The ducted floor vents get heat from the Moto Aid system, which applies hot water and heat when the engine is running, you should have a switch on the dash that controls the fan for this system,if I remember right, it's a 3 position with high on top,...
Went from an 03 Itasca Suncriuser on a Workhorse chassis (35 ft.)to an 08 Tiffin ( 37ft) on a Fred chassis. It was a positive change, certainly not a diesel pusher, but much better power and drivability. Milage went from 6.5/7 mpg in the Itasca to 9...
Didn't have a Newmar, but did have 2003 SOB with the W22 Workhorse chassis with 8.1 and Allison. As I recall, their was a switch on the dash labeled " O/D on off" or something close to that . It locked out the 5th gear overdrive and I as I recall g...
From 2007 to 2010 or 11 Newmar offered a model much as you're looking for, the Allstar line. Check their brochure archives for those model years and look at the models 4154, 3959 and 3951, both have permenant sleeping arrangements for 4, and offered...