Greetings:
I was taking care of honey-do lists, one of which is move gas dryer closer to wall (which I can't do). In the process, I realized I do not know enough about gas dryers to make intelligent decisions. One of my sticking points is that I don't know how the gas dryer flame chamber is isolated from the rotating drum, how the hot air flows, and most importantly, I don't know where the spent fuel exhasut goes in a gas dryer. Does it get channelled through the cloths (inside drum) and out through the 4" hot-air exhaust port, or does it blow out the back of the dryer into the laundry room?
Any insight or re-direction to service manuals would be appreciated.

After the moisture laden air is cycled it is supposed to go OUTSIDE only on a gas dryer. The vent should be as short a run as possible. Now some folks decide to let the dryer vent dump into the home and that is a big NO NO with gas. Now on electric since there are no serious combustion by products it can be vented into the home but I do not recommend it. Many folks use dryer sheets and the chemicals they give off are not good for you so it is actually best that all dryers be vented outside especially gas.

NOTE: there are dryer adapters that convert the 4 inch circular hole to a flat duct arrangement. This allows the dryer to be moved closer to the wall while still allowing the dryer to be properly vented to the outside. Do a Google search for more info on this product.

There are actually two air streams within a gas dryer. The first uses inside air cumbusts it and passes it out the dryer vent by the force of the burner and the chimney effect. This stream may pass over a long thin rectangular duct with some slats in it. Those slats are positioned along the back of the drum.

There is another stream that has a blower on it that pulls some of the air from a different part of the back of the drum, through a screen or air filter and mixes with the outgoing gasses, now cooler and with lint removed.

http://www.partadvantage.com/catalogimage.php/LD14-37.gif?geometry(1000x1000)

http://www.partadvantage.com/catalogimage.php/LD15-10.gif?geometry(1000x1000)

http://www.partadvantage.com/catalogimage.php/LD17-34.gif?geometry(1000x1000)

The above pics will show the air movement system that keepitsimplestupid mentioned

I lost my special glasses. I can't see them.

The pics above didn't load.

Dang it. Lets try this.

Convert to PDF

The best one will not convert. It is a imperfect world we live in. LOL I was just trying to post a few pics of the air carrying parts of the dryer.

Just when I thought you had it all figured out. My faith in you just dropped a little.LOL

This is of course from someone that doesn't even know how to download pics. And by someone I mean ME. All I know about these gall dang computers is how to shut it off and on again when its running to slow, ha.

You might be able to look at a diagram for your exact dryer from Parts & Accessories | Shop & Find Lawn & Garden, Appliance Parts at Sears PartsDirect | SearsPartsDirect.com (http://www.searspartsdirect.com)