We will only do Full relines on All pellet, Wood and Gas. And we will not do a Direct vent pellet ither even if it cost me the sale of the stove. I must not be charging enough because I can do a 25' of 4" pellet vent and install for under $900 labor and materials. This is using flex around the damper and Duravent the rest of the way with a chase cap to seal off the top of the chimney. It is not that hard of a job or people that do it everyday. About 3 hours at the most including cleaning the chimney, Setting up a wired or wireless thermostat, Showing them how to use and clean it out the stove and firing up the unit sticking around for the 20 minute start up cycle. $300-$350 labor at the most plus materials.