So I have decided to buy another stove in the spring or maybe sooner. I am really leaning towards the Harman p43 or 61 but I the Quadra Fire looks nice and has some nice features. I live in mountains SW Pennsylvania where is does get down to -15 and sometimes colder, My house was built in 1915 and about 1800 sf and has new windows and pretty good insulation. Right now I have a kozi Previa 40k btu and it does the job but I want to move that to the basement so I can completely run on Bio, and not oil! I have both Harman and Quadra fire dealers with 30 mintues, and dealer support is great with both and Close!! any help is Greatly appreciated and Thank You in advance!!