Social Housing Retrofit

Kensa works closely with social housing providers to deliver a sympathetic programme of retrofit ground source heat pump installations with minimal disruption and major benefits, reducing tenant bills and making a dramatic impact on fuel poverty reduction.

Enfield Ground Source Heat Pump Tower Blocks Upgrade Combats London Air Pollution

Approach

By pairing Kensa’s Shoebox heat pumps with Shared Ground Loop Arrays, developments featuring as few as two dwellings, including flats, can attract 20 years of quarterly payments through the Non Domestic Renewable Heat Incentive (RHI).

The RHI income provides a return on investment for the social housing provider, or can be used to attracts external funders to own and operate the ground source heat pump infrastructure, removing the cost of the shared ground loop array from the housing association.

System Architecture

Mimicking a traditional gas framework, Kensa’s innovative Shared Ground Loop Arrays link a series of boreholes to multiple properties via an ambient temperature distribution system.

Each property then has an individual Kensa Shoebox heat pump wired to their own electricity supply, which upgrades the low temperature heat for heating and hot water within their dwelling.

Shared Ground Loop Array Kensa Shoebox ground source heat pump in housing

Read more
The advantages of Shared Ground Loop Arrays in retrofits:
  • Qualify for 20 years of income via the Non Domestic RHI;
  • Income certainty – RHI based on EPCs deemed heat consumption;
  • Split-ownership of ground arrays provides a funded option;
  • Exempt from Heat Network Metering & Billing Regulations;
  • Extremely low CO2 emissions;
  • No NOx, SOx or particulates emissions;
  • Lowest energy bills – slightly lower than mains gas, significantly lower than air source heat pumps, LPG & oil;
  • Householders able to switch energy suppliers;
  • No district heat losses;
  • Potential for free summer cooling;
  • Scalable and flexible district size can be deployed in sections as the development progresses;
  • Ultra-efficient and reliable.

Why Choose Shared Ground Loop Arrays?

Read more

Products

The Kensa Shoebox Series

Shoebox Heat Pump with plug

  • Suited to flats and apartments and smaller houses.
  • Available in 3 – 6kW.
LEARN MORE AT KENSAHEATPUMPS.COM

Hot Water Cylinder & Thermal Store

cylinder and sunamp

  • Sunamp’s super-compact Heat Battery technology fits perfectly with the Shoebox heat pump to provide a clean, efficient and cost-effective thermal energy storage solution.
  • Kensa has partnered with leading cylinder manufacturer, Advance Appliances, to design and produce stainless steel mains pressure cylinders featuring enhanced surface area coils specifically for ground source heat pumps.

Grants

Energy Company Obligation (ECO)

Ground source heat pump installations are eligible for ECO funding in retrofit social housing schemes.

ECO places legal obligations and targets on the larger energy suppliers to fund energy efficiency measures in British households.

It is in place to support retrofit efficiency works in the domestic sector, with a particular focus on vulnerable consumer groups and hard-to-treat homes.

LEARN MORE AT KENSAHEATPUMPS.COM

Under the rules of ECO, energy suppliers are obliged to fund energy efficiency improvements of their domestic customers’ buildings in three distinct areas; Carbon Emissions Reduction Obligation (CERO), Community Obligation (CSCO), and Home Heating Cost Reduction Obligation (HHRCO).

Subsidies

Renewable Heat Incentive (RHI)

Shared Ground Loop Arrays are eligible for 20 years of guaranteed quarterly payments via the Non Domestic RHI.

The 2018 RHI Regulations included an important refinement; for the first time, Non Domestic RHI quarterly payments for residential properties linked to Shared Ground Loop Arrays are now based upon the deemed heat consumption taken from the Energy Performance Certificate.

By introducing deemed payments for the Non Domestic RHI and allowing ‘split ownership’, Government has created a significant catalyst for energy efficient new build developments featuring Shared Ground Loop Arrays, with costs no longer borne by the housing provider.

LEARN MORE AT KENSAHEATPUMPS.COM
This key change:
  • Reduces capital costs (as meters are no longer needed) and eliminates all the administration burden linked to quarterly readings and submissions.  More importantly, it has prompted funders to back Kensa Utilities’ offer of ground arrays at no charge to the housing provider.
  • Eliminates the key barrier to deployment – the expense of the ground array – and allows Kensa to mimic long-standing ‘split ownership’ arrangements in the gas sector with the underground infrastructure owned and maintained separately from the heat pump installed inside the properties.  Kensa’s model sees the housing provider fund the heat pump (which is sold with the property and maintained by the purchaser) whilst the ground array is fully funded.

Typical Project Costs

Financial illustration (retrofit of 28 houses):

Based on Kensa’s fully funded ground arrays option.

Total Cost of Installation (Paid by Housing Association)£419,750
Kensa Utilities Capital Contribution (RHI-linked)£251,325
Net Cost of Ground Source Heat Pumps & Cylinders*£168,425
*Avoided costs should be subtracted from this figure. The deduction or counterfactual should include the costs of replacing the existing heating with night storage heaters or a boiler.
Read more

Funding

The below outlines the mechanism for housing providers wishing to utilise Kensa’s fully-funded Shared Ground Loop Arrays:

 

Kensa Ambient Shared Ground Array Funding Mechanism

Read more

Case Studies: Apartments

Two Storey Flats

  • Project partnership with Hanover Housing Associations
  • 23 properties and a site office over two-storey flats
  • 12 x Shared Ground Loop Arrays
  • Kensa Shoebox 6kW Twin per flat
  • Replacing old inefficient night store heaters
  • Funded by the ECO grant
  • In receipt of the Non-Domestic Renewable Heat Incentive (RHI)
  • Completed in 10 weeks
  • Winner: Retrofit Project of the Year (H&V News Awards 2017)
  • Winner: Most Innovative Retrofit Scheme (Housing Innovation Awards 2017)
SEE ALL

Low Rise Apartment Building

  • Project partnership with  Trent & Dove Housing
  • 60 properties in two blocks of three-storey flats
  • 12 x Shared Ground Loop Arrays
  • Kensa Shoebox 6kW Twin per flat
  • Replacing old inefficient night store heaters
  • Funded by the ECO grant
  • In receipt of the Non-Domestic Renewable Heat Incentive (RHI)
  • Winner: District Heating Project of the Year (H&V News Awards 2017)
  • Winner: Best Client (National Housing & Maintenance Forum 2016)
SEE ALL

Case Studies: Housing

Ground Source Review Coastline, Wheal Vyvyan 4

Sheltered Housing

  • Project partnership with Coastline Housing
  • 12 bungalows
  • 3 x Shared Ground Loop Arrays
  • Kensa Shoebox 3kW per bungalow
  • Replacing old inefficient night store heaters
  • Funded by the ECO grant & Central Heating Fund (CHF)
  • In receipt of the Non-Domestic Renewable Heat Incentive (RHI)
  • Winner: Best contribution towards the creation of a sustainable energy economy (Cornwall Sustainability Awards 2017)
  • Winner: Overall Winner (Cornwall Sustainability Awards 2017)
  • Winner: Best Renewable Energy Scheme (Regen SW Green Energy Awards 2016)
  • Winner: Sustainable Project of the Year (HVR Awards 2016)
  • Winner: Large Scale Project SW Region (Energy Efficiency & Retrofit Awards 2016)
SEE ALL

General Needs Housing

  • Project partnership with the Flagship Group
  • Mixed development of houses, bungalows and flats
  • 5 x Shared Ground Loop Arrays
  • Kensa Shoebox 6kW per dwelling
  • Replacing electric panel heaters
  • Funded by the ECO grant
  • In receipt of the Non-Domestic Renewable Heat Incentive (RHI)
  • Completed in 9 weeks
  • Shortlisted for Non-Domestic Ground Source Heat Pump Project (ACR & Heat Pump Awards 2017)
  • Shortlisted for Best Contract, National Housing & Maintenance Forum (NHMF Awards 2017)
SEE ALL

Warranties

  • 5 year warranty for the heat pump unit.
  • 2 year warranty for the controller and water pumps.
  • 2 year internals warranty.

Extended warranties are available on request.

User Engagement

Kensa Contracting offers a comprehensive information and training programme to support residents, Housing Association staff, project and scheme managers, ensuring all stakeholders are engaged and well-prepared and understand the stages of work involved.

After Care & End Users

Property’s featuring Kensa’s Shared Ground Loop Arrays will provide end users with numerous unique benefits over traditional Heat Networks with minimal after care requirements:

Lower fuel bills

GSHP’s produce 3-4kWh of heat energy for every 1kWh of electrical energy used, making them 300-400% efficient. Compare this to a typical boiler, which is just 90% efficient. Kensa’s ground source heat pump systems offer the lowest fuel costs.

Lower emissions

Because a GSHP extracts so much “free” energy from the environment, this enables CO2  emissions to be lower than any other type of heating system.

Minimal maintenance

GSHP’s don’t require annual servicing or maintenance, and have an expected lifetime of 20 years.

Energy independence

With an individual ground source heat pump in each property, homeowners are in complete control of their own heating and energy bills, enabling easy energy tariff switching and payment only for their own heat consumption.

Download End User's Guide

house purchasersFree cooling & no overheating

With heat being generated at the point of use (inside each dwelling) the ‘heat’ circulating the property is low temperature, therefore there are no heat losses from the system to contribute to overheating in risers and corridors. The low temperature system also allows for free passive cooling to be introduced, creating a comfortable living environment all year round.

Year round supply

1m below the surface the ground temperature remains a fairly constant 8-10°C all year round, ensuring your heat supply is constant and reliable; unlike air source heat pumps, which are impacted by external fluctuating air temperatures causing higher bills when heat is most needed.

Media

Find out more about Kensa’s ground source heat pump solutions for social housing by clicking the links below:

VIEW ALL

Related Content

Brochures: Social Housing Retrofit Ground Source Heating Solutions

Download Kensa Contracting’s guide to Retrofit Social Housing Ground Source Heating Solutions.


Shared Ground Loop Arrays

Kensa’s Ambient Shared Ground Loop Arrays (SGLAs) are an award-winning and pioneering approach to Fifth Generation District Heating and Cooling (5GDHC). The unique SGLA design allows property owners and developers of two or more dwellings to realise the full potential of ground source heat pumps whilst achieving easier and cheaper carbon compliance, and qualifying for…


Videos: Shared Ground Loop Array Ground Source Heat Pumps In Tower Blocks

This Kensa Contracting commissioned animation depicts the key stages for the installation of Kensa Shoebox ground source heat pumps into individual flats in tower blocks, connected to shared ground loop array boreholes. For more information on this application click here.


Case Studies: Bromford, Pleydells

Ground Source Review: Bromford, The Pleydells. Another impressive case study from the growing portfolio of collaborations between Kensa Contracting and Bromford Housing Association is this 33 unit scheme at The Pleydells, consisting of 12 flats and 21 bungalows. Shortlisted: Best Customer Impact Award (NHMF Awards 2018)


Case Studies: Stonewater Housing, Weobley

Ground Source Review: Stonewater Housing, Weobley. Stonewater residents in a development of 49 one- and two-bedroom bungalows in Herefordshire have had their heating bills halved following the installation of an innovative communal Kensa ground source heating system. Shortlisted: District Heating Project of The Year (H&V News Awards 2018)


Case Studies: Trent & Dove, Phase One

Ground Source Review: Trent & Dove Housing. Trent & Dove Housing helped 133 tenants out of fuel poverty by replacing their night storage heating with ground source heating, all within just 3 months! Discover how Trent & Dove Housing’s pioneering project reduces tenant fuel bills & generates a long term income to cover its costs. Winner: District Heating…


Case Studies: Yarlington Housing Association

Ground Source Review: Yarlington Housing Association. Kensa were approached by the social housing provider Yarlington Housing Group in late 2012 to undertake a retrofit project involving 200 of their housing stock. The project remit was to upgrade the heating systems on properties with the most vulnerable residents, installing new Kensa Compact ground source heat pumps…