I refer to your article 'What is sustainability' (AJ 5.2.98). I am amazed at the level of confusion that still exists regarding breathing walls.
Having done extensive research on this subject, I can say with some insight that there is only one envelope that makes any significant contribution to ventilation and that is the type which incorporates dynamic insulation. Please could you be more accurate with your terminology when writing about breathing walls and put an end to the perpetuation of myths.
JULIE BOULTBY Nottingham