Barsham Barns
Barsham Barns is a complex of Historic Farm Buildings, which were converted as Luxury Holiday Lets. The Barns were renovated with R A Brown in 2004 completing installations of separate oil boiler for each of the 5 barns with unvented hot water cylinders and underfloor heating.
In January 2015 we visited Barsham Barns to conduct a comparison of heating systems with the view to switching to renewable.
Comparison Costs of installing and running 5 new Oil Boilers v’s Installing a GSHP to service the 5 barns
Expenses for an Oil Boiler system for the next 20 years
Fuel Expenses over 20 years: £400,000
Equipment replacement for 5 oil boilers over the next 20 years (£3000/each) £15,000
Total Installation & Running Costs: £415,000
RHI income: £0.00
Total Costs (minus RHI income): £415,000
Expenses for a Ground Source Heat Pump system for the next 20 years
Electricity Expenses over 20 years: £177,220
Ground Source Heat Pump Installation investment: £200,000
Total Installation & Running Costs: £377,220
RHI income (20 years): £345,150
Total Costs (minus RHI income): £32,070
Summary
Expense difference over 20 years is the Oil Boiler is £382,930 more expensive.
ASSUMPTIONS USED
Fuel Cost Assumptions: Oil £0.061/kWh Electricity £0.125/kWh
Temperature Star Rating: 2.5 Seasonal Performance Factor (SPF)
Heat meters: are required because the payback method is based on heat metering.
Tariffs: RHI tariff: 8.7p per kWh (tier 1 <1,314 running hours)
RHI tariff: 2.6p per kWh (tier 2 >1,314 running hours)
Design Criteria: We have estimated a heat load of 112 kw at -1.8°C, based on generic heat loses.
Maintenance: No Maintenance charges have been included. Heat pump’s and boilers can expect to have similar charges for maintenance.
