2017 Outback 332FK

[shawdog]

When we use the furnace ,2 of the 3 registers work. The one in the bedroom does not have any heat coming out of it at all.Anybody else have this problem?

[skids]

We have a Bullet 248RKS where the furnace is at the rear and the bedroom is at the front. It is the same with ours.

[JRTJH]

Nearly every RV with the furnace near one end of the floorplan has "decreased airflow" at the other end of the trailer. It's caused by a number of issues, nearly all considered "normal for any RV". Your furnace is in the roadside front dinette bench, so your floorplan is "one of those with this issue in all models."

There is a small ductwork space and smaller ducts. If you have the "aluminum center duct run" it's 3" deep, 10-11" wide. Minimal airflow through that run is normal. If you have the 4" aluminized round (dryer vent tubing) ducts, they are a "airflow reducer" more than a means to deliver airflow. Just the spiral spring molded into it restricts much of the airflow through that type duct.

Then, consider the 25-30' duct run and it's not surprising that there's "minimal airflow" in the furthest duct from the furnace.

Typically, dealers will lay a tissue or a sheet of toilet paper on the duct, turn on the furnace fan. If the tissue moves, it's considered adequate and normal airflow. There's really not a lot you can do to modify your trailer to improve the airflow at that register, but if you're really concerned, the dealership likely won't get approval to repair it under warranty so you'll be left "to do the work or foot the bill"...

If you elect to "do the work" the first step would be removing the coroplast underbelly cover and inspecting all the ductwork. You may find a crushed part, a kinked part or you may find that there's nothing wrong.

Most owners just "ignore the airflow issue" and prefer to sleep a bit cooler than the rest of the trailer, so it works out fairly well for most owners. YMMV