Yeah, we're remodeling right now - our design specs say heat pumps should be able to cover 100% of our load but we also have a few rarely used gas fireplaces and some space heaters in case that doesn't work out. Though like someone else mentioned, the bigger change will be reacting to power outages. A small camping generator can provide enough energy for to keep a gas furnace blower running whereas you need a very large generator to operate the heat pump.