Dometic RV Air Conditioners Penguin II & Blizzard Series

What is the difference between the Dometic Penguin II and Blizzard NXT air conditioners?

The Penguin II has a low-profile aerodynamic shroud (about 9.5 inches tall) that reduces wind drag and clearance issues, with cooling output of 13,500 or 15,000 BTU depending on model. The Blizzard NXT is a high-performance unit rated up to 15,000 BTU with a heavier-duty compressor, dual-stage motor, and improved airflow for hot-climate use. If you camp regularly in 95°F+ temperatures or have a longer coach, the Blizzard NXT pulls down cabin temps faster. For lower-clearance situations and standard summer use, the Penguin II is the practical pick.

Are these units ducted or non-ducted, and do I need a separate ceiling assembly?

Both the Penguin II and Blizzard NXT rooftop units are sold as the rooftop chassis only. You will need a matching ceiling assembly to complete the installation, and the assembly must match your duct configuration. For non-ducted coaches with a wall thermostat, see the Dometic non-ducted ceiling assembly collection. Confirm your existing wiring (thermostat type, 110V supply) and roof opening (standard 14" x 14") before ordering.

Will a Penguin II or Blizzard NXT replace my older Duo-Therm rooftop AC?

Yes, in most cases. Duo-Therm is the legacy Dometic brand, and the Penguin II and Blizzard NXT are designed to fit the standard 14" x 14" RV roof cutout used on Duo-Therm units from the 1990s onward. You will likely need to update the ceiling assembly and thermostat to match the new control board. Always verify your existing roof opening, amp draw (most run 13-16 amps on cooling), and whether your coach has heat strip wiring before ordering.

What other RV electrical accessories should I check when installing a new rooftop AC?

A new air conditioner is a good moment to verify the rest of your shore power setup. Inspect your 30 or 50 amp cord and adapters in the RV plug adapters collection, and consider a surge protector or soft start kit to reduce inrush current on startup. For thermostats, control boards, and related components, the RV electronics collection covers the parts most often replaced alongside a rooftop AC swap.

How much do these air conditioners weigh, and can my RV roof support them?

The Penguin II weighs around 78-82 pounds, making it one of the lighter rooftop units and a good choice for travel trailers and smaller motorhomes. The Blizzard NXT runs closer to 90-95 pounds. Most modern RV roofs are rated for these loads when the unit is mounted over a reinforced 14" x 14" opening with the original support framing intact. If you are replacing a basement or wall-mount system rather than a rooftop unit, the roof structure will need to be evaluated before installation.

Does United RV Parts offer shipping on Dometic rooftop air conditioners?

Rooftop air conditioner units ship via truck freight due to size and weight, with freight charges shown at checkout. Smaller parts and accessories in this collection ship standard ground, with free shipping on orders over $100. If you need help confirming the right unit for your coach, our team is here to help. Text or call 817-984-1852 before placing the order and we will walk through fitment and freight options.