Sizing a wood stove for a 20' yurt ?

[Surely Yurts - Steve]

I've cut and split my own & heated with nothing but a woodstove in my various yurts over the years. Unfortunately, my body is getting older and the early morning winter temps inside after the fire burns out overnight are getting to be a stress on me. I will still heat with my woodstove primarily but I am adding this off-grid gravity fed pellet stove to my yurt this year. I intend to heat with my woodstove all day, but when I get ready for bed I will kick on the pellet stove so that it is still nice and toasty when I wake up in the morning. Here is the link to this really cool new technology! WiseWay Pellet Stoves - Stoves | Central Point, OR