I am currently in the midst of remodeling a space in an older home. It is a Craftsman's Cottage and I am renovating the second floor, (it was previously a large open attic space). I am putting in a master bedroom, bathroom and walk-in closet. Total floor space will be approximately 600 sq. ft. The majority of the ceiling is sloped but the highest point will be 10 feet. Insulation will be a spray-in icynene foam. The bath and closet constitute about 150 sq. ft. of the total floor space. I am having some issues as to heating this space. The original plan was to use a Rinnai gas unit in the bedroom and electric in the bath, but the cost of piping the gas unit has become an issue, (around $2000 just for the piping). I am looking for ideas on alternative heating methods. Any ideas would be helpful. I can't pull off the existing heating system as it will not handle the load, (it's a forced hot air system).