Mechanical Ventilation and Heat Recovery (MVHR)

A ventilation system that supplies and extracts air in a home. The MVHR unit is essential in a Greencore home to maintain a comfortable, constant temperature and low humidity levels. The heat recovery mechanism recycles energy to help keep the home at its desired room temperature.

Hemp-lime panel

All our homes are made from a unique wall panel system. The panels are made from FSC-approved timber and stuffed with a mix of hemp, lime and wood-fibre. This mix of natural materials is what gives our homes their high insulation qualities.

Passivhaus standard

We target the Passivhaus energy efficiency standard. According to the Passivhaus Trust, “Passivhaus buildings provide a high level of occupant comfort while using very little energy for heating and cooling. They are built with meticulous attention to detail and rigorous design and construction according to principles developed by the Passivhaus Institute in Germany, and can be certified through an exacting quality assurance process.”

Primary energy

The energy used for space heating/cooling, hot water and ventilation.

Annual heating/cooling

The maximum annual energy demand for space heating/cooling.

Peak heating load

The maximum annual energy demand for space heating and cooling.


Fabric Energy Efficiency Standard. This is the maximum energy demand for space heating and cooling as calculated by standard software SAP. (Although this is not as onerous as the annual heating and cooling demand calculated by PHPP, it is currently required for building regulations compliance.)

CO2 emissions

The maximum amount of CO2 emitted from space heating and cooling, hot water, lighting, and ventilation.

Carbon footprint

The CO2 emissions from the manufacture of materials used in the construction (taken from the ICE data base), less the CO2 equivalent from the sequestered carbon in the cellulose based materials, together with the CO2 emissions from the construction process.

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