Tried to use this on my pellet stove in place of the factory fireproof disc. I tried it at 140, all the way down and all the way up. The oven will not work with this adjustable unit. Luckily, I also ordered a cheap 150-20 snap disc at the same time, which was easy to install and allowed my stove to feed and regulate the temperature automatically. I ended up getting my pellet stove heat back with a cheap snap dome (still works and have seen more than 2 pallets of pellets) and my money back on an adjustable snap dome.