Costa Eco Pod

Costa Coffee’s first net zero energy retail building which it hopes to roll-out to other stores.
Climate Change Mitigation Advancing Net Zero Case Studies

Member written

Project Overview

The project set out to deliver the first net zero energy retail building for Costa Coffee. This has been achieved with agreement between all of the stakeholders involved in the scheme to provide a basis from which to replicate across new retail projects. Collaborative working frameworks were set up between landlord and tenant, architects, mechanical and electrical engineers, and the building contractors who all worked together to achieve net zero.

This scheme formed the basis of an approach that could be replicated and has been rolled out to a second site in Swansea, with other sites planned for the future.

Location

Telford

UK availability

Yes

Date added

Jun, 2021

Project partners

Costa Coffee, Zero Energy Architecture, XCO2, Savills

Project status

Completed 2015

Project size

158 sqm

Links

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Case Studies submitted by

XCO2 Energy
Savills (UK) Ltd

Highlights

  • Net zero for all regulated energy loads
  • 25% reduction in energy and carbon over standard Costa Pods
  • 8 weeks faster delivery than standard building
  • Building emission rate (KgCO2/m² per year) = -21.98
  • Energy Performance Asset Rating = A+ (-20)

The building design was established following detailed analysis of 3 other in-use Costa sites. Energy analysis across 12 months was generated which informed how energy was being used in existing buildings.

Approaches Used

  • The design was based on providing a new retail building that could be delivered for the same cost as a standard retail building and also provide a means of performing at net zero. The building also integrates a cross-laminated timber (CLT) structure with low embodied carbon.
  • The building design was established following detailed analysis of three other in-use Costa sites. Energy analysis across 12 months was generated which informed how energy was being used in existing buildings.
  • The design approach included a fabric first design methodology with a highly insulated building envelope to passively reduce heating and cooling This approach was validated via extensive thermal modelling.
  • The building integrates solar shading and a hybrid ventilation system (Breathing Buildings rooftop units) to further reduce demand.
  • The project was designed to accommodate a roof mounted 26.5kWp PV array which has been integrated into the roof construction. This system generates on average 22,000kWh per year.
  • The site has a submetering system installed which details all the key electrical circuits allowing for separation between regulated (Part L) and unregulated energy.
  • Following completion, energy use (as well as internal temperature and CO2) was monitored and reviewed in detail as part of post occupancy work to fine tune the building. During this process, the relevant stakeholders were engaged to rectify any issues unveiled by the data review, which ensured the building started operating as expected from early on.
  • Post occupancy energy analysis carried led by XCO2 has confirmed the building operated as a net zero energy building in regulated terms, whereby the energy generated by the PV array exceeds the energy used by Part L end uses (heating, cooling, hot water, lighting and auxiliary).
  • Post occupancy data was also shared with the wider team to continue discussions on potential options to reduce regulated and unregulated energy use in the store as well as other existing or future stores in the Costa Coffee portfolio.

For Further Information:

Please contact: Nuno Correia nunoc@xco2.com

Related members

XCO2 Energy

Savills (UK) Ltd

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