Kensa Present the Benefits of Using Ground Source Heat Pumps for Housing Association, Council and Local Authority Retrofit Schemes

By Kensa Engineering, PRNE
Tuesday, February 1, 2011

EXETER, England, February 2, 2011 - Ground source heat pumps ( are a
compelling technology for social housing ( providers looking to
develop or upgrade properties to meet more stringent regulatory requirements.
Kensa is a renewable energy manufacturer with an objective to remove any
'mystery' linked to heat pump technology and the installation of a heat pump
system (

Now is the time for local authorities and developers to start planning
the roll out of ground source heat pumps to ensure their existing housing
stock can benefit in time for the next heating season. The primary benefits
of a ground source heat pump ( include:.

- Reduction in fuel cost for tenants, especially in off gas areas,

- Reduced maintenance cost for owners,

- For new builds the use of High Temperature GSHP's can provide 100% of
the heating and hot water demand of the property which can significantly help
towards achieving Code 4.

- Large Carbon Savings, as well as…

- The potentially lucrative income from the Renewable Heat Incentive

Renewable Heat Incentive (RHI) payments are to be claimed by, and paid
to, the owner of the renewable equipment. The RHI will be available to
householders, local authorities and social landlords as well as the public,
industrial and commercial sectors. It has been confirmed that ALL
installations commissioned after 15th July 2009 will be seen as a "new
installation" and will be eligible for the RHI. To find out more about the
anticipated RHI payments (, visit
the Kensa Engineering website and download the RHI Factsheet.

Despite all of these benefits, ground source heat pump systems,
particularly the design of the ground arrays (, need to be handled
correctly and this requires some expertise even if the subsequent
installation is very straightforward.

Without doubt, the most challenging element to any project is the
'application engineering' to ensure the correct sizing of the ground arrays,
heat pump and distribution system SAP reports ( can be used to
size the heat pump but determining the depth of the borehole, or the length
of any horizontal 'Slinky' trenches (, is far more
demanding, partly because of the UK's huge geological diversity.

Fortunately, there are software programmers, and an emerging band of
specialist designers with background in thermo-geology, who can provide a
design service to ensure the drilling contractors are not charging for
unnecessary borehole (

In addition, many drilling contractors are beginning to specialise in
geothermal drilling and are recognising that they need to also provide a
trenching service (to link the borehole to the manifold location on the
building perimeter) and a concrete platform to accommodate the heat pump
itself. In some cases, innovative contractors are offering to install the
heat pump leaving a separate contractor to perform the internal works.

Certainly, the installation of a heat pump is straightforward and can be
performed by any contractor capable of installing a gas boiler. In order to
comply with grant requirements, the installation must be handled by an
MCS-accredited contractor, a status not held by many plumbers. Thankfully,
Kensa is an MCS-accredited installer so can work alongside any local
contractor to provide a complete service via our remote commissioning

Before anyone can commit to specifying a ground source heat pump, it is
important to establish whether ground source is a feasible option. This can
be established by answering a few simple questions:-

1. Is there sufficient land available to install the required ground

Energy for the heat pump must be extracted from the ground. In most
social housing applications the external space is limited, so it likely the
borehole ( route
will be used. Each property will need access to an area suitable for locating
the boreholes, and must be accessible to digging machinery. Geothermal
Borehole drilling is a specialist discipline; Kensa can make recommendations
for suitable contractors if required.

As the mobilization cost of drilling rigs is a high proportion of the
total installation cost, it is generally most cost effective to do a number
of properties in a single phase of works, economies of scale will reduce the
cost per property the more bore holes are drilled.

2. Is the building going to be well insulated?

Since ground source heat pumps produce a lower temperature heat than
traditional boilers, it's essential that all reasonable fabric improvements
are made in terms of insulation and draught proofed for the heating system to
be effective. Download the Kensa Factsheet which outlines the importance of a
well insulated building (

3. What sort of heating distribution system is currently in place, or
what heating distribution system is proposed?

Generally in a retrofit scenario the cost of UFH is prohibitive therefore
radiators have to be used. Heat Pumps can work effectively with radiators
proving the system is designed with the lower flow temperature, circa 50
degrees C. Kensa heat pumps can also be configured to provide all of the
heating and domestic hot water
( needs for a property.

4. What level of financial commitment can be given to installing a ground
source heat pump?

Costs of installing ground source heat pump will depend on the size of
the property and the insulation measures in place and the volume of house to
be installed.

For a budget price for a retro fit scheme, please submit a property list
(, along with floor areas,
and ideally SAP calculations. Alternatively call the Kensa sales office on
+44(0)1392-826022 to discuss.

Running costs will depend on a number of factors as above, and also the
usage behaviour of the tenant. If the heat pump is used to replace oil, night
storage, or solid fuel. The running cost saving to the tenant will be
significant, however, some education will be required to ensure they use the
system effectively and retain the greatest running cost saving.

One it has been decided that a ground source heat pump is a feasible
option for a project, the benefits and key issues ( to installing a
ground source heat pump should be explored. For further information, follow
the below links.

    - Find out more about the Benefits of installing a Kensa Ground Source
      Heat Pump (

    - Find out more about the Key Issues which must be considered for any
      Ground Source Heat Pump Application.(

    - Download the Complete PDF Guide to Ground Source Heat Pumps for Social
      Housing Providers (

    - View our Case Study - New Linx Housing Association - Lincolnshire - 225
      Retrofit Social Housing Properties (

    To find out more about Kensa Heat Pumps, click on one of the below

    - How do ground source heat pumps work? (

    - Information on typical energy costs and CO2 emissions (

    - The Kensa Heat Pump Product range (

    - Find out about the different energy sources that can be used.

(Due to the length of the above URLs, it may be necessary to copy and
paste the hyperlinks into your Internet browser's URL address field. Remove
the space if one exists.)

Notes to Editors

About Kensa Engineering

Kensa Engineering Limited is a Truro-based manufacturer of ground source
heat pumps and related accessories. Established in 1999, Kensa supplies the
UK's widest product range to satisfy all residential and commercial

Accolades for Kensa have included the 2008 Ashden Award for UK Business
of the Year, the 2009 Housing Excellence Award for Product of the Year and
the 2009 Corgi Live Green Manufacturer of the Year award.

Issued on behalf of:

Kensa Engineering Limited

Mount Wellington

Truro TR4 8RJ

For Media Enquiries: Claire Hottinger, Marketing Executive +44(0)1392-826024

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