There are some threads here with people who have done it. We do need more information from you before we can give useful advice. What is your house and room like, clearances, dimensions of the chimney, your climate, how much of your heat you hope to get from this RMH...
When it is used for evil, then watch out! When it is used for good, then things are much nicer. Like this tiny ad:
permaculture bootcamp - gardening gardeners; grow the food you eat and build your own home