Hi I'm new to this site. This fall I installed a osburn Stratford zero clearance. My concern is that it doesn't heat the room it's in over 70° room size is 16x16 and open to kitchen which is 18x18. Am I doing something wrong, is anybody else having these same issues. Was hoping to same money on heating bill. That hasn't happened. Also it claims to heat 2100 sq ft. Any help would be appreciated