Jackson2000
New Member
3400 sq, ft, Very well insulated and passive solar design Most of the winter heating is done by the Tulikivi and the passive solar. A ground source heat pump will assist on the brutally cold sub zero evenings mostly between 2 and 6am. especially if it has been overcast. On a sunny day most of the home will be very comfortable even at -20F or lower heated with just the Tulikivi and passive solar.