Burtran Replacement Air Filter Set for Nano-Oxy A31/A32 Purifiers: H12 HEPA + TVOC Filter + Medical Grade HEPA 14 - Balanced PM2.5 & Odor Removal

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Nano-Oxy Ions: Forest-fresh air, stress relief, no ozone.
HEPA 14: 99.995% particle removal, medical-grade clean.
Smart Display: Real-time air data, app control, auto/sleep modes.
Wide Coverage: 1,360 ft²/h, CADR 181 CFM, certified safe.
Multi-Stage Filters: Washable pre-filter + carbon + HEPA layers.

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30 Day Money-Back Guarantee 30 Day Money-Back Guarantee
24-Month Limited Warranty 24-Month Limited Warranty

Nano-Oxy Module: Proprietary negative oxygen ion technology (2,000–5,000 ions/cm³) delivers a refreshing, forest-like atmosphere—boosting energy, reducing stress, and improving sleep—without ozone, radiation, or static.

Medical-Grade HEPA 14: Captures 99.995% of ultra-fine particles down to 0.1 μm, surpassing HEPA 13 efficiency by up to 90%—ideal for allergies, asthma, smoke, pollen, dust, and pet dander.

Advanced Smart Control: Real-time display for PM2.5, TVOC, NOI levels, and filter life, plus Wi-Fi app control, Auto/Sleep modes, child lock, 6 fan speeds, timers, and a 4-angle adjustable air outlet.

High-Efficiency Coverage: Purifies up to 1,360 ft²/h with CADR of 181 CFM (PM2.5) and 178 CFM (TVOC). Certified safe by FCC, ETL, and CARB, with 55W low energy use and a 2-year warranty.

Multi-Layer Filtration: Washable pre-filter captures pet hair and dust; activated carbon TVOC filter neutralizes odors and VOCs (formaldehyde, benzene, smoke); HEPA 12 + HEPA 14 layers ensure ultra-clean air.

The Burtran A31 is our flagship air purifier, engineered to deliver premium performance in both air purification and sleep wellness. Powered by Nano-Oxy™ technology and a 5-stage filtration system that includes True HEPA 14, the A31 captures ultrafine particles, neutralizes odors, and releases high-density negative oxygen ions for a fresher, cleaner environment. Designed for bedrooms, living rooms, and offices, it operates quietly, adapts intelligently, and promotes deeper sleep and easier breathing — making it the perfect companion for modern healthy living.

1 x A31 Nano-Oxy Air Purifier

1 x A31 Quick Start Guide


• Model: Burtran A31 Nano-Oxy™ Air Purifier
• Filtration: 5-stage (Pre-filter + HEPA 12 + Activated Carbon + Nano-Oxy
module + HEPA 14)
• Negative Ion Output: High-density small-ion & eco-grade ions
• CADR: 308 m³/h on PM2.5, 303 m³/h on TVOC
• Noise Level: 31 dB (Sleep Mode) – 53 dB (Max)
• Power: 55 W
• Control Panel: Capacitive touch with auto-lock
• Dimensions: 18.9 x 7.2 x 19.4 in (approx.)
• Weight: 17.5 lbs (approx.)

When health matters most, clean air comes first.

Experience medical-grade filtration and Nano-Oxy freshness in every breath.

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Why Burtran

Nano-Oxy Module

Proprietary negative oxygen ion technology (2,000–5,000 ions/cm³) delivers a refreshing, forest-like atmosphere—boosting energy, reducing stress, and improving sleep—without ozone, radiation, or static.

Medical-Grade HEPA 14

Captures 99.995% of particles as small as 0.1–0.3 µm, meeting the EN1822 standard and used in medical and cleanroom settings for superior filtration. Compared to HEPA 13, HEPA 14 reduces airborne particles by up to 90%, effectively removing allergens, smoke, dust, and mold to enhance air quality and ease allergy symptoms.

Advanced Smart Control

Features an intelligent display showing real-time PM2.5, TVOC, and NOI levels, plus filter life and Wi-Fi status. Includes a child lock, 6 fan speeds, and timer settings, with Auto and Sleep Modes for effortless use. The 4-angle adjustable outlet also lets it double as a cooling fan.

High-Efficiency Coverage

Certified & Lab Tested

Meeting the stringent EN1822 standard and commonly used in medical and cleanroom environments for its superior filtration efficiency,all Products are certified by FCC, ETL, and CARB.





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Frequently Asked Questions

Yes. Two indicator lights next to the power button serve as reminders—one for cleaning the Pre-Filter, and one for replacing Filters 2 & 3.

No, the unit does not include wheels.

Yes. The unit is equipped with retractable handles on both sides for easy transport.

It does not have a manual child lock button; however, the control panel automatically locks after 5 minutes of inactivity for safety.

The power cord is approximately 6 feet (1.8 meters) long.

The filter is designed to last up to 4,500 hours under normal conditions—approximately 6 months of continuous 24/7 use, or about 12 months when operated 12 hours per day. In environments with heavy pollution, smoke, or pet dander, more frequent replacement may be required to maintain optimal performance.



Yes! All Burtran products feature built-in Wi-Fi and app control (compatible with iOS and Android), enabling you to:

• Monitor air quality in real time
• Adjust settings from anywhere
• Get filter replacement alerts
• Integrate with smart home systems for voice control

Yes! We offer dedicated customer support at support@burtran.com along with comprehensive maintenance and repair services for all our air purifiers. Whether you need troubleshooting assistance, filter replacements, or hardware repairs, our team is here to keep your purifier performing at its best throughout its lifespan.

All our air purifiers include a standard two-year warranty that covers manufacturing defects and performance issues. For extra peace of mind, we also offer extended warranty options—helping you keep your air clean and fresh for years to come.

TVOC stands for Total Volatile Organic Compounds—a broad group of organic chemicals that easily evaporate into the air at room temperature. These gases are released from various solids and liquids and can affect indoor air quality and human health. Common examples include formaldehyde, benzene, toluene, and xylene.

PM2.5 stands for Particulate Matter with a diameter of 2.5 micrometers or smaller. These are tiny airborne particles made up of dust, dirt, soot, smoke, and liquid droplets—small enough to be inhaled deep into the lungs, where they can impact respiratory and overall health.

BURTRAN’s proprietary Nano-Oxy Module replicates this natural process indoors—safely and ozone-free. It releases 2,000–5,000 ions/cm³, recreating the refreshing “forest air” feeling in your home or office while supporting easier breathing, focus, and restful sleep.

They form when oxygen molecules in the air gain energy and capture free electrons—a process called air ionization.

This happens naturally through:

  • 🌩 Lightning and thunderstorms – high voltage energy splits air molecules.
  • 💧 Water movement – waterfalls, rain, ocean waves, and rivers create ions as droplets collide and break apart.
  • 🌳 Forests and plants – trees release ions during photosynthesis and from the tiny electric charges around leaves.
  • 🌞 Sunlight and natural radiation – UV rays and cosmic energy naturally charge the air.

Air with more Negative Oxygen Ions feels
cleaner and easier to breathe.

  • The World Health Organization considers fresh, healthy air to contain over 1,000–1,500 ions/cmÂł.
  • Levels above 2,000 ions/cm³—often found in forests or near waterfalls—are linked to noticeable wellness and mood benefits.

They’re sometimes called “Air Vitamins” forg ood reason. High concentrations of Negative Oxygen Ions can:

  • Purify the air by reducing dust, smoke, and formaldehyde.
  • Support breathing by improving lung function and easing allergy or asthma symptoms.
  • Promote relaxation by reducing stress, boosting mood, and improving sleep quality.
  • Enhance focus and energy, helping you feel more alert and refreshed.
  • Support wellness through antioxidant effects that help the body neutralize free radicals and strengthen immunity.

Negative Oxygen Ions (O₂⁻), also called Air Negative Ions, are oxygen molecules that have gained an extra electron—giving them a natural negative charge. They’re often found in abundance in forests, near waterfalls, or by the ocean—places that make us feel calm and refreshed.

Use only the genuine BURTRAN filter set, including the official Nano-Oxy filter, because generic filters may not produce the NOI readings accurately.

The pre-filter is washable, which helps extend the life of the main filters.
Tip: For best performance, monitor the filter life indicator and replace filters when prompted rather than delaying — especially in heavy-pollution zones.

According to the listing:

  • Operates on 100-240V AC (North America version).
  • Uses around 55 W power consumption.
  • Certified by FCC, ETL and CARB.
  • Two-year limited warranty included.

Yes — the purifier has the following features:

  • Digital display showing real-time PM2.5, TVOC, and “emulated NOI” levels, plus filter life and WiFi status.
  • WiFi connectivity and app control.
  • 6-speed fan setting, 6 timer options, Auto and Sleep Modes.
  • 4-angle adjustable air outlet (which also allows the purifier to act as a low-air-flow fan).



The Nano-Oxy™ module emits negative oxygen ions (NOIs) — the product page states these are “easily absorbed by the lungs and free from ozone, radiation, or static electricity.”  The goal is a “forest-like atmosphere” that supports breathing, mood, energy and sleep.
Note: While many users find the effect noticeable, results may vary depending
on room size, air quality, and usage patterns.