We have a multi fuel stove that free stands in the fireplace.
I love , love, love it. It's made winters very cosy in the front room. However, it's like the artic in the bathroom, and almost as bad in the kitchen which is next to it.
For the most part this is our only heating, if it gets exceptionally cold we will put the radiators on. Our boiler is an ancient 'glow worm' type, and is very inefficient and expensive to use, so we keep the fire 'in' from about end of November to end March and the doors in the house open for the heat to disperse.
It's hugely messy with ash floating everywhere, but it really is a lovely heat, reminds me of sunshine!