Case study: National Trust - Plas Newydd

Plas Newydd is an 18th century mansion set on the edge of the Menai Strait on the Isle of Anglesey. The mansion was identified as the largest consumer of oil out of the National Trust’s extensive estate, requiring 128,000 litres of oil each year to heat the building, which is responsible for 350 tonnes of carbon emissions a year and £76,000 in cost.

The National Trust worked with the Carbon Trust and a number of other organisations to develop and deliver the energy efficiency improvements at Plas Newydd. An initial opportunities assessment took place in 2009 to identify what short term and long term improvements could be implemented. Through making simple energy efficiency improvements, energy use at Plas Newydd was reduced by a third in just two years.

The National Trust is currently making substantial investments in its historic properties with the aim of generating 50% of its energy from renewable sources by 2020. At Plas Newydd 50 kW of solar PV panels have been installed and a 300 kW marine sourced heat pump is projected to enable an 80% reduction in carbon emissions.

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energy efficiency, carbon emissions, retrofit, solar PV, heat pump, marine source heat pump, Carbon Trust, National Trust, renewable heat, renewable electricity

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