Enterprises that need to store large amounts of goods at temperatures well below the freezing point of water often install large walk in freezers on their premises. These large freezers are capable of keeping whole rooms full of these goods, usually foodstuffs, at very low temperatures. There is just one downside: cooling requires a lot of energy. It is therefore very important that no outside heat leaks in. To make sure that the freezer's insulation is working properly, thermographers inspect the insulation material with a thermal imaging camera.
Fundamentally, inspecting cold rooms, walk in freezers and other types of large commercial refrigeration units is in essence very similar to building insulation inspections, where we detect heat leaking from the outside of the building to the cooler inside air (on the condition that we have a temperature differential of around 10°C)
