Dometic Penguin II Rooftop Air Conditioner

The Dometic Penguin II remains a reliable, well-proven choice for RV owners wanting dependable rooftop cooling without chasing the latest smart features.

4.3

HitchHaven score4.3 out of 5 · our editorial rating

13,500 BTU cooling capacity
Low-profile aerodynamic design (12.3" height)
Compatible with Dometic 3313107 or 3310012 ceiling assembly
Rotary compressor for quieter operation
Built-in start capacitor for better low-voltage starts
Optional heat pump version available

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Overview Specs Pros & cons Full review Related

The verdict

The Dometic Penguin II remains a reliable, well-proven choice for RV owners wanting dependable rooftop cooling without chasing the latest smart features. Its low-profile design, solid cooling output, and relatively quiet rotary compressor make it a practical upgrade or replacement unit, especially for those already using Dometic ceiling assemblies. It's not the lightest or most tech-forward AC on the market, but its durability and consistent performance keep it a go-to option for long-term RV climate control.

Spec plate

Cooling Capacity: 13,500 BTU/hr
Height: 12.3 inches
Weight: 85 lbs
Voltage: 115V AC
Compressor Type: Rotary

Pros & cons

What we like

Noticeably quieter than older Dometic/Duo-Therm models
Lower height improves fuel economy and ground clearance
Durable, UV-resistant shroud holds up well over years
Straightforward installation on existing Dometic ductless or ducted assemblies
Strong airflow cools larger RVs effectively
Available in ducted and non-ducted configurations

What to watch

Heavier than some competitor units, adding roof stress
Requires compatible Dometic ceiling assembly, limiting cross-brand swaps
Can draw significant startup amperage without soft-start add-on
Thermostat interface feels dated compared to digital competitors
Condensate drainage can pool if roof isn't perfectly level

Full review

The Dometic Penguin II Rooftop Air Conditioner is a purpose-built cooling system engineered specifically for RVs, travel trailers, and campers that demand reliable climate control without sacrificing aerodynamics or roof space. Designed as a low-profile unit, the Penguin II integrates smoothly into the roofline of most recreational vehicles, reducing wind resistance and road noise while delivering powerful cooling performance. Available in 13,500 and 15,000 BTU configurations, it suits a range of rig sizes, from compact camper trailers to larger motorhomes, making it a versatile choice for RV owners who want dependable comfort during warm-weather travel.

Built with Dometic's reputation for durability in mind, the Penguin II features a rugged, UV-stabilized shroud that withstands sun exposure, rain, and the general wear of life on the road. Inside, the unit is engineered for efficient airflow distribution, helping to cool the entire interior evenly rather than leaving hot spots near the back of the vehicle. The compressor and condenser are designed to operate quietly compared to older rooftop units, which matters greatly to campers parked in quiet campgrounds or boondocking sites where excessive noise can disrupt the outdoor experience. Its straightforward mounting footprint is compatible with many existing Dometic gasket systems, simplifying replacement for owners upgrading from previous rooftop air conditioner models.

Beyond raw cooling power, the Penguin II is built to pair with digital wall thermostats and control panels, giving RV owners precise command over interior temperature settings from inside the cabin. Optional heat pump versions extend its usefulness into cooler months, allowing the same unit to provide supplemental warmth without needing a separate furnace cycle. Lightweight construction helps minimize the overall impact on a vehicle's roof load and fuel efficiency, an important consideration for long-distance travelers. Altogether, the Dometic Penguin II stands as a practical, road-tested climate control solution for RVers who prioritize comfort, quiet operation, and long-term reliability during their travels.

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