Our Hurricane Furnace continues to give us issues. We have worked with Marcello in BC and two other factory trained repairmen here in Bellingham to solve a flame out issue that emerges in the coldest weather in the PNW. It has been frustrating to the point where we are considering replacement with a Kabola. What size heater (in btu's) is typically installed for this size boat to use in the winter and cold weather? Thanks for any information you might be able to provide.