I've yet to experience summer in FL. The worse environment has been an 80+ degree day in when my wife had all 3 burners going. Turning on the AC and a 'blow around' fan on near the AC quickly brought the temp down to tolerable levels. It takes a while to bring temps down to the 70s but it starts moving in that direction and probably more importantly begins removing humidity.
I would guess if a 5000 btu unit can cool your bedroom it probably can cool your Boler
I don't off hand know my model, but Walmarts typically has them fro $100-130 by Fridgedaire. I just took one we had at home and never used. I'll check for the number in the morning.
friend of mine, Kerry, added an AC to the front of his tongue, nicely fiberglassing it in. If he doesn't follow up I can try to link the two of you.