That seems very small to me for a fp. Anyway, a thermostat could control the heat for you.

I would probably consider a space heater.

Avalon has a small gas fireplace among their offerings. There are also companies that offer 6-8" deep contemporary fireplaces, although they can be quite pricey.

Here is a link that might be useful: avalon fireplace

I would consider a tiny gas stove. Go to woodstove.com and then click on soapstone gas stove. You will then see a selection of gas stoves in different sizes. I think the one called "cottage mini" might be the right size for your bedroom. I cannot vouch for this item personally. I just happen to know about it because it was one of the things we considered when we were planning a backup heating source for our bedroom for when the power goes out. We decided instead to get a gas insert for our living room fireplace. Next time we have a power outage in the winter, we'll sleep in the living room in front of the fire. There may be other small gas stoves manufactured by other companies, which you should look into. You could probably get one in cast iron. I understand that the advantage of soapstone is that it retains heat and releases it for longer than cast iron, but it takes longer to heat up in the first place. But I do not know of any head-to-head comparisons between the two. There may also be really small fireplaces on the market; Google "small gas fireplace" and see what turns up. But a stove will be much cheaper to buy and easier and cheaper to install. The new styles are pretty attractive. Just make sure they have direct vent technology. Otherwise it would not be safe for your bedroom (or anywhere else in my opinion) and probably a building code violation.

Happy hunting.

you did not say you wanted a gas fireplace so, for that small bedroom and low heat,I would get an electric fireplace. I saw one that was 33 inches and you just plug it in. Barb