Trent & Dove Housing – Ground Source Heat Pumps
Trent & Dove required a partner to deliver ground source heat pumps to 193 of their rural, off-gas properties comprising 1-2 bed bungalows, which were being heated by night storage heaters.
Remove electric storage heaters & install GSHP, associated wet heating system & controls
Trent & Dove Housing
22 May 2015
- Summary of works
• RHI & ECO funding
• Resident cost and CO2 savings
• Award-winning product
• Long-term partnership with client
Trent & Dove Housing are a Midlands-based Registered Provider offering affordable housing for rent and part (shared) ownership across East Staffordshire, South Derbyshire and North West Leicestershire.
Trent & Dove required a partner to deliver ground source heat pumps to 193 of their rural, off-gas properties comprising 1-2 bed bungalows – the majority of which were occupied by elderly/vulnerable residents. The properties, which are located across the Burton-upon-Trent area, were being heated by night storage heaters.
Trent & Dove – an organisation passionate about combating fuel poverty – wanted to replace the heaters with install ground source heat pumps (GSHP), a retrofit heating upgrade that would minimise fuel emissions, keep residents warm, and reduce costs.
J Tomlinson, who have been working with Trent & Dove Housing for over 10 years on various other schemes, were appointed to install the GSHPs across 15 sites.
GSHPs provide an excellent alternative to electric storage heaters in rural, off gas properties. A well designed system provides the lowest running cost of any heating system – because it uses a small amount of electricity to transfer a large amount of naturally occurring heat from the ground.
As J Tomlinson is a MCS accredited installer, Trent & Dove qualified for the Renewable Heat Incentive as a result of the project.
J Tomlinson Solution
Ground Source Heat Pumps – how they work
- A GSHP system consists of three elements;
- A ground heat exchanger, which collects heat from the ground
- A water-to-water or water-to-air heat pump, which raises the heat collected to a useful temperature and transfers it to the house
- A heat distribution system which provides the heat to the house (e.g. underfloor heating).
The ground heat exchanger loop (the network of pipes pumping the water underground) can be fitted horizontally or vertically. The vertical system was implemented across all fifteen sites this project, with a view to minimising disruption to residents.
J Tomlinson was employed to supply and fit all materials for the heat distribution system, in this case a full wet central heating system.
Prior to commencing works, J Tomlinson visited each individual property to complete a full survey, identifying the specific requirements of each home, which in turn informed the final design of the heating system to be installed.
The “ground source heat network” design sees a ground source heat pump and new radiator-based heating system installed inside each dwelling and connected to a network of communal ground arrays on each site, typically with every pair of bungalows sharing a communal borehole.
The Ground Source Heat Pump system installed within each property’s airing cupboard provides 100% of the heating and domestic hot water requirements.
Resident cost and CO2 savings
Within three months of the first installation, residents’ energy bills and CO2 emissions were halved, with Trent & Dove reporting an improvement in resident health and wellbeing. A survey undertaken almost four years following installation revealed that the system continues to be highly popular with residents as a result of its ongoing benefits.
RESIDENT COST AND CO2 SAVINGS – following completion of the project, residents reported annual fuel savings of between £350 and £500, as well as an average saving of 49 tonnes of CO2 per property
IMPROVED HEALTH AND WELLBEING – as well as helping residents to save money, the efficiency of the GSHP system compared with the previous system is highly effective in keeping residents warm and reducing fuel poverty, helping to improve health and well-being
LONG-TERM ROI FOR HOUSING PROVIDERS – the unique combination of ECO2 funding and the Non-Domestic RHI provide a viable and attractive opportunity for social landlords to tackle the issue of fuel poverty in off gas grid housing stock using Ground Source Heat Pumps. The £2.2m RHI and upfront ECO income provides Trent & Dove with a long-term return on their investment
EXTENSIVE CLIENT KNOWLEDGE – as an existing partner of Trent & Dove’s, J Tomlinson commenced the project with a detailed understanding of the client and their long-term goals
LONG-TERM RESIDENT SATISFACTION – a survey undertaken almost four years following installation revealed that the system continues to be highly popular with residents as a result of its ongoing benefits
£1.8 million – Client investment
£2.2 million – ECO & RHI Income
Only 5% VAT payable on the whole project
95,000kwh expected annual electricity savings
Residents savings per annum = £350 – £500 annual fuel savings reported by residents
49t CO2 annual fuel savings reported by residents
Tackle fuel poverty- reduces fuel bills in off gas stock and reduces excess winter deaths