Well...yes and no. It was a really busy summer around here and I didn't get everything changed over the way I wanted to. My goal is to take the Yukon out, install this unit in its place, and then I have a 60-70k BTU oil furnace that will be tied in too...make it all work together seamlessly. The way things are now, if I want to run the AC or oil heat I have to do a little work to switch things around...gotta get it to where its more user friendly so the wife can run things if I'm laid up or gone...I'm on call 24/7 at work and sometimes I get called a lot in the winter. Anyways, it got to be late October and it finally got cold...we soon were gonna need more heat than the fireplace stove can make, so I had to throw things together in little time...so it went in as an "add-on" just like the Tundra was...so no plenum...I have a 10x20 duct coming straight off 'er up into one of the main ducts...working pretty well like that. Definitely has a lil more nuts than the Tundra...but its hard to compare directly because we have added an extra 650 sq ft that we were not heating before...that, and this winter has been so mild so far! Still haven't loaded but twice per day...and half loads (at most) at that!