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Air Purification Technologies Comparison

This page contains quick explanations and criteria to help you decide what filtration method is best for a given problem. You should be familiar with the pros and cons for all the filtration and purification methods listed below.

Filters are the most common filtration method. In general, filters must permit some pollutants to pass with the airflow. The higher the efficiency or density of the filter, the lower the airflow and higher the restriction to the blower.


HEPA Filters

HEPA

Description

HEPA stands for high efficiency particulate air filter. HEPA filters utilize a powerful blower to force the air through a very tight membrane to achieve high efficiency particulate filtration.

Pros:

They are very efficient in the filtering of air that passes through the filter. They filter to .03 micron.

Cons:

They require filter changes. The filter can act as a breeding ground for bacteria, mold and fungus. They do not remove odors, gases, pesticides, viruses, and many bacteria. They reduce airflow due to the tight pores of the filter. They are generally not used in central systems, and sold as stand-alone units only.

 

Carbon Media Filters

Carbon Media

Description

Carbon filters consist of carbon impregnated filter fabric or granulated carbon. These filters usually have a foam or fabric filter to hold the media. Carbon has the unique capability of acting as a physical filter trapping particulate, and on a chemical basis by reacting with some odors and some of the heavy gases.

Pros:

Absorbs odor, absorbs some gases, filters particulate, installed in central or individual rooms.

Cons:

Requires frequent changes, acts as a breeding ground for microorganisms, can easily become blinded and ceases functioning. They reduce airflow.

 

Fiber/Foam Filters

Foam

Description

Fiber or open-cell foam filters rely on the air passing through a matrix of foam cells or fibers of fiberglass, wire, plastic or cloth. Typically, these filters only stop medium to large particulate.

Pros:

Low cost, low air resistance, installed in central units.

Cons:

They only filter the air that passes through the filter. The particle build-up can act as a breeding ground for bacteria. They only filter medium to large particulate.

 

Electrostatic Precipitators

Electro Static

Description

Electrostatic Precipitators have been used by industry for many years to clean up smokestack emission of particulate. They operated by electrically charging a field between metal plates. The air is charged with an electrical charge similar to static electricity. The charged particulates collect and coagulate on a second set of charged plates where they build up and fall to a collection tray.

Pros:

They are very effective on removing smoke from the air that passes through the filter. They do not reduce airflow as most other filters do. They can be installed in central units or in each room.

Cons:

They require frequent cleaning. They only filter the air that passes through the filter. The particle build-up can act as a breeding ground for bacteria.

 

Negative Ion Generators

Negative ION

Description

Negative ion generators have been used by industry for years to remove particulates from the air and to neutralize the effects of excess positive ions. Negative ions are produced electrically and travel through the air until they attract airborne particulate and coagulate the particulates until they are too heavy to drift and settle to the floor.

Pros:

They are very effective on removing smoke from the air. They travel throughout the entire room and purge all the air of particulate, not just the air that passes through a filter.

Cons:

They drop the particulates to the ground. They must be in each room as the ions cannot effectively travel through HVAC ducts.

 

Ozone

Ozone

Description

Ozone is a gas of oxygen ⎯ an oxygen molecule containing three atoms instead of two, like the oxygen we breathe. The extra atom of ozone is known as a loose radical that looks for organics to attach to and thereby oxidize. Ozone is known as a friendly oxidizer due to the fact that it reverts back to oxygen after oxidation occurs.

Pros:

Ozone is an oxidizing gas that travels throughout the room and oxidizes all organics. Ozone can neutralize odors and gases. Ozone destroys microorganisms and does not reduce airflow. Ozone units can be installed in central units or in each room.

Cons:

Ozone has no effect on particulate solid particles. Ozone exposure can be very dangerous at high levels.

 

Ultraviolet (UV) Light

UV LIGHT

Description

Ultraviolet light rays have been used as a sanitizer by the medical profession for years. Ultraviolet light can also sanitize air that is passed directly in its path with the proper exposure times.

Pros:

Ultraviolet light can destroy bacteria, fungus, molds and some gases. It does not reduce airflow.

Cons:

Ultraviolet light has no effect on particulate, needs direct close contact with a calculated exposure time, Ultraviolet light rays must be shielded from human exposure. UV Light has little to no effect on the conditioned space.

 

Photohydroionization (Advanced Radiant Oxidation Air Treatment System)

Photohydroionization

Description

An advanced oxidation technology patented by RGF utilizing broad spectrum HE/UV light targeted on a quad metallic target that produces Hydroperoxides that reduce microbes and gases in the conditioned space.

Pros:

A broad scope of oxidizers makes it extremely effective on a larger number of microbes and gases.

Cons:

Little effect on airborne particulates.

 

Advanced Radiant Oxidation Air Treatment System

Advanced Radiant Oxidation Air Treatment System









 

The Guardian Air Desktop is the latest in air treatment technology. The Guardian Air Desktop utilizes high intensity broad spectrum light waves directed on a sintered catalytic radiant grid that creates an advanced radiant catalytic air ionization that is radiated through a room in complete silence.

No fan   No moving parts
No maintenance  No filters
Ultra low operating cost  (only 11 watts)
Safe ions and oxidants silently travel throughout room
Oxidizes bacteria, mold, viruses and volatile organic compounds
Oxidizes gases and odors
Purifies the air up to 800 sq. feet (In 24 hours)
Provides clean fresh air

Actual lab tests showing over 96% reductions of airborne microbials.
Microbials, gases and odors
are oxidized and eliminated from the air we breathe.

Radiant Catalytic Ionization is effective on smoke, mold, mold and mildew odors, bacteria, viruses,
volatile organic compounds (VOCs), airborne particulates, cooking odors, pet odors, and restroom odors,

Specifications:

Electrical: 115 volt 11 watts

Dimensions: 6"w x 3"d x 12"h

Weight.: 2 lbs    Control.: On/Off

Material.: Polymers

Advanced Oxidation.: 01 ppm

Replacement PHI Cell.: (1) PHIC-5GA

USA (Entire) Priority Mail Delivery $399


Canada Priority Mail Delivery $409


International Postal Delivery
$449
 

 

Courtesy of http://www.rgfairpurification.com/product-comparison.html

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