Hello, I live in a 1800 square foot house in the Southern California high desert. The average low temperatures here are November (35 degrees), December (29 degrees), January (31 degrees), February and March (35 degrees), and April (45 degrees). The lowest recorded temperature was 4 degrees back in the 80’s. We have a lot of wind here through out the year. My wife finally agreed on a freestanding stove = ^ ). I was not interested in any of the fireplace inserts for my zero clearance fireplace. My dealer said installing a Harman on the hearth would not be a problem (elbow up, elbow into the fireplace and elbow up into the new stainless steel chimney liner. He will also install a piece of flat black sheet metal behind the stove to cover the zero clearance fireplace. The hearth is in the main living area about 1000 square feet. Most of this area has a cathedral ceiling 13 feet on center, plus a little higher for the two sky lights (no ceiling fans yet). This entire area is a porcelain tiled floor on a concrete slab. The other 800 square feet is the rest of the bedrooms/bathrooms. Double pane aluminum windows (no argon gas and about 15 years old). My dealer seems good. I have heard good things about them from several sources. He carries all of the Harmon stoves but I couldn’t get a good stove sizing estimate from my dealer. I currently have a central hot air system driven by a natural gas furnace. All of the vents blow the heated air from the ceiling down (smart way to heat a house). The less the furnace comes on the better. As long as the back bedrooms don’t get too cold. I really like the XXV. I read the user manual and all of the reviews I could find. The automatic temperature control would work well here. When the sun is up the temperatures are mild but as soon as it starts to go down run for shelter. I know the Harmon stoves are sized for the Northeast. Would the XXV be too much stove for me out here? Would running it on low or medium most of the time be inefficient? ,Cause dirty glass? Should I be looking at the P38? Crank it up at night and turn it down during the day? Any Harmon owners in the high desert areas? I know there is a big price/feature difference between the stoves too. Money is a factor but getting the right tool for the job is more important to me. Keeping the house between 70 and 72 degrees would keep everyone around here happy. I am ready to buy. Thanks.