More Info On The GermGuardian AC4825

GermGuardian AC4825 True HEPA Air Purifier: The 3-in-1 filtering system keeps away unwanted odors, keeps air clean, and helps thwart harmful breeding of bacteria and mold. With an indicator light, this best air purifier is always aware when to change out filters to help the purifier function optimally.

Slim profile – quiet on the first two settings – third setting the noise of the fan is noteworthy – It has UV light and is “True HEPA” — if one could possibly repeat the purchase, people would have been willing to shell out more money and purchased the Germguardian Elite 4 in 1 – the UV light in the elite is brighter and effective – it is an elongated tube as opposed to the the Germguardian AC4825 which is merely a small bulb

Compact bedroom capacity – The 155 sq. ft. room capacity conveniently recirculates fresh air continuously completely through a single, compact bedroom.

Be aware when to change a filter or bulb – A light indicator switches on and glimmers when the filter or UV-C bulb is in need of replacement.

Helps to eliminate airborne disease-causing microbes and eradicates odors – The UV-C light functions effectively to eradicate airborne microbes and bacteria, while also lessening usual household stench emanating from domesticated pets, cooking and smoking.

Helps thwart bacterial growth – A charcoal filter helps to effectively limit and thwart the growth of bacteria, microbes, and mold.

Low noise – Noiseless operation helps keep the volume of noise to a minimum level.

True HEPA filter – This helps in capturing nearly 99.97% of dust and allergy causing particles. There are varying levels of capturing and cleaning out allergens, eradicating airborne microbes and bacterial pathogens.

Energy star certified. There is a limited warranty on labor and parts of the product for a period of 3 years.

An air purifier is an essential gadget because it purifies indoor by removing pollutants including dust, volatile organic compounds (VOCs), as well as allergens such as pet dander. However, only a quality best air purifier can effectively improve the quality of indoor air. Below is some more information on this topic.

#2 – Honeywell HPA300

Honeywell air purifiers are considered by doctors as a crucial part of a total allergy treatment program. The most effective air purifiers retain 99.7% of the tiny particles (0.3 microns and greater) that go through their filters. Honeywell HPA300 is capable of retaining airborne particles such as dust, pollen grains, smoke emanating from household activities, pet dander and mold spores. Certain models have passed a test to trap disease causing germs from air passing through air filters.

These air filtering products utilize a mechanical filtration process — which means that a fan sucks in particle-laden air into the compact unit and makes air pass through a Honeywell HPA300 filter, cleaning and recirculating air in a room multiple times an hour. And, Honeywell True HEPA air purifiers do not recirculate ozone back into air after the filtration process is complete, making them the perfect air purifier for patients suffering from breathing difficulties.

1. A silent fan sucks room air into the compact unit, circulating and cleaning the air multiple times an hour.

2. Air then goes through an stench absorbing pre-filter to lessen unwanted odors and trap big particles like dust, pet dander or lint.

3. Air passes through highly effective True HEPA filters that capture up to 99.97% of particles, 0.3 microns or larger, from the air that passes through.

4. Clean, fresh quality air is recirculated back into the room.
Every Honeywell model is about 99.97% effective in capturing microscopic harmful particles, 0.3 microns or greater, from the air that goes through.

Easy tap electronic controls with about three levels of air cleaning added with Turbo Clean setting & 2, 4, & 8 hour timer. Electronic replacement reminders are an added bonus.

A majority of physicians that suggest a brand of best air purifier for treatment prefer the Honeywell brand.

#3 – Germ Guardian AC5000E

The GermGuardian AC5000E is a 28-inch tower that offers multiple levels of cleaning in order to provide fresh and clean air to breathe in. Not only does it kill airborne bacteria and viruses, but it also gets rid of allergens, odors and mold spores in air. Rated 125+ by CADR, the air purifier works very well in medium to large rooms. What’s impressive about the GermGuardian is that it is capable of running in an ultra-quiet mode, thereby making it ideal for use during sleeping hours as well.

The True HEPA filters of AC5000E captures at least 99.97% of the allergens present in air. This includes household dust, mold spores, pollens from plants, pet dander and even particles that are as small as 0.3 microns (in terms of size). By getting rid of up to 99.97% allergens, the filter improves air quality drastically. What’s more, it is not just one layer of filtering from the True HEPA filters because the device has a Charcoal present inside too, which reduces the odors and conducts its level of cleaning. Then there is the pre-filter which captures the larger particles present in air, like pet hair and lint.

Another unique feature of the GermGuardian AC5000E which makes it so worthwhile is its UV-C light feature. UV-C light is something that is used in hospitals for the purpose of sanitizing. It has been proven to kill airborne viruses and bacteria by permanently damaging their DNAs. Also, it does not emit ozone.

There are many reasons to get the AC5000E. Not only does it make a great addition to your home but it also works very well as a gift, especially for smokers. Also, the filter is very low maintenance because it is easy to clean. One simply has to take out the filter and wash it in the sink. After that, just allow it to air dry and pop it back into the filter and you’re good to go!

#4 – Coway AP-1512HH

The powerful Coway AP-1512HH Air Purifier is designed to fit a relatively small space, but comes along with sophisticated aspects to help keep the indoor air free of impurities. Assembled with a HEPA efficiency success of nearly 99.97%, it utilizes a four-stage filtration system to be effective in eradicating odors and indoor air pollutants. This robust machine comes with an air quality indicator through the particle sensing technology that will enable the air purifier to function at a high capacity when the need arises. And when air pollution is not indicated for half an hour, the fan will stop all by itself to conserve energy.

Brilliant, cutting edge Technology – The fan automatically controls the flow of air when air pollutants are indicated in air, allowing people to have mental peace that the indoor air quality of the room is always under watch.

Air Quality Indicator – The sensitive Air Quality Indicator makes use of particle sensor technology to control and sense the indoor air quality, and responds with a sharp and noticeable change of color to indicate the present condition of the air.

Filter Change Indicator – When it’s about time to replace the air filter, the Coway Filter Change Indicator will illuminate; making sure that purified air is always in circulation. Always replace the Carbon filter about semi-annually and the HEPA every year.

The Coway AP-1512HH can be shipped within the U.S territories, and not eligible for international shipping, and must be shipped separately from other products contained in the order.

The product has 5 settings, with an ionizer as an option for each of the settings. There’s a low, medium, and high setting, with low being the really quiet mode letting out a light breeze, medium being a soft noise equivalent to a car fan on maximum setting, and high being an fan sound easily heard, compared to the sound of a functioning refrigerator.

#5 – Winix WAC9500

The Winix WAC9500 is a home air filtration system designed for home use. It also makes a great filtration system for pet owners, who want to reduce hair, dander, and pet odors in the home. This home air purifier runs on two AA batteries. there is no need to look for an available outlet. It’s designed for use in a single room, with HEPA filtration, washable pre-filter, and washable carbon filter. The technology behind this machine is plasmawave, which uses charged ions to draw odor and dust particles from the air. Controls can be operated from the appliance or from a remote control device. It also features an LED alert, indicating the filter needs to be changed.

Buyers say the purifier works as it should, in an average sized room. Some users can’t sleep near the machine, as it dries out the air too much A solution is to move it several feet from the sleeping area. Buyers are happy with the machine’s overall performance. It removes pet odors and smoke in a sufficiently short time. Allergy sufferers have had success using this device at night. Some customers mention the one year warranty. Buyers must pay for return shipping, as with most products purchased online.

The Winix WAC9500 has received very few complaints. One customer had to return a non-functioning unit after 7 months of use. Another customer took the machine apart to clean it, indicating it does a poor job of removing dust particles. a few buyers say it does a poor job of filtering pet hair. Overall, buyers are happy with the machine’s performance and price. There are no operating costs, other than the 2 AA batteries. At 16 x 21 inches, the unit is small enough to sit on a table, dresser, or counter top, if additional space is available.

How Air Purifiers Work

In general, air purifiers use fine sieves called air filters to trap and remove contaminants from the air. As such, air purifies with finer sieves are generally more efficient because they are able to trap smaller pollutant particles. Examples of indoor air pollutants include pathogens, bacteria, viruses, antigens, bad odors, toxins, irritants and VOCs. With this in mind, the US Department of Energy (DOE) has set air purification benchmarks that manufacturers of air purifiers must meet. For instance, air purifiers based on HEPA technology must remove at least 99.97% of air pollutants larger than 0.3 microns. A micron is a unit used to measure the size of air particles and it is equivalent to 1/25,400 of an inch. Other common air purifying technologies include Thermodynamic Sterilization (TSS) and Ultraviolet Germicidal Irradiation (UVGI).

Some of the key factors to consider when shopping for air purifier include:

1. Type

There are basically two types of air purifiers: room air purifies and whole-house air purifiers. The former is typically smaller and less expensive compared to the latter. According to Consumer Reports, a room purifier is the right choice if your home does not have a forced-air heating/cooling system or if you are shopping for an air purifier that you can move from room to room. On the other hand, a whole-house air purifier is the ideal choice if your home has a forced-air heating system. At this point, it is worth mentioning a sub-category of room air purifiers called dedicated ozone generators that are designed to emit an appreciable amount of ozone. However, the US Environmental Protection Agency (EPA) warns consumers to avoid such air purifiers because ozone can damage the lungs and worsen chronic respiratory diseases such as asthma when inhaled. Healthy people can also experience breathing problems after inhaling ozone. In addition, a study published in the New England Journal of Medicine found that exposure to even low levels of ozone increases the risk of developing serious health conditions including pneumonia and chronic obstructive pulmonary disease.

2. Air filtration technology

Commercially available air purifiers vary largely depending on the type of air filtration technology deployed. Presently, HEPA technology is probably the most widely used technology in air purifiers. This technology was originally developed by the US Atomic Energy Commission to remove radioactive dust particles from the air. HEPA filters are made from finely woven glass particles that form a pleated surface area for trapping air pollutants larger than 0.3 microns. Although HEPA filters are highly effective, they are expensive because they require replacing after 12 to 18 months depending on usage. The cost of a single HEPA filter ranges from $70 to $125. Moreover, the dense structure of HEPA filters means they are not as energy-efficient as other types of filters.

Besides HEPA technology, some air purifiers use Ultra Low Penetrating Air (ULPA) technology. Simply put, ULPA is a stricter version of HEPA air filtration technology that was developed for use in hospitals and “clean rooms” such as those found in the semi-conductor manufacturing sector.

Another category of air purifiers use activated carbon filters to remove air pollutants found in indoor environments. To achieve this goal, they rely on carbon treated with oxygen thereby opening millions of tiny pores that are ideal for absorbing/bonding with pollutant particles. Air purifiers that use charged media filters in essence rely on two technologies: an electrostatic charge generator and a particle filter. Unlike air purifiers with HEPA filters, those with charged media filters can trap particles as small as 0.1 microns. The downside is charged media filters lose their efficiency quickly. Some manufacturers produce air purifiers that use antibacterial and germicidal filters, which are simply HEPA filters treated with chemical compounds that can kill harmful microorganisms such as bacteria.

Photocatalytic oxidation (PCO) is another type of air filtration technology that is based on a metal plate coated with titanium dioxide and uses UV light to break the chemical bonds that hold pollutant molecules together. Other types of common air filtration technologies include electrostatic precipitator, ion generator, photoplasma, polarized media electronic and titanium dioxide air filtration technology.

3. Size

The size of an air purifier is calculated using the Clean Air Delivery Rate (CADR) metric, which was developed by the Association of Home Appliance Manufacturers (AHAM). In essence, CADR is a metric based on the amount of cubic feet of air an air purifier can filter per minute. As such, a high CADR figure means a more efficient air purifier and vice versa. To calculate the CADR for a room, multiply its square footage by 0.75.

4. Features

The features of an air purifier typically vary depending on the product size, model, and brand. Still, one of the most common and useful features is a fan for sucking in air. An article published by Consumer Reports states that air purifiers without fans tend to work poorly compared to purifiers with fans. Another useful feature is a servicing indicator to alert you when it is time to replace key parts such as the air filter. Other key features found in air purifiers include a dust sensor, UV-C sanitizer, filtering frequency controller, and air quality monitor. Fortunately, consumers can use product comparison sites to evaluate and compare air purifier features. This is in addition to comparing the prices of different air purifiers.


Some of the key considerations when shopping for an air purifier include the air filtration technology, size, type and features. Most of the air purifiers on the market today use High Efficiency Particulate Air (HEPA), Ultra Low Penetrating Air (ULPA), activated carbon filter, charged media filter, antibacterial and germicidal filter, photocatalytic oxidation, ion generator, ozone generator, electrostatic precipitator and titanium dioxide air filtration technologies. However, you should, avoid air filters that use ozone generator filters because they tend to increase the risk of developing respiratory diseases.