A donation of £70 was made to the Cambridge Carbon Footprint organisation, who owned the camera, and loaned it to the LGEG in return for a donation. All the money donated by householders was passed on the Cambridge Carbon Footprint without any deduction for "expenses". The loan of the camera was organised by the SPEP group within South Cambs District Council.
The thermal imaging camera showed up heat losses from concrete lintels over windows, where older buildings had lintels that bridged the cavity. It showed the heat loss around the edges of some double glazed window panes, where the aluminium spacer between the two sheets of glass conducted heat from inside to outside. The new "A" rated double glazing windows have an insulated spacer, instead of aluminium, as well as modified glass that reflects heat back into the building. The camera detected heat being lost though air vents that were open, which they have to be open at times to allow adequate ventilation. An example of the old style "Crittal" metal window frames revealed how much heat was conducted to the outside through the metal frames - such frames should be replaced as a matter of urgency!
The thermal camera detected heat losses around the outside edges of some houses with under floor heating, and the size and shape of radiators inside poorly insulated walls (mainly wattle and daub construction). Wood burning stoves and AGA stoves can appear to have considerable heat losses up the chimney stack due to exterior surface temperatures between 20 and 30 deg C on the chimney, when the air temperature was only 4 to 7 deg C at the time of measurement.
In the Little Gransden Village Hall, the warm air rising from the convector heater resulted in air at 33 deg C at ceiling height when the room thermostat was set at 21 deg C. Cold draughts of around 9 deg C were entering from poorly insulated ceiling at 11 deg C in the stage area and the Committee Room. Aran Services are being employed to insulate the ceiling above the stage area. Although the ceiling of the Reception Area is insulated, there is no insulation above the loft floor, and the loft space is open to the atmosphere around the edges of the corrugated roof and wall panels. This cold air was descending into the Main Hall by the loft door that could not be shut fully - this has now been rectified as a matter of urgency! In the kitchen of the Village Hall, there had been a damp area in one corner that started to show signs of mould. This area is a cold spot and immediately above the hot water boiler. The mould has now been removed, but better insulation and ventilation when water is being boiled, is required.
The Solar Photovoltaic Panels at 15 Main Road have now generated just over 1272 kWh of electricity since they were installed on 28th May, and 9th January. Unsurprisingly, the many cloudy and short days has resulted in low amounts of electricity being generated in the last month. Daily generation from only 0.15 kWh to 4.47 kWh were recorded over the Christmas to New Year period.