In one of the pellet grill forums I am in this was brought up, they apparently make them also for use in pellet grills.
A New Era in Home Heating is Here — Sustainable Resources Group
The popularity of pellet fuel appliances is growing rapidly due to their energy efficiency and lack of pollutants resulting from use. According to Energy.gov, “Pellet fuel appliances are more convenient to operate than ordinary wood stoves or fireplaces, and some have much higher combustion and...
sustainableresourcesgroup.com