The Rinnai 1004F-2033 is a genuine Air Inlet Packing for 1004FA. Gasket that seals the air inlet to the furnace. Install a new packing any time the inlet is removed.
This is an OEM Rinnai part, so it fits and performs the way the original did. Confirm your model before ordering; the model is on the rating label on the unit. If you are not sure which part you need, Rural Energy support can check it against your model and serial number.
Rural Energy is a Rinnai distributor and keeps Rinnai direct vent wall furnace parts in stock for fast shipping to dealers, contractors, and homeowners.