Bob and Donna Anderson have a real nice 50 ft. dome on the bluff above the east end of Hyrum Reservoir. It has a very open interior. When I was last inside, it had no second floor walls. It has a nice south facing extension that is all glass and is home to many plants. All bedrooms are in the basement; the master bedroom is under the greenhouse extension so that Donna can have a retreat in a completely conventional rectangular room. Heat is provided by zone controlled hot water heat in the floors. The wall mounted boiler is about the size of a little space heater.