooms.

With the flexibility to select different indoor units for each room and the convenience of individual temperature adjustments, heat pump systems seamlessly integrate into your living spaces, offering optimal comfort and climate control. Embracing the versatility of air-to-air heat pumps creates an efficient and tailored solution for diverse home environments.

You should be looking at costs between £5,000 to £10,000 based on the size of your property. For homes with 2-4 occupants, the overall costs, encompassing installation and operation, typically range from £6,900 to £8,700. Larger homes require more robust heat pumps to maintain indoor temperatures, increasing installation expenses. 

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