If your client is very particular about giving a room a specific ambiance, an unusually imaginative choice would be a ventless fireplace from hearth cabinet. they have an exquisite selection of finishes in many sizes and custom colors. the units, themselves, are very high quality, and provide a focal point for the whole design process. as a designer/craftsman as well as sole proprietor of carpistry, New York City, over the last four years I have been designing- often in collaboration with clients- then building the mantels which house these units. the hearth cabinet staff is very knowledgeable, professional and friendly. they give me all the help I need before committing to the final step of installing the fireplace. and, oh, never have to worry about getting your delivery on time!