23/11/2010 08:45:00

Close the Door Campaign: New research proves closing a shop door in winter saves up to 50% in energy usage and carbon emissions

New research from Cambridge University proves exactly how much energy is

wasted by shops leaving their doors open with the heating on.

The research found that closing a shop door when heating is being used:

  • Reduces energy usage by up to 50%

  • Cuts a shop’s annual CO₂ emissions by up to 10 tonnes of CO₂,

    equivalent to 3 return London to Hong Kong flights

  • Assists with mandatory national 34% reduction in carbon emissions

  • Enhances comfort of staff and customers, maintaining temperature at

    Chartered Institution of Building Services Engineers (CIBSE)

    recommended levels all day, even when outside temperature plummets

  • Maintains energy use at a consistent low level

  • Enables heating to be shut off long before the end of the day without

    affecting internal temperatures

  • Stops need for so-called “air curtains” over the door – among the

    greatest wasters of energy: a single one consumes 24 kWh per day. This

    is equivalent to emitting 91 kg CO₂ per week, or more emissions than a

    return Glasgow to London coach trip

Jeannie Dawkins, Director, Close the Door Campaign, commented,

“Here is the proof that it’s time for retailers to acknowledge the

massive contribution they are making to energy waste and carbon

emissions if they heat the street. By simply closing the shop door, CO₂

emissions dramatically decrease, energy bills are reduced, and customers

and staff are made more comfortable. It’s a no-brainer.”

About the study

The independent research, commissioned by Close the Door, was carried

out by Murat Basarir of the Glass & Façade Technology Research Group of

the Engineering Department at Cambridge University, over winter

2009/2010. See the full study at www.closethedoor.org.uk

under Scientific evidence.

About the Close the Door campaign

The campaign originated in Cambridge and is now nationwide. In Cambridge

initially 8 shops agreed to close their doors against energy waste; this

number has now risen to over 300 of all types and sizes. The campaign

enjoys broad cross-party endorsement and has many high profile


Close the Door

Rachel Lankester, 020 7096 1850


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