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Thermal imaging cameras are becoming more popular as homeowners seek to cut their carbon emissions and reduce heating bills. Last year, Jamie Matthews, a software company owner, bought a thermal imaging camera costing approximately £160. Using the camera’s images, Matthews was able to detect areas of heat loss in his home, such as a poorly insulated loft hatch and gaps in external walls. He was able to seal some of these himself but also requested a professional heat loss survey before embarking on any major renovation work.
Local councils are offering residents free loans of thermal cameras, leading to increased uptake, particularly given that using these devices is a fun way to identify potential problem areas, says Matthews. However, the use of thermal cameras can create confusion over how to interpret the images produced, especially in relation to reflective surfaces or solar-warmed walls. Expert users say thermal imaging is a good starting point for understanding heat loss, but should be accompanied by independent expert advice to avoid the risk of “retrofit anxiety”. Ronita Bardhan of the University of Cambridge adds that if homeowners undertake insulation work this must be done with care, as its improper installation can cause damp and mould.
Phil Steele, Future Technologies Evangelist at Octopus Energy, agrees that caution is necessary when using thermal cameras. The camera can make it appear that the corners of a room are very cold; however, this is merely a reflection of air circulation in the areas rather than an insulation issue. Last winter, Octopus Energy loaned out its thermal cameras around 3800 times, and Steele says these devises “are not silver bullets; in fact, they are just one small part of adopting an energy-efficient approach to your home”.
Thermal cameras use a sensor that detects infrared light and translates it into a visual image. CSE, a charity previously known as the Centre for Sustainable Energy, has highlighted the publication of a detailed user guide from the National House-Building Council on how to use thermal cameras, while North Somerset Council provides thermal cameras on loan via local libraries. Library of Things, a community-focused organisation, rents out these devises to homeowners and a simple training video is available on the Flir manufacturer company’s website
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