Hello. I went to run the furnace on our new to us kodiak 255bhsl and only found heat coming out if the metal grate in the wall by the bunk beds. Is there no other vents anywhere to blow heat? I really hope u overlooked them. The furnace is 19000 btu.
Your model is a bit bigger than our's (we have the 240bhsl) but has a somewhat similar layout. We have one floor register and it is fairly hidden. It's under the foot of the master bed right in the middle. All of our other heating vent's are in the walls down low. One at lower bunk and one in the bathroom. I think that's all for us, we have 3 heating vents.