Case Study
Grant Renewables provide solution for Grade II building
Grant Renewables provide solution for Grade II building

The Sail Loft, a Grade II listed building in Cowes on the Isle of Wight has undergone a major refurbishment to provide open plan office space for a charity which is looking to expand.

To make the building as energy efficient as possible, a range of renewable technologies from Grant UK were adopted which overcame the constraints of the existing building and the limitations of the listed building permission.

Although one of the oldest buildings in Cowes, Ian Glasspool, the owner/developer succeeded in obtaining listed building consent to install an On-roof Grant Solar PV (Photovoltaic) System. The system, comprising 38 x 180W modules on the rear south facing roof of the building will provide approximately 6,100kWh of energy per annum. Used in conjunction with Grant’s Grid inverters, revenue will be generated from the production of electricity via the Governments’ ‘Feed-in Tariff’ (FIT) scheme.  Under this scheme which guarantees a payment for all electricity generated by the system (as well as a separate payment for the electricity exported to Grid), a significant contribution will be made towards the energy needs of the office space.   Heat for the office space will be provided through a combination of an Aerona Air Source Heat Pump and Solar Thermal.

The four collector Aurora Solar Thermal System, generating approximately 2,774kWh of energy per annum (in addition to saving approximately 3,061kWh of electricity) is linked to a ThermaWave 400 litre Thermal Store; this will provide hot water which is pumped around a series of low level oversized radiators. If the flow temperature drops below the required level the Aerona Air Source Heat Pump will provide the additional heat to keep the ThermaWave Thermal Store at the required temperature.

The Grant Solar PV on-roof system has many unique features which include the flexibility to install the solar modules in a portrait or landscape arrangement. The system is also arbitrarily expandable should energy requirements increase.  Grant Solar Thermal collectors are available in a choice of two finishes; bronze and aluminium, and have an excellent efficiency performance of 81%. The on-roof Solar Thermal system also has the added benefit of utilising the same anchors and rails as are used on the Grant Solar PV system, thus making it a cost-effective way of combining both solar technologies.

Commenting on the project, Ian Glasspool said: "I decided to use products from Grant UK for a number of reasons, but primarily because of the excellent customer service and technical support they have provided on previous installations. Purchasing the entire range of products from a single supplier also makes sense as it ensures compatibility when integrating the various renewable technologies".

Grant Renewables provide solution for Grade II building