Thanks to all who post! I've learned so much here!! I'm building a new home in the spring and would like to heat with wood. House will be 1800 sq ft open ranch style plan with 24' ceiling peak in the 17x19 great room where hearth will be. I love the look and size of a fireplace but I'm concerned about the function and reliability of a high efficiency fireplace. After doing my homework here, I believe a wood stove would heat much more effectively. Any suggestions??