Kitchen RMH

I am in the end process of planning my kitchen rebuild and thought I would incorporate either a rocket mass heater or just a masonry wood stove.  This was great information at the right time.

It's about 24 by 28 ft and will be as air tight of a shell as I can make it.  If I'd like to heat it quickly on a winter day and have it radiate heat for 24 hours, how much mass do I need to heat with a single burn?

I plan on incorporating thermal mass in the main room itself and additional passive solar and soil thermal battery on the south side for the shoulder months.  So I'll need about 3 months in deep winter for the RMH assistance.

The main heating area will be about 28 by 14 ft, 8 to 9 ft high.  How do you adjust the quick heating portion of the bell to the long heating mass of the rocket stove?

We do get down to -20's F on some nights.  While the USDA says we're zone 5 now I can't count on more than 4 in my particular location.

Any help with those 2 questions would be helpful.

Those are some great questions, Kathy. I hope someone has some advice for you.