Site Type 1,000 Year Old Private Residence & Short Term Let Historic Accommodation
System Type 2 x 70 kW Wood Pellet Fired Boiler System for Space Heating and
Location Wonersh Common, Surrey
Date Commissioned 2014
LC Energy (LCE) was appointed to assess technical feasibility and financial feasibility of establishing a centralized, wood fired heating system at The Manor. LCE compiled an appropriate system requirements specification, invited and assessed tenders for supply of a compliant system, and advised The Manor’s owners on selection of boiler system supply and installation contractors.
An oil-fired boiler and an oil-fired warm air unit were removed and replaced with heat-exchangers and associated controls. An oil-fired boiler was retained within The Manor to act as a reserve heat-source, in the event that the pellet-fired system could not supply heat, for example during its servicing or repair.
A new boiler house and an internal fuel store have been established at some distance from The Manor building. Heat is delivered to The Manor for space heating and water heating via a mainly underground, pre-insulated heat main. Its route required a section which now also traverses The Manor’s ancient moat!
Fuel Cost Savings
Fuel supply costs are expected to be reduced by about 1/3, as a result of changing fuel from heating-oil to wood pellets. Unit-cost of useful heat from delivered heating-oil can be up to 7.0 p/kWh, whereas unit-cost of useful heat from delivered pellet fuel is about 4.4 p/kWh.
Non Domestic Renewable Heat Incentive (RHI) Payments
The Manor is assessed for Council Tax purposes as several properties. As a result, the newly established, wood pellet fired, local district heating system qualifies for Non Domestic RHI Payments from OfGEM in order to help significantly to offset the capital investment made. An undiscounted Payback Period of 7 years is estimated. Over 20 years, the project indicates a healthy, positive Net Present Value, when compared to making no investment in a system to supply sustainable heat.
Fossilized Carbon Emissions Reductions
The owners of The Manor are committed to supporting sustainable development and wished to reduce their contribution to negative environmental impacts from extraction, transport and use of fossil fuels