Sadly, Smokester, I'm in the same boat as you on this question! I plan to find the answer as the weather gets colder, though! I'm one of those nuts that's out grilling in a sub-zero snow storm! Hehe...my neighbors must think I've lost it! But hey, good Q doesn't wait for warm weather only! ;D I bet we'll see a little increase in cook time, but these units are well-insulated and efficient, so I bet they'll work great.