The problem is at the back of the fridge where there is a large amount of foam insulation, which is highly flammable.

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The entire process takes place in near-freezing conditions and such plants are usually built with large amounts of flammable foam insulation to maintain a constant temperature.

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Energy efficient appliances and windows, foam insulation, heating and cooling systems powered by geothermal, solar panels, and wind mills have all quietly begun invading new construction, particularly in the luxury end of the market.

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Less successful but still profitable is Pittsburgh Corning, a joint venture with PPG Industries, that makes foam glass insulation and architectural glass blocks.

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Most of the victims died after inhaling the toxic smoke produced when ceiling insulation foam caught fire.

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All of the 241 victims were found to have died of asphyxiation as toxic fumes from the insulation foam quickly spread through the club.

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