I have a carport that was closed in to become a 3rd bedroom in our house. It has a low ceiling of approx 8 or 9ft. I gutted the whole room so it's down to the slab right now.
I'm in the process of getting an on demand water heater (Navien CH240) for my house for my radiant floor and domestic water. I already have radiant floor heating in the original part of the house but want to add it in the carport area.
My question, would I be better off getting an electrical 120sqft heating pad from build direct (everwarm) for $1200 and hook that up, or should I tie into the new navien combi unit and add another zone of hydronic heating for my 11x17 room in the carport. That would make my radiant floor heating area 1400 sq ft, and with 2 adults in the house we're not as worried about pressure so really a question of ease of installation and cost.
And also, since the ceiling is so low, if i were to choose a system, which one would require less floor room (ie. subfloor, ect.)