Greenstone Heat Pumps installed a Ground Source Heat Pump (GSHP), using horizontal loops, for Rushmere Nurseries, a plant growing nursery in Milton Keynes.
Specifying a suitable heat pump system
A comprehensive feasibility study had been carried out by an independent company, FEC Energy, owned by the NFU.
FEC Energy advised a system size of around 350kW.
Four 88kW Thermia Heat Pumps totalling 352kW was ultimately settled on by Greenstone and the customer.
Removing dependency on oil
Rushmere Nurseries was previously using an oil boiler to heat the site, consuming between 40 -50,000 litres and spending approx. £37,500 per annum.
Renewable Heat Incentive (RHI)
As with most renewable energy technologies, heat pumps are government backed. The Renewable Heat incentive (RHI), paid for 20 years, means that the financial benefits increase dramatically.
The RHI is paid based on a Tier 1 and Tier 2 system. Tier 1 means that for 1314 hours, (15% of the total hours in a year), is paid to the owner of the equipment, at 9.36p. After this point, Tier 2 takes over and is paid at 2.79p. In Rushmere Nurseries’ case, the Heat Pump is likely to be running for a further 390 hours.