Suburban furnace in rear of coach

[Captrick]

I would like to know why my coach a 2019 tiffin open road 36 la has a suburban exhaust in rear of coach as well as the furnace in the center. I just purchased the coach privately it has 5 k miles on it and the old owner is hopeless to talk to,I can’t find it in the owners manual it looks like it has never been used. The coaches furnace works fine But nothing happens with the rear. It is positioned on its side where the center furnace is on the flat. Any help would be appreciated

 

[mytime]

There is a second furnace in the rear bath under linen closet.

 

[Captrick]

Where are the controls for it all I have on the spider control is for the front furnace nothing for the back. Thanks

 

[mytime]

I have a 2020 36LA and the spider panel has controls for FRONT AC/Heat pump/Furnace and REAR AC/Furnace. This is on the temperature screen. Front is on left side of screen and rear is on right side of screen.

 

[Captrick]

Thanks but my spyder control only has ac on the rear no furnace as the front one has