Inland Spain gets properly cold in winter, and a wood or pellet stove is the usual answer in an off-grid house. A stove with a back boiler can heat water and radiators as well as the room.
Size the stove to the space: an oversized stove run low burns dirty and coats the flue. The flue matters as much as the stove, so ask the firm to see the room and the roof before quoting.
Pellet stoves need electricity for the fan and feed; plan for that load on an off-grid system. Wood stoves need none, but you’ll need dry, seasoned wood and somewhere to keep it.
Questions to ask before you sign
- What output do you recommend for the room?
- Is the flue kit included, and how high will it go?
- Can it heat water or radiators?
- Who services it, and how often?