Amongst the hubbub of Ecobuild this year I spent an enjoyable hour or so interviewing Wolfgang Feist, the founder of the Passivhaus Institut, for Show House magazine. You can read the resulting article here but, earlier in the day, I’d wandered round the German stands and gathered the thoughts of exhibitors from the birthplace of Passivhaus.…

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Dating from the 1860s, 100 Princedale Road in the Holland Park area of London doesn’t, at first glance, look to be much different from any of the other houses in the terrace. But it is. Octavia Housing is aiming to register it as the UK’s first certified retrofit to Passivhaus standards. Passivhaus buildings are designed…

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