Infinitas Design

Renewable Energy System Design & Development


Water source heat pump – Mellerstain House

Posted on 4 September 2018


Mellerstain House, Gordon, Scottish Borders. August 2018

Infinitas Design has been engaged by Renew Green Energy, who are based in Tweedbank, to carry out a feasibility study into the potential for a water source heat pump to replace the oil boilers at Mellerstain House near Kelso.

This magnificent house was built between 1725 – 1778 and is the seat of the Earls of Haddington. Mellerstain House is open to the public although it remains privately owned by the Mellerstain Trust. Celebrated as one of Robert Adam’s finest works, Mellerstain is truly a beautiful house.

There are 6 oil boilers of various ages, sizes and conditions on the site. The plan is to replace the individual boilers with a central heat pump system providing heating and hot water to all of the buildings on the local estate including holiday cottages, café and residential flats. A new buried heat main will take heat to the remote plant rooms. The lake in the grounds of the house is planned to be the primary source of energy for the heat pumps.

Infinitas Design has carried out the site and plant survey and the energy analysis using oil deliveries to the site. We are also sizing the heat pump system and advising on how to integrate a low temperature system into the current emitters in the main house and holiday cottages.

The system will provide annual net financial income in the region of £95K taking into account income from the non-domestic RHI and oil savings. Annual carbon savings are in the region of 200 tonnes/year.


feasibility study for a water source heat pump at Mellerstain House,


At Infinitas Design we welcome enquiries from stately homes, large estate & agricultural properties, trusts and organisations such as the National Trust (Scotland and UK) and English Heritage. The implementation of renewable energy systems can help reduce the running costs and depending on the project can provide additional income.

Call 01332 854639 for more information and to discuss your project.

We cover the whole of the UK