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Last edited 27 Oct 2021
Treated Floor Area
LETI Climate emergency retrofit guide, How existing homes can be adapted to meet UK climate targets, published by LETI in October 2021, defines Treated Floor Area (TFA) as: 'The internal area of a dwelling less the footprint of internal walls and other uninhabitable spaces. Measured on all habitable floors. Typically this is around 90% of the Gross Internal Area.’
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