I read recently about a new furnace that was developed in Canada called the Matrix. It also combines a hot water heater in the unit. It is supposed to be the most energy efficient furnace on the market. I have contacted the California rep, but been frustrated in finding anyone with any experience installing it and/or living with it. We are planning a new furnace and ductwork (attic) installation this year in a 1200 sq. ft. rancher just south of San Francisco. Instead of just going with a replacement we want to consider efficiency to go easier on the planet. Does it make sense to install a system that is so state of the art here where the climate is temperate? I would appreciate any insights.