They are not attached to room ducts but most models must be vented.
Williams gas furnace pilot light.
P142700 gasket is not included.
Williams furnaces are mounted on a wall or free standing in the room.
Depending on the size of your room or home and your climate a williams furnace may heat your entire home or can be used to heat zones in your home.
It can be used with the 14 000 22 000 and 30 000 btu natural gas models.
The williams p322398 is a pilot assembly for use with williams gravity direct vent wall furnaces.