BURTRAN A31 H14 HEPA Air Purifier for Home Large Room Bedroom up to 1360ft²,Ultra-Quiet Sleep Modes, Nano-Oxy Negative Ions,PM2.5 & TVOC Smart Monitor, 5-Stage Filtration,WiFi,Sleep Support

It uses a multi-stage system including:

• A HEPA 14 filter, which captures 99.995% of particles as small as 0.1-0.3 µm (meeting cleanroom/EN1822 standards).
• A TVOC/activated carbon layer for gases, odors and volatile organic compounds (VOCs).
• A washable pre-filter for large particles (pet hair, dust) to extend filter life.
• A proprietary Nano-Oxy™ Module releasing negative oxygen ions (NOIs) at concentrations of ~2,000-5,000 ions/cm³, intended to enhance air freshness.

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.

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).
  
  
  
  

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.

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.

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.

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.

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/cm³.
• Levels above 2,000 ions/cm³—often found in forests or near waterfalls—are linked to noticeable wellness and mood benefits.

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.

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.

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.

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.

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.

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.

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

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.

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

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

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