Thank you for your response. Natural gas is unavailable in my area.......unfortunately, but I can obtain propane fired units. Are they more heat efficient and economical than an electric furnace, baseboard heating (electric), and/or a wood burning stove? The inside of my home cools to a "lovely" 37 degrees. Since I recently purchased this home, not knowing what I was getting into and a heavy winter having segwayed into our area..........was reality. Thank you. Any more and continued suggestions are much appreciated.