A door manufacturer will be warning housebuilders about the importance of air permeability at this year's show. In the context of recent trends and new legislation, Manse Masterdoor is highlighting the importance of air tightness in a property for reducing the cost of energy bills for the house buyer. Where a door seal is key in retaining heat in the property, many door makers quote conduction (calculated by u values) as the key factor but the exhibitor claims the most important aspect for reducing wasted energy is air tightness.

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