Nope. In this case it vents immediately outside. There are no moving parts. They don’t make them anymore

It heats up a radiator, so the room heats up by convection. There is a separate blower on the side to speed that up, but it’s not necessary to get the room hot

This is for a one room addition, so there’s no house circulation to worry about. It’s 20’x20’ so we can all sleep in there easily enough