Water Source Heat Pumps | Pure Thermal


Capacities from 30kW to 3000kW and output temperatures up to 120°c

  • Low global warming potential (sub 650 GWP) water source – geothermal heat pump specialists
  • 4 x natural refrigerant CO2 & hydrocarbon water source heat pump ranges
  • Output temperatures from 35°c to 120°c plus up to 50°c inlet/outlet DT capability
  • Dual or multiple source options – water source + cooling + waste heat source + air
  • High source/evaporator temperature capability up to 60°c
  • F-gas phase out ready water source – geothermal heat pump ranges

Industrial & Commercial Water Source – geothermal heat pumps for retrofit, new build or process applications

The Pure Thermal team have been at the forefront of the Industrial & Commercial Water Source Heat Pump sector for over 15 years and remains committed to delivering the highest performing systems to meet the demands of each application.

Pure Thermal understand that Industrial and Commercial applications call for Water Source – Geothermal Heat Pumps solutions that deliver both high performance levels and flexibility in application and this is reflected in the Seven Industrial & Commercial Water Source Heat Pump range that Pure Thermal offers.

Providing Water source Heat Pumps on a Supply & Commission/Maintain basis the Pure Thermal approach is application based with a committed approach to providing the best advice from the initial concept through to more detailed Heat Pump Selection & Specification discussions.

Water Source Heat Pump

Pure Thermal Industrial Heat Pumps and Pure Thermal Commercial Heat Pumps are able to provide very high temperatures up to 120°C while operating with the Lowest Global Warming/Low Carbon Refrigeration Systems. Whether satisfying a retrofit application or a new project then Pure Thermal have a range of high specification Water Source Heat Pumps to exceed the application demands from 30kW to 3000kW+.

Application flexibility is key to delivering both the lowest operating costs and also the highest levels of carbon savings. Pure Thermal Water Source Heat Pumps are available in single stage (Monobloc) or Two Stage system configuration to match an application requirement.

Monbloc Pure Thermal Commercial Water Source Heat Pump units with a stage refrigeration system are able to deliver a 95°C output temperature down to a 0°C source temperature. This removes the need to specify a cascade or two stage (2 x heat pump) system for medium capacity applications.

For larger application the Pure Thermal PLUS SO System delivers a Two Stage Water Source Heat Pump option to 3000kW+ with single system control & operation. With PLUS SO the control of the first stage Water Source Heat Pump and the second stage Water/Water unit is completely self-contained to provide the next generation of large capacity Two Stage Water Source – Geothermal Heat Pump systems. Water Source Heat Pump

Where waste heat is available a Pure Thermal Industrial Water Source Heat Pump can operate with dual or multiple source configuration. This means that the unit will operate as a Water Source – Geothermal Heat Pump but importantly also has the ability to operate with a second source to provide increased levels of efficiency. For example, an application may have a cooing requirement through the heating season, but varying in time and capacity, this means that a14°C flow is available from the chilled water return at certain times. Therefore if the Water/source temperature is below 14°C then the Pure Thermal Dual Source Heat Pump can operate using the 14°C cooling water return and not the lower temperature Water as its source heat which increases efficiency and hence uses less input electricity to operate.

Identifying the most appropriate system design is key to any project and to assist in this process Pure Thermal Water Source Heat Pumps can be provided with a Heat Pump Ready Verification Service which identifies the most appropriate & available system options to deliver the highest level of efficiency. At this stage, the type of Heat Pump is secondary as the focus is on providing the best advice based on the opportunity that the application presents.

Contact The Pure Thermal Team for an initial discussion and you’ll find the best advice approach that’s geared completely towards matching the demands of your project with the most appropriate solution.


The operation of a Water Source Heat Pump is covered in the general Heat Pump section on the link here, but in summary, the Water Source Heat Pump extracts thermal energy from the water (cooling the source) and via the process of refrigeration produces high-grade heat for use within the building, district heating system or process.


In this context, water can be derived from many sources, and therefore can be installed in a range of different environments and locations to suit your needs.

  • Under surface aquifers
  • Rivers
  • Sea
  • Estuaries
  • Wastewater
  • Effluent
  • Etc…


Output temperatures can be anywhere from 30°C to 120°C with capacities from 30 to 3,000kW.


Water represents a high-value source as it is available in abundance and produces a lot of power. Water Source Heat Pumps can deliver realisable levels of highly efficient performance.

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Call 020 3488 4618

to discuss your next Water Source Heat Pump Project

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