General Furnace Info--airflow

TallPaul · 12-31-2007, 08:22 PM

I am curious how the heated air flows from the furnace. My furnace (can post brand and model later as it is past 1 am and snowing outside) has two ducts on left side, three places on the back that can be punched out for ducts, and two ducts on the right. Anyway, the two ducts on the left get about 60% more airflow than the two on the right, so I am thinking that the furnace must blow into the left side and the right side is farther along the internal furnace duct.

Thanks, Paul

TallPaul · 12-31-2007, 08:22 PM

I am curious how the heated air flows from the furnace. My furnace (can post brand and model later as it is past 1 am and snowing outside) has two ducts on left side, three places on the back that can be punched out for ducts, and two ducts on the right. Anyway, the two ducts on the left get about 60% more airflow than the two on the right, so I am thinking that the furnace must blow into the left side and the right side is farther along the internal furnace duct.

Thanks, Paul

**RV Wizard** · 01-01-2008, 12:56 AM

From the outside, facing the furnace, the burners are usually on the right side of the furnace. This leaves rom on the left side for the blower to move air across the heat exchanger and into the duct work of your coach.

TallPaul · 01-01-2008, 06:15 AM

Ah yes, makes sense. I can see the burners exhaust outside on the right. So the ducts on that side will likely blow more and perhaps hotter because they are first in line of the blower and closest to the head. I would guess then the air loops back across the back side and over to the left side to supply any ducts installed in those locations.

Then it makes sense, I am tapping two lines for heat to the water and dump compartments. I am going off the two on the hotter and higher flow side.

Unfortunately those sides are the bathroom and bedroom, leaving the main coach area to the two ducts on the weaker side. Maybe my taps will help balance things.

Thanks.

Ray,IN · 01-02-2008, 10:53 AM

If necessary to balance air volume flow into your proposed areas, you may install a 1/4 turn or slide-type(same operation as a gate valve) damper into the duct-work as it exits the furnace hot air box.