I am very pleased to confirm that I am now a Certified Passive House Designer.

Passivhaus is a complete design & construction philosophy that results in exceptionally low heating and cooling demands, achieving savings of over 75% versus average new builds¹.  A building can only be certified as a Passive House if it is designed and verifiably built to stringent criteria on thermal and acoustic comfort, on air quality and energy demand.

^{1 – https://passipedia.org/basics/what_is_a_passive_house}