How many BTU is my furnace?

[bigbadbob17]

I did a search and could not locate the info, also checked the archive on the Keystone website but the brochure does not show how many BTU the furnace is. Anyone have a good resource or know what size of furnace they install?

2012 298BHSSR

Having low airflow in the 4 floor ducts down the middle of the trailer. I assume its a bad duct connection between the furnace and the main trunk. Furnace is under the fridge and the main duct about 3-4 feet from it down the middle of the floor. No ducts coming off the side of the furnace so I assume there is something coming off the bottom?

Thanks in advance!