Page last updated at 14:49 GMT, Tuesday, 16 September 2008 15:49 UK

Image shows energy-efficient city

A thermal image is to be taken of every home and business in Coventry to look for properties wasting energy.

Blue coloured buildings indicate good heat storage, but red shows where heat is escaping and owners may be informed about better insulation.

Councillor Nigel Lee said it will be taken in the winter as cold weather will give a more accurate image of the 120,000 buildings in the city.

It is not yet clear how the public can access the information, he added.

'Government grants'

"We will take the picture at about 1am and then match it to the council's street plan to produce a range of thermal output in the city," he said.

"There are four stages: blue is good, green is average, yellow means some changes might need to be made and red is bad.

"The age of some buildings need to be taken into account and the cost of insulating them - for example a tower block could cost millions to insulate.

"Once the map has been produced, some residents, like single occupants and the elderly, whose homes are losing a large amount of heat, will be made aware of government grants to insulate their properties."

He added that the council hoped to introduce hand-held thermal imaging cameras to officials who can show residents whether their homes are energy efficient on a one-to-one basis.

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