Nashua NC-2

A buddy of mine had burned wood for over 30 yrs, and got tired of the work, and was able to acquire this "combo" stove a few yrs back. He's still in the experimental stages, and has it mounted in his ranch house basement, with the stove pipe running approx. 8-10' horizontally, (angled up), connecting to a red brick chimney, outside his foundation. The only adjustments on his stove is some "spiral" intake valves mounted low. He also has a problem getting it to run through the nite. Anyone have any info, or tips on this stove? Thanx