Case Study – Mewstone Assets

Achieved cost savings of 30%


Award-winning student accommodation company Mewstone Assets were looking to optimise their investment in a 14 apartment new build in Mutley – a popular student area of Plymouth.


The primary design objective was to create solutions for the power requirements of the building that minimised the operating costs of the building for the long term whilst remaining balanced against initial capital costs. The scope was broad-ranging and covered all aspects of building services:

Design, supply and install an energy efficient heating and hot water generation system

Overcome a significant requirement for hot water services with minimal space for plant

Integrate onsite electrical generation without compromising visual appearances of the building

Reduce utility costs through minimising standing charges and non-commodity elements


Heating & Hot Water

Installation of two 50kW condensing gas boilers and a 2000L accumulator tank

Centralised plant room distributing heating and hot water to each apartment

Installation of building management system providing weather compensation, variable temperature flow control, remote monitoring and fault notification

System temperature management to ensure maximum boiler efficiency

Installation of packaged plate heat exchanger for domestic hot water generation providing instantaneous generation to meet demand without utilising space

Solar PV

Installation of a 7.56kW Trina Smart solar PV system – mounted within the roof structure instead of slates to maximise cost savings and minimise visual intrusion


Recommendation to install only one supplier meter for each service for the whole building, rather than the traditional approach of a supplier meter per service for each apartment

Implementation of gas and electricity meter installation and procurement of gas and electricity supply contract


Operating cost savings over a conventional building services solution for this apartment block will be in the region of 30%;

 Gas consumption reduced through increased heating system efficiency as a result of excellent design and control

Gas, water and electricity infrastructure costs significantly reduced by only having one connection point per service

Maintenance costs reduced by remote monitoring and fault notification

Annual servicing and inspection costs only for two central boilers rather than one per apartment

Annual benefit of £1300 from the Trina Smart solar PV System giving a 7.5% ROI with an additional £2500 saving on roof materials

Competitively tendered utility supply contracts; tariff rates were reduced as meter types were commercial rather than domestic and only one standing charge per service rather than one per
service per apartment

You can download this case study here – Mewstone Assets Case Study


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