Owning your own home

I don't think there's too much in it.

Starting point is DEFRA approved clean burn design which will have air recirculation.

After that it's just choose a quality maker, the right output for your room size and make sure the flue install is also by someone reputable.

5kw output should be fine unless the room is massive.

I have a Morso which I love, it's about 15 years old and faultless. My dad has a Heta which he raves about and also seems fine when I've used it.

It's worth paying a bit more for a quality stove which won't warp internals and has decent air flow control.

Wood stoves.

I know they're taboo

I think the main issue when people ask here is the idea of fitting one in London's famous London where the air quality is already awful and you contribute to local particulate pollution.

In rural Spain I think you're allowed a pass on that front. Presumably you don't have mains gas, so any gas needs to be delivered (creating additional CO2), which means using a clean burning stove could mean lower carbon emissions, as well as a renewable source of energy (presumably you're surrounded by free or cheap wood, again not true in London)?

In Spain you obviously won't need to buy a DEFRA-approved one but I'd encourage you to if only for the health of your family in the immediate area.