Heat Pump Case Studies: Ground Source Heat Pump in 4-Bed New-build

Property type: 4-bedroom, detached new-build property in Lincolnshire

Product installed: IVT Greenline HT+ E7 ground source heat pump with ground loop buried in 2 x 50 metre trenches

Distribution system: Underfloor heating on ground floor, oversized radiators on first floor

Installation date: November 2010

Previous heating system: Gas boiler

Cost savings: Electric only property, total bill for all requirements is £91 per month

In 2010, Lincolnshire residents Mick and Liz South embarked on the first of their two new-build projects. At the time work began on their first project, the South's had not experienced renewable energy heating before but with no mains gas in their village and the high cost of oil, they investigated renewables settling on a ground source heat pump from Ice Energy Technologies.

What prompted you to investigate ground source heat pumps?
"As there is no mains gas in the village we had originally intended to install an oil boiler. However, the combination of high oil prices and the lengthy planning process meant that we decided to use the time to investigate renewable energy systems instead."

How did you find the installation process?
"The installation process was very straightforward as we chose our builder because he had previously installed one of Ice Energy's ground source heat pumps.

"Work started on the groundworks for the 2 x 50 metre trenches which house our "Slinky" ground loop in August 2010.

"To accommodate the larger ground source heat pump and the water tank rather than a traditional boiler, we changed the layout of the utility room.

"We haven't boxed in the pipes around the heat pump as yet as they are a talking point for visitors.

"On the ground floor we installed an underfloor heating system while on the first floor we have installed oversized radiators."

What has it been like living with a ground source heat pump?
"The system runs itself and is clean, quiet and efficient.

"The house has good insulation and this winter we have dropped the internal room temperature to run at a comfortable 16 degrees. We had a log burning stove installed for back up heat but so far this has been redundant! We also drop the internal room temperature in the summer to 14 degrees."

What would you say are the benefits of ground source heat pumps?
"As we see them, the benefits of ground source heat pumps are the relatively low heating bills, the low maintenance of the system and the comfortable internal room temperatures.

"There is also a good supply of hot water and even with 6 adults living here, the tank can supply enough hot water for 6 continuous showers."

What impact has your heat pump had on your running costs?
"The house has electricity only as there is no mains gas in the village. Even so, our electricity bill has only been £91 per month since installation (averaged across the year) with this amount covering our total electrical requirements."

Why did you choose Ice Energy as your ground source heat pump provider?
"For this particular project we chose Ice Energy based on the fact that they provided the best quotation. However, we were so impressed by the system that when we decided to embark on our second new-build, we only considered a ground source heat pump from Ice Energy."

What has the service been like from Ice Energy and would you recommend them to others?
"From quote to commissioning we have been happy with the good service we have received from Ice Energy including the delivery of all parts on time as promised.

"We would definitely recommend heat pumps and Ice Energy to others."

Solutions Used

  • IVT Greenline HT+ E7 ground source heat pump
  • DVB 300 hot water tank
  • Underfloor heating system on ground floor

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