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These days we all worry about how much energy our homes use. The rising cost of energy bills and our impact on the environment mean we want to keep our consumption to a minimum. One of the best ways to do that is to choose thermally efficient products that keep warmth in and cold out, saving money and emissions.

When it comes to thermally efficient doors, a Walker Windows composite door is the best choice you can make.

The photos here show the thermal efficiency of each of the doors we tested. The darker the blue, the less heat is being lost. The reds and greens – the predominant colours on the timber door – indicate high heat loss.