Zeroth Energy System

An advanced communal ambient loop solution using in-apartment heat pumps to provide building services to residential apartments.

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Zeroth Energy System

This innovative system has been designed in conjunction with leading industry developers, recognising the need for a new, highly efficient communal solution for residential apartments.

The Zeroth Energy Systems takes a compact, in-apartment water source heat pump, ambient loop solution and central plant to offer heating, hot water, and comfort cooling to apartment developments as a commercially and advantageous solution.

Suitable for offsite prefabrication, including utility pods

Flexible choice of plant technology, apartment controls and hydronic emitters

Up to a 50% reduction in plant room footprint

Reduces overheating in communal areas and peak heat losses by up to 90%


Cost effective comfort cooling through a two-pipe system


System efficiency of greater than 300% when modelled with an air source heat pump in SAP 2012


In-apartment heat pumps provide efficient HVAC services

The advantages of heat pumps are available across multiple applications but are best placed in well-insulated buildings where the heat pump effects on furthering the building efficiency can be realised. Apartments can benefit from a system where all the heating, cooling and hot water supply is provided by an in-apartment heat pump.
A heat pump may also be integrated with a specific function, such as mechanical ventilation with heat recovery, to maximise the energy cycle. The system can work together with another energy source, such a traditional combustion boiler but also integrate with a fully renewable source like solar PV system. In addition to the primary function of a heat pump to deliver HVAC services, the excess energy generated can be discharged into thermal storage systems, or buffer tanks, to provide a more efficient on-demand service for heating and cooling without the need to short cycle the system when the demand is low. This creates a more efficient and sustainable communal ambient network.

Product specification

The Zeroth unit is a water source heat pump which connects to an ambient water loop designed at 25oC. This loop is kept within operating temperatures by a central plant.

Product RangeDescriptionNominal Rating at S25/W35*Cylinder SizeControllerMax Flow Temp
Zeroth Energy SystemA water-to-water in-apartment heat pump connecting to an ambient network to provide heating, hot water, and cooling services to residential apartments.4 & 6.4kW172LIn-built user-friendly controls, with option for external inputs to third party controllers55°C heating
*S25= Source temperature at 25°C / W35= water temperature 35°C

Discover more about designing communal ambient networks

Technical Resources

For Zeroth Energy System BIM files, spec sheets and product information, alongside solution brochures and compliance guides, visit out technical resource page.

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To learn more, book a CPD on the benefits of ambient networks or on the Future Homes Standard to see how it performs in upcoming regulatory changes.

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Contact us

To discuss the Zeroth Energy System and how it can be applied to your project in more detail, get in contact to be put in touch with your regional specialist.

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