Heat Pump Systems in Abingdon, Banbury, Oxford & the Surrounding Areas

If you’re looking into greener, more cost-effective ways to heat your home, you may already have some knowledge about heat pumps. The term ‘heat pump’ refers to the collective technology that incorporates HVAC (heating, ventilation and air conditioning) devices. These pumps provide heat and hot water through a property-wide system. At Steve Cross Heat Pumps, we want you to have complete confidence and clarity before committing to any of our services. As such, on this page, we look at the components found in heat pump systems.


Operating out of Kidlington, our company covers Oxfordshire, the Cotswolds, Buckinghamshire, Berkshire and Surrey. Some of our key service areas include Oxford, Abingdon, Aylesbury, Banbury, Brackley and Witney, to name a few.


To understand how these devices heat and cool air, it helps to understand the various parts that make up heat pump systems.


Our team installs air-source and ground-source heat pumps. Despite many shared similarities, these systems consist of different configurations. We explore both below.


A Closer Look at Heat Pump Systems


Air-source Heat Pumps


Typically, the air-source devices we install in Oxfordshire, the Cotswolds, Buckinghamshire, Berkshire and Surrey consist of two separate systems. Using the process of vapour compression, they transfer hot air from one place to another in much the same way as a refrigerator – albeit reversed.


If you have, or decide to install, one of our air-source heat pump systems at your home, be it in Oxford, Abingdon, Aylesbury, Banbury, Brackley, Witney or the neighbouring areas, it includes four major elements:


  • Compressor – External fans draw ambient air over a heat exchanger coil. This generates heat that transfers to a cold refrigerant. As this fluid has a low boiling point, the heat only manages to turn it into a slightly warm vapour. This vapour then enters the compressor which duly increases the temperature. This process transforms the fluid into a much denser, hotter vapour.
  • Condenser – The condenser, also known as a heat exchanger, cools the hot and highly pressurised vapor. This creates a liquid with a lower pressure, albeit still high, and a moderate temperature.
  • Expansion Valve – The condensed refrigerant then passes through an expansion valve. This is a kind of metering device. As it travels through the valve, the fluid’s pressure lowers further.
  • Evaporator – The now low-pressure refrigerant enters the evaporator, which is another heat exchanger. Here, the fluid absorbs heat and starts to boil. This allows the warm vapour to re-enter the compressor again, where the cycle starts once more.



Ground-source Heat Pumps


When it comes to ground-source heat pump systems in Oxfordshire, the Cotswolds, Buckinghamshire, Berkshire and Surrey, the basic elements include the ground loop, the distribution system and the heat pump itself. Each of these consists of their own separate closed circuit. While it is possible to create an open ground loop, this isn’t a common configuration.


Despite being separate from one another, these systems don’t work independently. We connect the distribution system and ground loop to the heat pump, where they exchange heat.


If you’re considering a ground-source system at your property in Oxford, Abingdon, Aylesbury, Banbury, Brackley, Witney or the neighbouring areas, you can familiarise yourself with these 3 aspects below.


  • Ground Loop – The ground loop draws heat from the soil or nearby bodies of water, such as lakes and ponds. Fluid circulates through a pipe network, carrying the heat it absorbs to the evaporator in the heat pump.
  • Heat Pump – Within the heat pump, you will find the evaporator, compressor, condenser and expansion valve. This is the most basic part of ground-source heat pump systems. The pump receives heat from the ground loop. It then adds some extra energy (and heat) via the compressor before delivering it to the distribution system.
  • Distribution System – This system transports heat collected by the heat pump, particularly in the condenser, to your property. When inside, a network of pipes distributes this heat before releasing it through your preferred method, be it radiators, forced-air systems or underfloor heating. Distribution systems have their own pump that keeps the fluid inside your property flowing.


Our team excels in the installation of both the above heat pump systems. We can provide guidance and advice during an initial consultation to ensure we find the perfect solution for your needs.


Steve Cross Heat Pumps covers locations across Oxfordshire, the Cotswolds, Buckinghamshire, Berkshire and Surrey. To see how highly our clients in Abingdon, Aylesbury, Banbury, Brackley, Oxford, Witney and across the South East rate the results we achieve, please visit the Testimonials page.


Call 01865 841911 to schedule a consultation at your property. We install heat pump systems in Abingdon, Banbury, Oxford and throughout the surrounding areas.