Thank you, Mathieu and Francoise! You were excellent guests. I could not leave you a review because Airbnb changed the rules which allowed me to review guests from 1 months after they leave to only 14 days and we were on holiday for Christmas time. I will ask Airbnb if I can leave you a review because I was not aware of this change.
The heater is continually set to 65*F. Sorry you felt chilly. Had we known we could have adjusted the heater's thermostat to accommodate you better. SF's Victorian and Edwardian architecture is not insulated, unlike more modern architecture in colder climates.