Product Details


This full set of replacement filters for the Dreval 7-Stage Air Purifier and Humidifier includes 2 double-sided filters:

  • 1 HEPA Filter
  • 1 Cold Catalyst Filter
  • 1 Non-Woven Fabric Filter
  • 1 Activated Carbon


HEPA Filter: eliminates mold, dust, allergens, and bacteria
Cold Catalyst Filter: absorbs and removes formaldehyde, benzene, and TVOC (total volatile organic compounds)
Non Woven Filter: absorbs and removes particles
Activated Carbon Filter: absorbs and removes odors and further removes toxic airborne pollutants


1 full set of 2 double-sided filters

Features and Benefits

How The 8-in-1 Removes An Amazing 99.99% Of Impurities! #1 | Pre-Filtration To stop large particles clogging your precision filters we start with an Aluminium Alloy Filter to capture dust, dander, pollen and toxins larger than 5 microns. #2 | Neutralize Chemical Gas The Cold Catalyst Filter removes bacteria, and toxic environmental gasses, from things like car exhausts, cleaning chemicals, new furniture, carpets, wallpaper and bedding. These chemicals include: formaldehyde, ammonia, benzene, xylene, toluene, TVOC, hydrogen sulfide and more. All that’s left over is safe carbon dioxide, and water! #3 | Odor Removal, and Gas Absorption While step #2 chemically catalyses toxic gasses, the Activated Carbon Honeycomb absorbs anything left over. This second line of defense, with it’s 98% absorption rate guarantees the 99.99% removal of all harmful gas. It’s also the first step in our Smart Odor Elimination. #4 | Large Microbe Removal To prevent large bacteria and microbes clogging your precision HEPA filter, we send them through the AntiMicrobial Cotton Filter. This traps and neutralizes 99% of microbes like airbone germs, micro-organisms and bacteria larger than 5 microns. #5 | Fine Particle Removal With True HEPA The HEPA Filter removes 99.97% of particles that are only 0.3 microns! That includes smoke, germs, allergens, bacteria, viruses, dust, and mold spores. You’ll be pleased to know, the World Health Organization, declared the Avian flu virus, influenza virus, and Legionella bacteria to be greater than 0.2 microns, obviously within the HEPA’s range. That’s why you see this filter around medical facilities, aircrafts, airports, offices and malls. #6 | Sterilization You choose if you want to activate the germicidal UV Sterilization Lamp. It kills bacteria, and viruses, and eliminates musty and bad odors leaving air fresh and pure. It’s the second step in our Smart Odor Elimination! Great for those with compromised immunity, after a nasty household accident, to sterilize kitchen surfaces, or remove stubborn odors . #7 | Purification Similar to the UV, you choose if you wish to activate the Negative Ion Generator. This electrical filter charges the air with anions and removes ultra-fine 0.01 micron particles. It is Ozone Free, and for those who know about the hazards of ozone, you’ll naturally be pleased. #8 | Humidifying Fill the water container and the Humidifier will start automatically. Obviously, if you suffer with skin, chest, throat, and nose complaints due to dry air, the Humidifier is welcome relief. This Is The Clean, Pure Air You Were Looking For With it’s Whisper Quiet fan, Smart Odor Elimination, and 99.99% Total Air Purification, the 8-in-1 is the obvious choice for all round performance, safety and functionality. So if you’re ready to finally experience a true breath of fresh air, and allow your family the chance to do the same, the DC-4850 is waiting for you.

Functions & Specs

UNIT SPECS: Covers room size 320 – 580sq/ft 110 Volts / 50Hz Noise Speed (Low) <20dB Unit Weight 27.56lbs Weight With Filters installed 34.17lbs Dimensions HxWxD: 24.41 x 15.75 x 9.06 x inches Water Tank Capacity 1 Liter Remote Control Instruction Manual 2 Year Warranty OPERATING FUNCTIONS: Place your unit at least 30cm away from walls for effective airflow. On / Off Auto Mode Sleep Mode Timer Adjust Wind Speed Adjust Negative Ion Generator On/Off UV Sterilization Lamp On/Off Clean Filter Alert (Filter #1, 320 hours and Filters #2-#5 1500 hours) Air Pollution Indicator Humidifier (auto start when water container filled) Child Lock FILTERS: CADR (Particulate and Formaldehyde) 1601.05 ft3/h Anion Concentration 1000million/cm3 Pre-Filter / Aluminium Alloy Filter Cold Catalyst Filter (Non-toxic, non-corrosive and non-flammable) Activated Carbon Filter AKA Honeycomb Filter, Efficient Formaldehyde Filter Antimicrobial / Antibacterial Cotton Filter (with active antibacterial agent) True HEPA Filter UV (Ultraviolet) Sterilization Lamp (365 nanometer UV wavelengths) Negative Ion Generator / Anion Producer (Ozone Free) Humidifier Mesh FILTER CLEANING & REPLACEMENT Replacement is simple with our pack of 4 filters (#2 - #5). Available here www.drevalair.com or here on Amazon. Cleaning instructions are in your manual. Clean Filter #1 twice a month, and replace every 2-Years. Clean Filters #2, 3, 4 and 5 once every two months and replace 6-12 monthly. Clean Filter #7 only when you hear a creaking / mechanical sound. Clean Particle Sensor once every 2 months. IMPORTANT: Do not place fragrance in water container, it 100% will damage your unit.