Allowing tenants to use fires for heat

I own a few small parks and several of my tenants are wanting to install wood burners, corn burners, and the like in their homes to heat.

I am worried that the tenants could catch their home on fire and someone gets hurt. This could also effect their neighbors if fire spread.

Any park owners out there ever deal with this?

Is it even legal for me to tell them they can’t heat their home as they wish?

I would like to tell them they can only heat with gas or electric furnaces or a “factory installed” fireplace.

Thanks for any help!