The historic Soulton Hall in Wem, Shropshire, has caught up with heating technology and installed two Stiebel Eltron ground source heat pumps to replace the traditional fossil fuels it has previously used.
The new ground source heat pump system is set to save the Elizabethan country house £10,000 per year by heating 30 rooms and the coach house with green hot water.
Hotel owner, Tim Ashton, says: “We are delighted that the heat pump system has been commissioned and is now up and running”.
“The heat pump is taking the constant 10°C temperature under one of our fields to meet all our hot water and heating demands.
“Ground source was always going to be a great option for us as we have plenty of space for collectors – the ground loops here are under an area of 3 acres. We were also able to easily convert the former log store into a plant room.”
The pump is powered in part by a mixture of ground mounted solar PV arrays as well as small arrays fitted to various outbuildings which have an overall output of 50kW. Back-up power is accounted for by a buffer tank which stores additional energy supplies.
The project has come in at around £70,000 to install as well as another £10,000 for unforeseen costs such as land drainage measures.
However, with savings of around £4,500 per year on fuel with the Renewable Heat Incentive (RHI), the system should pay for itself in 8-10 years. Following this will be another 10-12 years of RHI payments, making heating the country house much cheaper. Costs will increase and level out once more when the RHI payments cease.
Tim explains that ”In the long run this will still be an expensive place to heat, but what we have done is install a system which will eventually pay for itself and then protect us from future fuel price rises.”
Director Bryan Jones says:
“This has been a fantastic project to work on. The hall itself is stunning and the site really lends itself well to green energy.
“As there was plenty of ground space available, we decided to go with a twin ground source heat pump system, with a Stiebel Eltron WPF27HT heat pump working alongside a Stiebel Eltron WPF35 heat pump.
“The WPF27HT is providing heating and hot water, while the WPF35 is being used for heating only – with a total output of 62kW. We designed the system so that in the summer months only 27kW is needed, reducing energy usage and costs.
“The WPF27HT unit also pasteurises the 1,000-litre DHW cylinder instead of using an immersion element, which increases the overall efficiency of the system.
“We laid 3,800m of ground loop with a pre-assembled manifold chamber which is 90m away.”
Image by Rgbnhttagsground source heat pumpold buildingssoulton hall