If you're going to try burning corn, make sure your vent is rated for it. When burning corn, the exhaust gases are acidic which will damage venting (is)not corn rated.
Yes and no.... Techinically, you should not attempt to burn corn in any stove or appliance of furnace not specifically designerd to be a multifuel burner, in any ratio of corn to pellets...however.....
In a multifuel rated appliance, stove or furnace,you can burn corn in any ratio up to and including 100% corn (must start the flame with pellets), even with pellet rated venting, not corn/pellet rated though corn/pellet rated venting is preferred.....
Corn, when it combusts (carmelizes and ignites), produces trace amounts of nitrtic acid in the form of vapor. This vapor is corrosive not only to the lower grade of stainless alloy in a pellet only vent, but to the stove itself, however, there is a relatively easy way to inhsure that the venting and/or the stove isn't imnpacted by nitric acid corrosion and that is....
Regularly (once a month or so) run the stove on straight pellets in the higher heat ranges for a couple hours, that elininates any residual nitric acid vapors or condensed nitric/water vapor in the venting and/or the stove. t's also a very good idea to do the same when shutting down the stove for the spring/summer months, in fact, thats SOP by many manufacturers in their recommended spring shutdown sequence....
Personally (and from experience speaking), I would also disassemble the venting and clean it inside with soap and water (whether you run pellets or corn) or at least run a pellet pipe brush through the venting to clean it.
You also should remove the CA blower and clean the cavity of any deposits end of year andfor the interior of the unit with a good fogging oil after a thorough cleaning and don't forget to unplug the unit from the wall plug and disconnect the t'stat connections to the circuit board when the unit sits over the summer because stray induced current fron nearby electrical storms can fry the board if lefy plugged into the wall and/or hooked to a remote t'stat.
Most of the above is probably beyond the average user who has their unit maintained by an outside techinician, but that techinician should be doing what I've listed as a part of the spring/summer shutdown sequence...
For they DIY'ers, should not be any issue and it apples to pellet burners as well as multifuel burners.....
So, yes and no. While it's not 'perfectly' acceptable to combust corn with pellet only venting, it is possible so long as the owner is cognizant of and maintains the unit properly. Once you start combusting corn or corn and pellets in any ratio, the game plan changes slightly....
FYI, I run pellet only Simpson venting and I clean mine thoroughly every spring (and a couple times during the heating season) and I have absolutely no internal corrosion from bitric vapors in my venting or corrosion in my stove, but again, I maintain it properly.
Burning corn with a 'set it and forget it' attitude and a 'I'll ckean it in the fall because I don't have time now' attitude will get you corroded and perforated liners in the venting and severe corrosion of internal parts in the stove itself........