I've decided that I'll only purchase it if they send Jewell Stait to install it.
"You're using this in your den right? My 23k BTU kero heater will bring my entire townhouse up to 78deg if it runs all day from the basement (household furnace thermostat set to 72). How warm do you want it?"
Yes, but you have center stairwell design, which helps with heat distribution. I think 30K BTU should be enough, especially if I go the route of installing a collector fan (very quiet bath exhaust fan with a 6" tube) in the ceiling in the living room and running it to the hallway upstairs. That way I can move heat pretty quickly.