Expression of Interest

The National Trust is seeking expressions of interest from ground source heat pump installers for the design, supply and installation of a 165kW heat pump system at Kingston Lacy Estate.

There will be four work packages:

1. Design, supply and installation of GSHP system.
2. Construction of new build plant room.
3. Upgrade of main incoming transformer.
4. Monitoring and modification of mansion heating distribution system.

The preferred contractor shall be responsible for all four work packages. Detailed performance and specifications are currently being prepared and will be issued in January 2022 with work packages 1 - 3 being completed by December 2022 and work package 3 by December 2023.

The ground source heat pump system will consist of an array of 36 vertical boreholes located in the overflow car park of Kingston Lacy, connected to two high temperature heat pumps in monovalent configuration capable of delivering 165kW with a maximum flow temperature of 60 degrees. These will be located in a new build plant room and connected to the existing conservation and comfort heating circuits in the existing mansion boiler room. The contractor will be responsible for the decommissioning and removal of the oil storage tank and existing oil boilers.

The NEC3 contract will be awarded on an competitive tender basis with a selection criteria based on 30% cost, 50% quality, 20% delivery.

An open day will be announced in the new year to allow bidding contractors to attend site and gather all necessary design information required to prepare and submit a tender.

To register your interest in this opportunity or to find out more information please email the SW renewable energy project manager: owen.griffith@nationaltrust.org.uk