I have a relatively small room; approximately 14 x 13. (Or round it up to 15 x 15 as I don't remember for sure). I have an existing HVAC central air system; however, the cold air does not reach this front room. This room gets super hot in the summer and I'm thinking about adding a window unit...

Got a new furnace, and my checking shows its over-firing by about 25%. Called Northwest Natural Gas. I'm told the energy content is ~1020-1040 BTU/ft^3 The furnace is rated 60,000 BTU input, and there is a section about checking furnace input and there's a chart that shows at 1040BTU/ft^3, it...