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Renewables
GSHP savings... B
uilt in 1621, Raynham Hall is set in 5,000 acres. It is lived in by Charles, the eigth Marquess Townshend, who inherited the
property in 2010. The Hall also hosts a series of events each year including recitals and guided tours. As custodian of Raynham Hall, Lord Townshend
has to save money or make money for the Hall and, at the same time, takes his responsibility to maintain the property very seriously. At £36,000, the annual heating bill was too expensive and the boiler system desperately needed to be upgraded. Lord Townsend explains: “Originally installed in the 1950s, the existing oil boiler was old, outdated, overworked and inefficient. It had been augmented over the years by several supplementary pumps to aid heat distribution and the pumps often fought against each other. A hot water tank in the top of the building was fed by the boiler at the bottom of the house, meaning it took hours to get any hot water.” After a thorough heat loss survey, encompassing
all 62 rooms, Finn Geotherm specified 2 x Lämpöässä Eli 90 ground source heat pumps with a 3,000 litre thermal store to supply all heating for the Hall, as well as hot water for its 12 bathrooms. The ground source heat pump is fed by 10km of ground loop installed beneath grounds incorporating the old cricket pitch.
Since it was installed, heating costs at Raynham
Hall have been cut by 64% and the amount of energy consumed has been reduced by 72.6%. The installation also qualifies for the Non-Domestic Renewable Heat Incentive (RHI) scheme, which provides quarterly payments based on the amount of heat energy used for 20 years. The system will pay back in around seven years. Lord Townshend says: “Results for the heat pump
so far have been extraordinarily good. The house is now very comfortable. Finn Geotherm could not
Grade 1 listed 17th-century property, Raynham Hall near Fakenham, Norfolk, has invested in a new renewable energy heating system to cut costs and deliver more effective heating. The project, which won the HVAC Initiative Award at the HVR Awards 2019, was completed by renewable heating expert Finn Geotherm
have been more helpful – they wanted to deliver a heating system which would work with and enhance our everyday lives and this does exactly that. You put up with a lot when you live in a large house but there really is no need to go without adequate heating and hot water. It’s a huge problem we’ve been living with which has just disappeared. “This is the sort of larger period property that
everyone tries to tell you can’t be heated with a heat pump but my ground source system proves otherwise. I am delighted to be using modern technology to heat my 17th Century home – it is the perfect combination.” Guy Ransom, commercial director at Finn Geotherm says: “Raynham Hall is an ideal illustration of the massive impact a heat pump can have in older properties. One of the unique features of this ground source installation is that you can barely see it. Working with Natural England and archaeologists to monitor the project, the careful design and installation of our heat pump system has ensured that the exquisite architecture of Raynham Hall remains exactly as it was but, for the first time in its long history, the Hall is now properly heated.” The current RHI scheme is set to end in March 2021 for new applications.
PILOT SCHEME TARGETS CLIMATE EMERGENCY C
roydon Council has commenced a pilot scheme with Kensa Contracting to install a low-carbon fifth generation ground source heat pump system for its residents that will cut the cost to residents and the environment. The ground source heat pumps at the council-owned 10-storey block in
New Addington will cut carbon emissions, help improve air quality and save up to £300 per home per year on more than 40 households’ heating bills. The project comes after Croydon Council declared a climate emergency this summer, and aims to contribute towards a local target of cutting the borough’s carbon emissions by 34% by 2025. Kensa Contracting will be undertaking the ground source heat pump
installations, following on from an award-winning tower block retrofit scheme in Enfield, featured in the Mayor’s London Climate Action Week. The 44 flats are the first in Croydon to have ground source heat pumps
retrofitted, replacing the existing electric storage heaters. An individual Kensa Shoebox ground source heat pump (pictured) will be installed in each flat, connected to an ambient shared ground loop array. The ambient nature of the heating distribution system
will prevent overheating of communal areas, whilst the individual heat pump in each flat will provide the tenant with independent control and the freedom to switch fuel suppliers for the cheapest energy tariff. As well as saving each home between £260 and £300 a
year off their bills, the ground source heat pumps will cost less for the council to maintain than storage heaters. The replacement of the tower block's electric storage heaters with Kensa’s
ground source heat pump system expects to cut lifetime carbon emissions by the equivalent of a 242,317-mile car journey; or driving around the world 10 times. The average night storage heater produces approximately 2,001kg of carbon dioxide per year, compared to the new ground source heat pump system that produces around 645kg per year. Kensa expects to complete the works by spring 2020, timed to coincide with an 18-month, £3.2 million refurbishment to the block including new insulation, a replacement roof and windows, landscaping and new parking. The £700,000 heating system will be funded through the council’s ring-fenced housing budget and via energy credits from energy regulator Ofgem. Councillor Alison Butler, deputy leader and cabinet member for homes and gateway services, said: “Many Croydon tenants find paying their winter fuel bills a struggle, so this pilot scheme and wider refurbishment will make a real difference by ensuring their homes are warmer, more energy-efficient and cheaper to run.” Councillor Stuart King, cabinet lead for environment and
transport, said: “Making Croydon more sustainable is a key council priority, and by both cutting carbon emissions and
residents’ heating bills, this project underlines our commitment to improving the environment.”
www.heatingandventilating.net
December 2019
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