Gas central heating, combi boilers, we have two small ones because of the configuration of the house.
We have a wood-burning stove in the living room, which we use if the weather is so cold the heating needs to be on all day, about 6 days this winter, instead of just morning and evening and on Sunday afternoons, Christmas etc. The stove was installed 15 years ago, after some wood on an open fire 'exploded' and set an uphostered chair on fire. So it doesn't meet modern standards.
Last year we had an extension built so we are currently burning dry wood rescued from the small extension that was replaced and waste wood from the new construction. Also a load of pallets that came with building materials loaded on them. All wood is stored in a large dry, well ventilated wood shed, completely protected from the weather.
We have a holiday home in France, using electricity heating and again a stove, due to be replaced this summer, as the previous one fell apart this winter, which means the new one will meet all French standards. The wood there is also stored under cover and protected from the weather.