Are unvented propane heaters prohibited contained by private homes surrounded by foreign york state? ...
Answers: It's unsafe to run one inside regardless of what state you're in.
Basic Fuel Gas Code will of late dictate that they be installed in accordance beside the manufacturer's instructions. And, generally the first piece in the manufacturer's instructions is a statement in relation to not using the unit as a primary fry source.
You need to pose this put somebody through the mill to your local mechanical division authority to return with any code additions that apply to your locality. Otherwise you're only going to take ignorant answers close to the one above.