Field Controls Trio Portable 110V 60 Hz Air Purifier Field Controls Trio 1000P Portable, a top quality 3 in 1 hospital grade HEPA air purifier, that dramatically & efficiently reduces particles, VOCs, & germs in the environment; therefore, keeping you and your family healthy at all times. Coverage: 1000 sq feet.  Patented PRO-Cell technology significantly reduces VOCs (by over 98% in just a few hours) and odors.  The Trio 1000P Portable maximizes air purification by using a 4 stage filtration system that is fully electronic.  An air purifier with a brain to tell you when the air needs great filtration and when it doesn't.  Even has a quiet mode.Some clever entrepreneurs out of Beijing have developed a DIY air purifier that's cheap and quite effective, according to tests, so that you don't have to burn a hole through your pocket and/or esophagus in this great land of smog that many of us lovingly call home. The purifiers are constructed out of fans and HEPA filters purchased from Taobao and are sold in kits on the web site.

The most basic kit goes for 200 RMB and boasts a 92 percent rate of effectiveness at reducing PM2.5 particles, based on eight-hour tests in a 15 square meter bedroom. The Cannon kit, recommended in larger spaces, goes for 450 RMB has a 96 percent rate of effectiveness. The site also offers links for customers to buy HEPA filters and fans on their own, because they're good guy researchers who just want people to know that expensive (some go as high as 11,000 RMB) store-bought filters are not necessarily the best. We're more committed to spreading the knowledge that HEPA filters are a cheap way to effectively combat air pollution than we are to making money, so we'd never discourage anyone from buying the same parts elsewhere. We just try to make the parts easier to get for people who don't want to scour Taobao for the cheapest filters. Note that a recent increase in demand from Shanghai has backed up orders on the web site. Got something to share? all our citiesone convenient app

Open external links in tabsThe Honeywell Enviracaire 50250 is ideal for removing dust and allergens from small rooms up to 340 square feet. This inexpensive true HEPA air purifier is a customer favorite and can be used just about anywhere you need it. Packed with features, it offers unique 360-degree air discharge, simple controls, and three purification speeds. Use it to clean and replace the air in your room up to five times per hour. An included permanent HEPA filter removes 99.97% of common household particles as small as 0.3 microns, such as dust, pollen, mold spores, and pet dander, so you can breathe healthier day after day. In addition, independent lab tests have shown that the Honeywell Enviracaire 50250 Air Purifier helps reduce airborne germs, bacteria, and viruses with up to 100% efficiency. It also has a carbon pre-filter to remove tobacco smoke and other odors in addition to airborne particles. A lightweight design (20 pounds) and carrying handle make it easy to move the Honeywell 50250 wherever you need it.

Its patented 360-degree air intake and discharge system maximizes efficiency and allows you to place it in any part of your room.ionizer air purifier sinus Three Speeds: Choose the speed you want to purify your room based on your needs and desired room level (low, medium, or high).sta-med electronic air cleaner Check Filter Indicator Light: Notification lights turn on when it’s time to clean your HEPA filter or replace your carbon pre-filter.room air purifier ozone and ionizer SurroundSeal Technology: Helps minimize air leaks and ensure that all air that passes through the filter is cleaned of particles and impurities. AHAM-Certified: The Honeywell Enviracaire 50250 Air Purifier is certified by the Association of Home Appliance Manufacturers (AHAM), which means its performance has been independently tested and verified.

Impressive CADR Ratings: This model has a Clean Air Delivery Rate (CADR) of 250 for dust, smoke, and pollen removal, which is ideal for spaces up to 390 square feet. Honeywell 50250 Air Purifier provides affordable HEPA filtration and compact design, making it a customer favorite for rooms up to 340 square feet. No Hassle Air Cleaning: You won’t find an easier air purifier to use, transport, or maintain. 360 Degree Design: It efficiently pulls in air from all directions as opposed to most who pull from one spot. Odors: While this model has carbon in the pre-filter, you should consider another model if getting rid of odors is a main concern for you. Honeywell 50250 Air PurifierCheck out the new SourceForge HTML5 internet speed test! No Flash necessary and runs on all devices. Grad Student Rigs Cheap Alternative To $1,000 Air Purifiers In Smoggy China An anonymous reader writes "University of Virginia grad student Thomas Talhelm was living in Beijing on a Fulbright Scholarship during the winter of 2012-13, when air pollution was so bad scientists likened it to a nuclear winter.

Those who could afford it were resorting to an expensive solution: air filters costing up to $1,000. Talhem built his own on the cheap, getting comparable particulate count results, and has started a company that both markets the product to middle class Chinese and shows others how to DIY."About HEPA Air Filtration HEPA air filters are largely considered the most effective type of air filter for solid particles, such as dust and other allergens. HEPA air filters are made from very tiny glass fibers that are made into a tightly woven paper. This creates a filter consisting of a multitude of very small sieves that can capture extremely small particles, including some biological agents. Once trapped, contaminates and particles are not able to flow back into circulation, due to the highly absorbent pores of the HEPA air filter. HEPA Air Filter Facts and Studies developed by the Atomic Energy Commission recommended by the U.S. Dept. of Homeland Security. Air & Waste Management Association

HEPA filters are recommended by the Mayo Clinic for allergy proofing the home. In a study by the UK Lung Research Centre, HEPA air cleaners significantly reduced airborne cat allergen particles when the purifier was used with a cat in the room. In a study by the Environmental Health Sciences Department at the University of Michigan, HEPA air purifiers reduced the level of fine particulate matter in the air (such as cigarette smoke), by 30-70%. The particulate level was measured in the room where the air purifier was running, and the fan speed was set to medium, since users often run their air purifiers at a lower level when they are in the room. What to Look for in a HEPA Filter Make sure it is a "True" HEPA filter, and not just "HEPA-like". All Surround Air purifiers include a True HEPA filter. Make sure the HEPA air purifier comes with a germicidal UV lamp, otherwise, your HEPA filter could become a breeding ground for microbes with all the particulate it will capture.