Mission Automotive RV AC Filter Replacement — 2-Count MERV 6 Foam for Dometic Duo Therm, OEM Fit

Mission Automotive’s 2-count replacement RV AC filter is a MERV 6-rated foam filter designed to fit Dometic Duo Therm units (3313107.103 / 3105012.003), improving particle capture and protecting your RV air conditioner.

When you spend time on the road, airborne dust, pollen and debris can quickly collect in your RV’s air conditioner. These replacement filters are built to slip into Dometic Duo Therm systems for a precise fit and reliable performance. Made from durable PPI filtration foam in the USA and supplied as a two-pack, they help you maintain airflow and reduce dust build-up between service intervals.

How does this filter fit my Dometic Duo Therm AC?

The Mission Automotive replacement is molded to match OEM dimensions for the Dometic Duo Therm series, including references 3313107.103 and 3105012.003. Installation is straightforward — remove the old element, slide the Mission Automotive foam into place, and resume use. Designed to seat snugly, it minimizes bypass and keeps conditioned air flowing efficiently.

• Direct compatibility with Dometic Duo Therm mounting points
• Same dimensions as the specified OEM part numbers
• Easy drop-in replacement—no tools for most installations

What does MERV 6 mean for RV air quality?

A MERV 6 rating indicates improved capture of larger airborne particles such as dust, lint, and pollen compared with basic open-weave foam. This level balances filtration performance with airflow, preserving AC efficiency while reducing visible debris inside vents and living spaces. It’s a practical upgrade for travel environments where coarse particulates are common.

• Effective against dust, pollen, and pet dander
• Engineered to maintain adequate airflow for RV AC systems
• Helps reduce dust accumulation on internal components

How often should I change these RV AC filters?

Replacement frequency depends on use and environmental conditions: generally every three months under heavy use, or up to every 12 months in low-dust situations. The two-pack gives you a spare so you can rotate filters seasonally or replace one immediately and keep the other as backup. Inspect visually—if you see visible soil or reduced airflow, swap the filter sooner.

• Typical heavy-use interval: ~3 months
• Light-use interval: up to 12 months
• Visual check recommended after dusty trips or extended storage

What materials and quality can I expect from Mission Automotive?

These filters are made from PPI (pores per inch) foam engineered for repeated airflow and particle capture without collapsing. Constructed in the USA, the foam is resilient to humidity and typical RV temperature swings. The two-pack format helps owners stay prepared with a direct OEM-fit replacement when needed.

• PPI filtration foam for consistent pore structure
• Made in the USA for predictable manufacturing quality
• Durable under typical RV environmental conditions

Who is this for? RV owners and technicians who use Dometic Duo Therm air conditioners and want an affordable, OEM-compatible replacement filter that balances particle capture and airflow. It’s useful for seasonal RVers, full-time travelers, and anyone seeking easy-to-install, American-made replacement parts to help protect the AC system and improve cabin comfort.