Hi I spend winters in our house in the hills of a high plateau area of Mexico - Oaxaca. We have high ceilings and poor insulation in a house made of cinder block, perhaps 12-1400 sq ft including bedrooms. Nights for 3 months are in the low 40's - down to maybe 37 degrees on coldest nights. Days of course, warm and sunny. No one down there uses any heat, but we prefer not sleeping in socks and sweat clothes under piles of blanket. I'm considering a Drolet Myriad II. I don't have the knowledge or experience to know what they mean by good for "900-2100 sq ft".... am worried about overkill regarding stove size, as 40 degrees is hardly a deep freeze. Would like house to get to 65 degrees. Appreciate any advice!