In Seattle as well. I kept my oil furnace and added mini splits to each room.
What helped the most for my old house was attic insulation. I spent around $700 to buy blown-in packs (and got free machine rental) and got my attic to around R-40. I'm able to set my thermostat 5 degrees higher without any change to my energy bill.
What helped the most for my old house was attic insulation. I spent around $700 to buy blown-in packs (and got free machine rental) and got my attic to around R-40. I'm able to set my thermostat 5 degrees higher without any change to my energy bill.