MyPassivHaus.uk will document my attempt to get a 1930 house, from its existing state, with solid walls, cheap double glazing, poor roof insulation and a north facing "conservatory" upto Passiv Haus standards. Ideally, I want to be able to reduce the heating bills to almost zero.

We are still very early days and investigating all the options. Money is also quite tight, so it won't happen all at once.