Gorse Cottage UK with EDGE PRO
Gorse Cottage UK with EDGE PRO

Gorse Cottage is a country home near Boston (Lincolnshire) whose original core dates back to 1844; it was subsequently expanded to its current layout, featuring five bedrooms and a residential annex (guest house).

The Challenge

The property was heated by a 40 kW LPG boiler with operating costs of approximately £5,500 during the fall and winter alone.

The goal of the project was to replace the fossil fuel boiler while minimizing structural work and modifications to the existing distribution network.

System Solution

A room-by-room heat load calculation revealed an actual design heat loss of 14.58 kW, making it possible to avoid oversizing the new heat pump and to select a unit with a nominal capacity of 16 kW.

The solution adopted was Clivet’s EDGE PRO, a reversible monoblock heat pump for outdoor installation using R290 (propane) refrigerant, capable of supplying water at temperatures up to 80 °C, operating with A+++ seasonal efficiency (at 35 °C), and functioning down to outdoor temperatures of -25 °C.

Results

Accurate sizing based on a thermal load analysis made it possible to replace the previous 40 kW boiler with a high-efficiency Clivet EDGE PRO heat pump of just 16 kW, capable of meeting the building’s entire demand for heating, cooling and domestic hot water, resulting in reduced running costs.

The high flow temperature provided by the EDGE PRO — set at 54 °C rather than the standard 45 °C — meant that 16 of the 19 existing radiators could be retained, limiting the replacement to just 3 units and avoiding invasive work inside the property.

The installation of EDGE PRO also enabled the property to qualify for the UK government’s Boiler Upgrade Scheme (BUS) grant for the decommissioning of the LPG system.

Finally, the design of the EDGE PRO heat pump and its quiet operation were highly appreciated by the owners.

Gorse Cottage UK with EDGE PRO installed Gorse Cottage UK with EDGE PRO installed

Clivet units installed

  • 1 EDGE PRO 16 kW (high-temperature reversible monobloc air-to-water heat pump with R290 refrigerant)

Key players

  • Clients: Simon Wardle & Diane Saunders
  • Distributor: Ultimate Renewables Supplies