forced hot air gas furnance blower unit

I heat my house with Rudd gas fired furnace which is forced hot air driven. I have no AC incorporated. my question is my Jotul firelight is being installed in a week an the room where it is located is 20x20 but the catch is the ceilings are only 6'6 in this part of my 125yr old home. I want to install a "FAN ONLY" switch on my thermostate to circulate the heat. My returns are in this room. will this work or am I wasting my time? And will my blower motor burn out soon from using it in this manner? Any advice would be great

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