Underfloor heating for a barn conversion in Hertfordshire

Underfloor heating for a barn conversion in Hertfordshire

Case Study Details

Underfloor heating for a barn conversion in Hertfordshire

This large extensive barn conversion took place in Hertfordshire. This major renovation project saw the owner’s completely transform the building from a cold barn to a modern energy efficient home. Mr Tansley contacted Better Planet for a free site visit where we explained the importance of sizing a heat pump correctly and analysing the heat losses to ensure the ground source heat pump would work correctly and efficiently. This analysis was carried out and gave Better Planet the correct information to advise him on the correct system and layout required.

Location: Hertfordshire

Project Summary
  • A heat loss of 11.9 kW at a design outdoor temperature of -2°C
  • Kensa Twin Compact 12kW Ground Source Heat Pump
  • A 300ltr litre hot water cylinder
  • A underfloor heating design flow temperature at 40°C
Services provided by Better Planet
  • A room by room heat loss calculation as required by MCS
  • Design documented in a Project Planning Pack including
    -Mechanical schematics
    -Wiring Diagrams
    -Location of main components
    -Foundation drawings
  • Supply and installation of the heat pump, control unit, hot water cylinder and required plumbing items.
  • A full underfloor heating design, supply and installation.
  • MCS certificate and Handover Pack.

The new system is made up of a Kensa Twin Compressor Compact 12kW ground source heat pump, 300ltr Advance Appliances hot water cylinder and four 50m slinky ground loop collectors. Better Planet designed and installed an underfloor heating system that would work to maximise the efficiency of the heat pump and allow for lower running costs than a conventional heating system.


The system is now fully up and running. As well as providing a consistent supply of hot water and comfortable heating. Mr Tansley is now registering his interest in the Renewable Heat Incentive (RHI) where is it is estimated he will earn approximately £17,000 over 7 years.