Component 1 · Older 3109349 family
Dometic 3109349.065 — Black 30-inch sidewall vent
Manufacturer colour chart confirms the black suffix .065. Verify the existing opening and model application; not the smaller 3109492 family.
View partRV Refrigerator Sidewall Vent Sizes & Parts Reference — Dometic/Norcold
Identify Dometic and Norcold RV absorption-refrigerator sidewall vents by manufacturer number, opening size, model family and finish. The lower sidewall vent admits outside air and allows access for service; some certified installations use a separate upper sidewall exhaust vent instead of a roof outlet. A louver panel must match the refrigerator's approved ventilation arrangement and the existing wall opening.
Manufacturer ventilation drawings and vent-family tables
Dometic's official North American DM/RM/DMA refrigerator installation manual includes certified vent application tables (printed pages 11–15), colour-code variants and upper/lower sidewall airflow diagrams. The Dometic vent application sheet identifies the 3109492 rough opening as 9-11/16 × 19-1/4 inches.
Norcold's 622090A ventilation guidelines include original drawings of small 620505-style and larger 621156-style openings, upper and lower vent configurations, plus baffle requirements. Consult the specific refrigerator's installation manual before ordering or changing vent position.
Use the manufacturer drawings and product photographs below to compare the vent frame, opening and replacement part numbers.
Find the part in the refrigerator ventilation system
Supplies fresh air from outside and serves as the burner/control service access. Do not obstruct the opening or change its location without a certified installation procedure.
Rear baffles guide air over the absorber and condenser. Vent size alone does not establish cabinet clearance or compatible refrigerator model.
A second sidewall vent may be required for certain installations; other systems use a roof vent. These configurations have different height and baffle requirements.
Match the complete numbered louver assembly, original rough opening, colour, radius corners and retaining hardware. Similar grilles may not interchange.
Dometic and Norcold replacement sidewall vents
Component 2 · Compact 3109492 family
Dometic 3109492.003 — Polar-white upper/lower side vent
Dometic's vent application guide lists a 9-11/16 × 19-1/4-inch rough opening for this family. Confirm against the installed vent frame.
View partComponent 3 · Compact 3109492 family
Dometic 3109492.004 — Black upper/lower side vent
The black version of the 3109492 family, listed in Dometic's original colour-code table. Not the 3316941 vent size.
View partComponent 4 · Larger 3316941 family
Dometic 3316941.010 — Polar-white sidewall vent
Factory installation-table part number 3316941.010, polar-white finish; separately identify the vent size and RV refrigerator installation method.
View partComponent 5 · Small panel
Norcold 50650 — Black small side vent
Catalog identifies a 6-3/16 × 17-13/16-inch opening family. Verify Norcold's model-specific vent and the original attachment.
View partComponent 6 · Small panel
Norcold 50652 — Polar-white small intake vent
Listed size is 17-13/16 × 6-3/16 inches. Similar dimensions do not alone certify interchangeability with 50650 or older 620505 parts.
View partComponent 7 · Large panel
Norcold 621156AG — Aero-gray large side vent
Manufacturer-family number 621156 with Aero-gray suffix; confirm colour, actual perimeter and complete part number.
View partComponent 8 · Large panel
Norcold 50655 — Black large side vent
Catalog lists a 21-1/2 × 13-3/4-inch opening family. Check the original frame dimensions and retaining parts.
View partComponent 9 · Large panel
Norcold 50656 — Bright-white large side vent
Catalog identifies a 21-1/2 × 13-3/4-inch side vent; bright white is not necessarily the same shade as polar white.
View partComponent 10 · Large radius-corner panel
Norcold 50657 — Polar-white radius-corner side vent
21-1/2 × 13-3/4-inch catalog size; verify radius corners, door/frame assembly and original opening.
View partComponent 11 · 2118-specific
Norcold 50806 — Black upper/lower 2118 vent
Listed for the Norcold 2118 refrigerator installation family. Use the 2118 service/vent drawing, not a general Norcold frame dimension.
View partComponent 12 · 2117/2118-specific
Norcold 50807 — Bright-white upper/lower 2117/2118 vent
Identified in the catalog for 2117/2118 applications, but confirm exact model and serial range with Norcold.
View partComponent 13 · Series-specific
Norcold 51040 — Black side vent for N3141/N4141
Catalog identifies an N3141/N4141 vent. Do not assume it is interchangeable with small/large legacy Norcold vents.
View partVent-family comparison: check the opening first
Manufacturer application sheet: rough opening 9-11/16 × 19-1/4 in. Listed polar white 3109492.003 and black 3109492.004. This is separate from larger 3316941 vents.
Manufacturer's historical vent guideline shows rough opening 6-3/16 × 17-13/16 in. Catalog products 50650 and 50652 have similar measurements, but no blanket supersession is asserted.
Manufacturer's historical guideline shows rough opening 13-3/4 × 21-1/2 in. The catalog offers several large vent colours and styles. Confirm rounded corners and frame design independently.
The referenced Dometic installation manual lists 3316941.000 for black and 3316941.010 for white. It does not establish 3316941.005 as an interchangeable version. Check the full number on your original vent before selecting a replacement.
For Norcold 2118-specific replacement bins, drip trays, optical and power boards, and original numbered manufacturer exploded drawings, see the Norcold 2118 OEM parts diagram reference. These interior and electrical components are distinct from the wall-vent assemblies described above.
Combustion and installation safety
These are safety-critical vents on gas absorption refrigerators. Norcold's manufacturer document requires only approved intake/exhaust arrangements, adequate vertical airflow and separation of combustion gases from the RV interior. Vent screens, additional fans, baffles or altered openings must not restrict the certified airflow. Shut off the propane and electrical supply before servicing, and follow the refrigerator model's installation manual.
For roof exhaust caps and bases, see the refrigerator roof vent guide. For fan kits and screens, see the refrigerator cooling and vent accessories reference. Browse RV refrigerator vent parts for additional models.
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