Edwardian flats and Victorians in the Sunset and the Mission were finished with plaster, single-pane glass, and a floor or wall furnace. Cooling is rare. A heat pump that can take the damp rooms without ripping the plaster is the usual fit.
Ask for a heat pump sized to keep your home warm on the coldest usual winter day. The price uses the CA and utility programs your address qualifies for. No sales call, no information sold, no pressure.