
NU-3901ST Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $25.82 | Condition is New, Uni NU-3901ST Multi-Stage Replacement Part Air Filter, FREE SHIPPING | 98.9% |
![]() | $29.24 | Top Pick! Condition is New, Uni Filter FOAM FILTER VOR NU-3901ST, FREE SHIPPING | 99.7% |
![]() | $21.91 | Condition is New, Uni Filter Foam Filter Vor, shipping cost = $9.90 | ![]() |
![]() | $31.97 | Top Pick! Condition is New, Uni NU-3901ST - Multi-Stage Competition Air Filter 264298 uniNU-3901ST, FREE SHIPPING | 99.7% |
![]() | $32.83 | Condition is New, UNI FILTER FOAM FILTER VOR NU-3901ST, FREE SHIPPING | ![]() |
![]() | $23.58 | Condition is New, UNI FILTER FOAM FILTER VOR NU-3901ST, shipping cost = $10.49 | ![]() |
![]() | $33.50 | Condition is New, Uni Multi-Stage Competition Air Filter - NU-3901ST, FREE SHIPPING | ![]() |
![]() | $35.95 | Top Pick! Condition is New, Uni NU-3901ST Multi-Stage Competition Air Filter, FREE SHIPPING | 99.6% |
![]() | $36.33 | Condition is New, Uni NU-3901ST Air Filter fits 1999-2001 VOR 400/503, FREE SHIPPING | 99.9% |
![]() | $36.33 | Condition is New, Uni NU-3901ST Air Filter fits 1999-2001 VOR 400/503, FREE SHIPPING | 99.8% |
![]() | $39.44 | Condition is New, UNI FILTERS NU-3901ST UNI FILTERS NU-3901ST Foam Filter for Off-Road Vehicles,, FREE SHIPPING | 100.0% |


The Uni Nu-3901ST Multi-Stage Air Filter is a high-performance air filtration solution designed to provide exceptional indoor air quality. This air filter stands out with its multi-stage filtration system, which includes a pre-filter, a pleated filter, and an activated carbon filter.
The pre-filter is the first line of defense, effectively capturing large particles such as dust, pollen, and pet hair. The pleated filter, which follows, is where the finer particles, including smoke, mold spores, and bacteria, are trapped. The third and final stage is the activated carbon filter, which is specifically designed to eliminate odors and harmful gases, ensuring that the air you breathe is not only clean but also fresh and pleasant.
The Uni Nu-3901ST Multi-Stage Air Filter is also easy to install and maintain. It features a 1-inch thickness, making it compatible with most standard HVAC systems. The filter is also pleated, ensuring a high surface area for maximum filtration efficiency. The filter is easily replaceable, ensuring that you can maintain optimal performance over time.
In addition, the Uni Nu-3901ST Multi-Stage Air Filter is made from high-quality materials that are both durable and effective. The filter housing is made from sturdy plastic, while the filters themselves are made from a dense, pleated material that can withstand regular use.
In summary, the Uni Nu-3901ST Multi-Stage Air Filter is a powerful and reliable air filtration solution that provides comprehensive protection against a wide range of indoor air pollutants. Its multi-stage filtration system, easy installation, and long-lasting design make it a great choice for anyone looking to improve the air quality in their home or office.
Pros of buying a Uni Air Nu-3901st Multi-Stage Air Filter:1. Multiple Filtration Stages: The Uni Air Nu-3901st uses a multi-stage filtration system, including a pre-filter, activated carbon filter, and a HEPA filter, which can effectively remove a wide range of pollutants, including dust, smoke, pet dander, pollen, and odors.
2. High Efficiency: The HEPA filter in the Uni Air Nu-3901st can capture up to 99.97% of particles as small as 0.3 microns, making it an excellent choice for people with allergies or asthma.
3. Easy Installation: The Uni Air Nu-3901st is designed to fit most standard HVAC systems, and it comes with mounting brackets and a filter change indicator to make installation and maintenance easy.
4. Long Filter Life: The Uni Air Nu-3901st has a longer filter life than many other air filters, as the pre-filter can be washed and reused, and the HEPA filter can last up to 12 months.
Cons of buying a Uni Air Nu-3901st Multi-Stage Air Filter:1. Higher Price: The Uni Air Nu-3901st is more expensive than many single-stage air filters, so it may not be a budget-friendly option for some people.
2. Limited Capacity: While the Uni Air Nu-3901st is highly effective at removing pollutants, it may not be able to handle large volumes of air if you have a particularly large home or an HVAC system with a high airflow rate.
3. Maintenance Requirements: While the Uni Air Nu-3901st has a longer filter life than many other air filters, it still requires regular maintenance, including washing the pre-filter and replacing the HEPA filter every 12 months.
Conclusion:The Uni Air Nu-3901st is a high-quality, multi-stage air filter that can effectively remove a wide range of pollutants from the air in your home. While it may be more expensive than some other air filters, its long filter life, easy installation, and high efficiency make it a worthwhile investment for people with allergies or asthma, or for those who want to improve the air quality in their home. If you have a particularly large home or an HVAC system with a high airflow rate, you may want to consider a larger air filter or a higher-capacity HVAC system.
Recommendation:If you are looking for a highly effective air filter that can improve the air quality in your home, the Uni Air Nu-3901st is a great option. Its multi-stage filtration system, high efficiency, and easy installation make it a convenient and reliable choice for many homeowners. However, be sure to consider your budget and the size of your home or HVAC system before making a purchase.
Details:
Fits in stock air box exactly like oem filter. Traps dirt and dust in 2 layers of foam. Features the ultra seal grease groove on sealing surface. Actual product may differ from the item shown in photograph.
The small pore, inner filter prevents any engine-wrecking grit from reaching the cylinder. Unsurpassed in airflow, dirt stopping and overall performance. Photos are for reference only. The large pore, pre-filter captures the bigger particles.
Made in the USA, fits cor 400/503 cc - 1999 -2001.
specifications vintoscooter:
- brand: Uni
- mpn: Nu-3901st
- type: Fuel Air
- manufacturer warranty: 1 Year Manufacturer Warranty
- authorized dealer: Yes
- legal disclaimer: Your Local Laws Before Purchasing
- photo disclaimer: For Reference Only, See Item Details
- upc: 804451039011
general vintoscooter:
- category: Motorcycle Parts > Scooter Accessories > Body Frame > Decals Vinyls
shipping vintoscooter:
- type: fixed
- class: standard, expedited, one-day
- service: standard, expedited, overnight
- transit: 3-9 days
offer vintoscooter:
- availability: in stock
- started: december 9, 2024
- sold #: 26
- options: ship-to-home
- prices: $21.91–$39.44
- item condition: New
payments vintoscooter:
- wallet: apple-pay
- credit card: mastercard
- other
returns vintoscooter:
- time: 30 days
- policy: returns accepted
- paid by: seller
seller vintoscooter:
- rating: 97.9%
- city: cedar park, texas
- # reviews: 173337











