Air Source Heat Pump Systems: What Are the Main Options?

Choosing an air source heat pump is not simply about selecting a particular output. Different systems are designed around different heating requirements, property types and installation arrangements.

Infinity Solar UK supplies a range of Daikin air source heat pump systems, including low-temperature monobloc, low-temperature split and high-temperature options. Understanding the differences between these systems can make it easier to identify the type that may suit a particular project.

What Is an Air Source Heat Pump System?

An air source heat pump takes heat from the outside air and transfers it into a property for heating. Air-to-water systems can also be used with domestic hot water arrangements, depending on the system configuration.

Infinity Solar UK currently lists Daikin air source heat pumps across several categories, including Altherma Monobloc, Altherma Split and Altherma High Temperature systems.

The main differences are in how the system is configured and the temperature requirements it is designed to meet.

1. Low-Temperature Monobloc Heat Pumps

A monobloc system combines the main hydraulic components within the outdoor unit. Infinity Solar UK describes its Daikin Altherma low-temperature monobloc systems as air-to-water systems that can be suitable where indoor space is limited.

For example, the Daikin Altherma 3 M range includes models available in different outputs. The EDLA08EV3 is an 8kW heating-only monobloc, while other listed models provide different capacities.

Infinity Solar UK also lists reversible monobloc models that provide both heating and cooling. These systems can also be combined with domestic hot water arrangements, depending on the configuration.

Why consider a monobloc?

A monobloc configuration can be useful where keeping the indoor installation arrangement relatively simple is important. Because the hydraulic components are incorporated into the outdoor unit, the indoor space requirements can differ from those of a split system.

However, the correct installation arrangement should always be assessed for the individual property.

2. Low-Temperature Split Heat Pumps

A split air source heat pump separates the system between an outdoor unit and an indoor unit.

Infinity Solar UK lists Daikin low-temperature R-Split systems in several capacities, including both lower- and higher-capacity options. Its product range includes wall-hung and integrated configurations.

For example, the Daikin Altherma 3 R F is described by Infinity Solar UK as a low-temperature split air-to-water heat pump for heating and hot water. The system can incorporate a domestic hot water tank and integrated back-up heater, depending on the model.

A split configuration can therefore provide different options for arranging the indoor and outdoor components, depending on the property and selected system.

3. High-Temperature Heat Pump Systems

Not every property has the same heating requirements. Infinity Solar UK also offers Daikin high-temperature heat pump systems.

Its current range includes high-temperature systems in different capacity categories, including 8–12kW and 14–18kW options.

The Daikin Altherma 3 H HT F, for example, is described as a high-temperature split air-to-water heat pump designed for heating and hot water. The listed configuration integrates domestic hot water and the heat pump within the indoor unit.

High-temperature systems can therefore be relevant when assessing projects where the required heating arrangement differs from a typical low-temperature system.

Heating Only or Reversible?

Another consideration is whether the system is designed for heating only or can also provide cooling.

Infinity Solar UK lists both heating-only and reversible heat pump models. For example, its low-temperature monobloc range includes separate heating and reversible options.

A reversible system can provide heating and cooling, while a heating-only model is focused on heating requirements. The appropriate choice depends on the property's needs and the system design.

What About Domestic Hot Water?

Domestic hot water is another factor to consider when selecting an air source heat pump.

Some Daikin systems available through Infinity Solar UK can be combined with domestic hot water, while other configurations integrate a hot water tank into the indoor unit. The website also offers complete heat pump kits containing a heat pump, pre-plumbed cylinder and essential accessories.

Infinity Solar UK's current complete-kit range includes different heat pump outputs and cylinder capacities, allowing systems to be configured for different project requirements.

How Do You Choose the Right System?

The right air source heat pump should be selected based on the property and the intended heating system rather than simply choosing the highest output.

Consider:

  • Required heating output
  • Property size and heat demand
  • Existing heating system
  • Radiators or underfloor heating
  • Domestic hot water requirements
  • Available indoor and outdoor space
  • Whether cooling is required
  • Monobloc or split configuration
  • Required cylinder capacity
  • System compatibility and installation requirements

A proper heat-loss assessment and system design should be carried out before selecting the final model.

Final Thoughts

There is no single air source heat pump configuration that suits every property. Low-temperature monobloc, low-temperature split and high-temperature systems each provide different options for residential and other heating projects.

Infinity Solar UK's current range focuses on Daikin air source heat pumps, including monobloc, split, reversible and high-temperature systems, as well as complete heat pump kits.

Understanding the differences between these options is a useful first step. The final system should then be selected according to the property's heat demand, available space, hot water requirements and overall heating design.