Compact, yet powerful 12 volt ducted furnaces are ideal for mid-size RVs. NT-S furnaces can be ducted to provide even heat distribution throughout your RV. Features include low amp draw of 2.8 amps, energy saving electronic ignitions, uniform cabinet size for installation flexibility, wall thermostats, gasket-sealed vent assemblies, steel gas manifolds, sealed forced-draft combustion, and chrome-plated vent caps. Cut-out size: 9-3/8" H x 9-3/8" W x 22-1/2 D". 1 per box.