30kW Ultra Quiet 80C Air Source Heat Pump | Pure Thermal

Project Overview:

Central London

quiet air source heat pump    central london


The project objective was to utilise a High Temperature capable Air Source Heat Pump to provide a percentage of the overall heat requirement of the building operating at temperatures of 75/68C.

The public building in Central London has clear carbon reduction objectives with one of the first steps to net zero being the installation of the high temperature capable Ultra Low Noise 80C capable Heat Pump.

The application strategy is to incorporate the Heat Pump to initially operate with the existing boiler at 75/68C flow temperatures.

The ongoing strategy reflects the addition of a second heat pump to remove boilers completely.

As such the Heat Pump package is designed to provide immediate carbon-saving benefits, with ease of installation, providing a substantial fraction of the overall heating demand.

temperature graph   max and min temperatures

Equipment Schedule

Chrome OHT 30kW Air Source Heat Pump System (30kW at a design -5C external ambient temperature)


1 x OHT Chrome Enerblue 40SLN Air Source Heat Pump unit

  • Capable of delivering 80C output temperature at -5C external

1 x Stratified Integration Tank

  • Providing system integration and buffering to ensure reliable and efficient operation

Ref: Design 75/68C and -5C external ambient condition


air source heat pump diagram










The flexibility of the 80C capable OHT Chrome range enabled the operating temperatures of the existing LTHW Boilers to be matched by the new Heat Pump. This then allowed the existing boilers to operate with no immediate modifications to the existing distribution system.

By the introduction of the external integration vessel, the Heat Pump can operate efficiently by integrating with the existing boiler in a very straightforward manner.

This is a typical example of an immediate high temperature Heat Pump ‘Heat Fraction’ retrofit application.

This type of configuration provides Heat Pump/Boiler Hybrid operational benefits from day one and forms a starting point for further decarbonisation measures to be implemented within the building.

Pure Efficency | Pure Sustainability | Pure savings