I recently installed an Osburn Stratford. It replaced a ventless LP gas log. The gas log could maintain mid-upper 70’s without an issue (this is in the main living space, kitchen and living room). I don’t know the actual BTU rating of the log, but research shows most are around 30,000 BTU’s. So far with the Stratford I have struggled to maintain low 70s, and this is only the main living area, not the entire house! The total sq footage of the house is 1900, so this should be well within what it’s capable of. The btu of the Stratford is 75,000, so it should easily be able to heat the room well into the 70s all day. I typically load it full East/West with hardwood. What the heck am I doing wrong. Burning it as hot as I’m comfortable with letting it get and it won’t go more than 2-3 hrs on a load. Also very frustrating that it won’t go anywhere near the 8 hrs of claimed burn time. Please help! No OAK installed.