Using hydronic in-floor heat in a superinsulated earth-bermed house
I’m planning an earth-bermed house at the 4,000 foot elevation in the mountains of eastern Washington. it will be single story, 8 foot 6″ or 8″ ICF walls on the sides and back. Back fill to 6″ from the top of the wall.
The front will have a double 4″ ICF front wall 2′ tall and then double framed walls with thermal break to the top. This is south facing. front wall insulation is cellulose at about 18″ thick but mostly windows 140 sq.ft on a 340 sq. ft. wall.
The floor will be 2″ or 4″ insulation with 4″ concrete floor.
I will use prefabbed trusses with a 18″ heal on the wall with hard foam on the outside and cellulose in the attic to a depth of 2′.
Super sealed all the way around.
about 1400 sf on the floor plan. But the back 5′ deep 40′ wide will be unheated mechanical and pantry space.
I may put in a small gas fireplace for ambiance and some heating with the possibility of a small woodburning stove.
Temps in the winter are typically teens at day and single digit at night during the coldest months.
14 miles from the Canadian boarder.
Wrestling with radiant hydronic in floor for heating or not.trying to do off grid as much as possible.