Some Filter Data

Tri-Filter Media

At NerdLogical™, We use a carbon filter, then a HEPA, then a pleated teflon filter. Here's some polymer filter data to ponder:

C-100 Filter

 Filters employ coconut shell carbons with a very highly developed internal

 Surface area.  All various grades of activated carbons used in the filters of NerdLogical™

 Workstations are essentially of a non-crystalline structure produced by controlled oxidation of coconut shells.  Cellulosic structure of shell determines the efficiency of the adsorptive media, i.e. a very high internal adsorption surface that consists of a mass of millions of pores and capillaries of molecular dimensions.                                 


The various types of filters described below cover a wide range of applications. The C-100 filters for instance contain 10 or 15 kg of coconut shell carbon, the quality of which is described by reference to its total surface area and the ability of that surface to absorb a particular molecule.  The surface area is normally determined by the B.E.T. method using nitrogen as the adsorb ate and the adsorptive capacity by the weight of Carbon Tetrachloride adsorbed expressed as a percentage of the carbon's own weight.

The quality of the activated carbon in our C-100 filter is of 1100 to 1200 m2/gramme and CCI4 adsorption of 50 to 60 percent.

An estimate of the approximate capacity of the C-100 filter has been given in the Adsorption Index, which confirms suitability of the C-100 filter use with the substances indicated.  It is possible therefore to establish the approximate expected filter life following the indications of typical adsorption levels expressed in percentage of weight of contaminant related to the weight of the carbon in the C-100 filter.

The percentage given does not represent an indication of the affiance of the filtration itself but the approximate weight of the contaminant which can be adsorbed by the filter. The adsorption Degree A has been given to substances where 15-50 percent of the total weight of the carbon contained in the filter can be expected to be taken up in weight in the respective contaminant.  Adsorption Degree B has been given to substances where 5-20 percent of weight contaminant to weight of carbon is taken up. Adsorption Degree C is given for the maximum of 5 percent weight of contaminant to weight of carbon.


Activated Carbon Filters for the majority of aliphatic and aromatic hydrocarbons, solvents, organic vapors, aldehydes, keytones, alcohols, acids, esters, halogens and sulfur compounds, nitrogen compounds and odors.

The adsorption capacity of the carbon in the C-100 filter is dependent on the following operational factors:

a) Concentration of containment in feed gas

A high feed concentration will enable peak w/w pick up into the carbon.  Conversely trace levels of contaminant, and strict levels of output tolerance permit only lesser total w/w adsorption; this alone does not foreshorten the life of the carbon on account of the lower weight deposition rate onto the carbon (w/w=weight/weight)

(b) Temperature

Volatile contaminants will be understandably more difficult to adsorb at elevated temperature unless an impregnated carbon relying on chemisorptions is used.

(c) Pressure

Elevated pressure will reduce the volatility of a contaminant and accordingly increase the pick up potential.  This in turn may reduce the total quality of quality requirement of carbon for stipulated adsorptive efficiency.

(d) Moisture

Water content both in the gas stream and deposited in the carbon can have physical and chemical effects on pick up behavior.  High humidity is liable to impair the pick up of some acid gases and extend the effectiveness of certain chemisorptive operations.

Even those compounds given very low adsorption ratings may under special circumstances be effectively trapped onto carbon.  Special enquiry should be made when such contaminants are encountered.

NerdLogical™ Fiber Filter Technical Bulletin

NerdLogical™ Fiber Filter Technological Description:

NerdLogical™ Fiber Filter is a multi-graduated laminant of tough, variable denier synthetic fibers permanently bonded for extraordinary efficiency, tensile strength and durability.  The revolutionary structuring features pre-crimped fibers in laminates, each graduating downward in diameter, forming millions of intersticed funnel shaped dust and contaminant traps.  NerdLogical™ Fiber Filter Interceptor stations are arranged by design to arrest and permanently retain, in depth, all solid particulate matter in proportion to their micron size without interrupting uniform airflow.  For the first time, within in any filtration media, NerdLogical™ Fiber Filter combines the impingement, the strainer and the interception principles.

NerdLogical™ Fiber Filter Concept

                The two sided responsibility facing maintenance engineers, in our time of increased environmental air pollution, is both keep a healthful, comfortable indoor environment and maintain a responsible hold on maintenance cost.  NerdLogical™ Fiber Filters are the perfect solution to this problem.  Based on a new synthetic filter media, NerdLogical™ Fiber Filters can provide up to 300% more efficiency than standard filters while providing up to 300% greater service life.  Through a self-gasketing frame design and the elimination of any need for additional hardware, service costs are kept to a minimum, while providing a new standard in air filtration systems.

The Advantages of the NerdLogical™ Fiber Filter Concept

1.        Constructed of 100% Dacron fibers that are unaffected by moisture and humidity and will not break down in the air stream like fiberglass, or cotton fibers.

2.        Three times the efficiency and service life of fiberglass or poly disposable panel filters, and double the life of pleated panel filters.  Reduces change out frequency and inventory costs. NerdLogical™ Fiber Filter employs three principles of filtration in harmony to achieve high efficiency and dust holding capacity; impingement, interception, and straining.

3.        30% more filter area by utilizing 100% of the filter face area; eliminates hazardous bottle cap scrap retainers.

4.        Eliminates dirty-air-bypass through integral gasketing selvedge edge, unlike paper-framed filters.  Friction fit eliminates the need for additional holding clips.

5.        A non-toxic, non-allergenic, non-migrating tackifier is encapsulated between the last two layers of fiber assuring positive filter cake build-up.  Does not support or feed bacteria and fungal growth, as does paper framed filters.

6.        Unitized internal wire frame eliminates filter collapse and breakdown.  Heat sealed laminated construction eliminates fiber break-off, unloading, and possible contamination carry-over.

7.        Meets U.L. Class I & II rating (Ref. R6378).

 Media Cross Section

NerdLogical™ Antimicrobial System

                Air filers in commercial building, and residences are an essential component in establishing and maintaining indoor environmental quality.  Air filters, can be a barrier to microorganisms and at the same time can be an amplification site for microbial growth.  Test data from laboratory and field evaluations show clearly the utility and appropriateness of the NerdLogical™ Antimicrobial System as part of air filtration systems.

                The NerdLogical™ Antimicrobial System chemically bonds itself to an air filter and virtually destroys all microorganisms with which it comes into contact.  Reduces airborne microorganisms by up to 86.5% in one pass, as certified by Air Filter Test Laboratory.

                The NerdLogical™ Antimcrobial System is durable.  This long lasting antimicrobial system becomes an integral part of the air filter; thereby removing microbial contamination from recirculated air

 The NerdLogical™ Antimicrobial System checks mold and mildew odors soiling and staining.

                The NerdLogical™ Antimicrobial System is a powerful tool in dealing with key microbiological elements in the battle for improved indoor air quality.

                The NerdLogical™ Antimicrobial System is safe.  It is registered with the Environmental Protection Agency under FIFRA and FEPCA, as amended EPA #3429-1, and listed.

                The efficiency of filters treated with the NerdLogical™ Antimicrobial System is maintained, even when heavily loaded with dirt; AFTL tests demonstrate 86.5% microbial reduction in a single pass.  Levels below 10 CFU s/ft problem trigger level are reached in less than two air passes.

                The NerdLogical™ Antimicrobial System has an excellent safety profile, marked for years by Dow
Corning Corporation for healthcare products, consumer use products, and products used in commercial buildings.  An air filter treated with the NerdLogical™ Antimicrobial System is absolutely safe.

NerdLogical™ Fiber Filters Have Been Proven By:

á         Pharmaceutical Industries

á         Computer Centers

á         Electronic Industries

á         Lithography Industries

á         Food Processing Industries

á         Chemical Trades

á         Film Processing Planets

á         Schools and Universities

á         Hospitals

á         Laboratories

á         Commercial Buildings

á         Industrial Plants

á         Shopping Centers

á         High-Rise Apartments

á         Safety Industries



 NerdLogical™ has HEPA, HEPAMAX and ULPA filters are engineered for the critical removal of undesirable particles from manufacturing and controlling environments such as clean rooms, hospitals, pharmaceutical manufacturing, nuclear facilities, microelectronics, laboratories, semiconductor industry, food processing, etc.

Through our advanced technologies and the use of proprietary graduated density medias, NerdLogical™ has HEPA filters that are capable of removing 99.999% on 0.3 micron particles and 99.97 on 0.3 micron at flow rates up to 500FPM, while utilizing our depth loading process. This unique loading feature allows our HEPA and HEPAMAX filters to load particulate throughout the entire depth of the media resulting in longer service life

Adsorption Index for C-100 Filters


Aromatic Hydrocarbons                                     Aldehydes & Ketones                        Ethers

A    Benzene                                                          B    Acetone                                          B   Methyl

A    Napthalene                                                    C   Acetaldehyde                                                A    Propyl

A    Strene Monomer                                           B    Acrolein                                         HALOGENS

A    Toluene                                                          B    Acrylaldehyde                               A   Bromine

A    Toluidine                                                        A    Benzaldehyde                                A   Butyl Choride

A    Xylene                                                            B    Butyraldehyde                               A   Carbon Tetrachloride

ALIPHATIC HYDROCARBINS                        A    Caproaldehyde                              B   Chlorine

D    Acetylene                                                       A    Crontonaldehyde                          A   Chlorobenzene

B    Iso Butane                                                      A    Cycloheexanone                           A   Chlorobutadiene

B    Butylene                                                         A    Diethyl Ketone                              A   Chloroform

C    Butadiene                                                       A    Dipropy Ketone                            A   Chloro-Nitropropane

A    Cyclohexane                                                  C    Formaldehyde 1/                            A   Chloro Picrin

C    Heptylene                                                       B    Glutaraldehyde                              A   Dibromoethane

B    Hexane                                                            A    Mesityl Oxide                                A   Dichlorobenzene

C    Hexylene                                                         A    Methyl Butylketone                     B   Dichlorodiflluoro

D    Methane                                                         A    Methyl Ethylketone                           Methane

B    Petane                                                             A    Methyl Isobutylketone                A   Dichlorodifluoro

C    Propane                                                           B    Propionaldehyde                                 Ethane

B    Propylene                                                       A    Valeraldhyde                                 A   Dichlorethane

ACIDES                                                 A    Valeric Aldehyde                          A   Dichloroethlene

A    Acetic                                                             ESTERS                                 A   Dichloroethyl-Ether

A    Acetic Anhydride                                         A    Butyl Acetate                                A   Dichloromethane

A    Acrylic                                                            A    Cellosolve                                      B   Dichloromonoflluoro

A    Butyric                                                            A    Ethyl Acetate                                                       Methane

A   Caprylic                                                           A    Ethyl Acrylate                               A   Dichloropropane

A   Carbolic                                                           B    Ethyl Formate                 B   Dichlorotetrafluoro

B    Formic                                                             A    Isopropyl Acetate                              Ethane

A    Lactic                                                              B    Methyl Acetate                             B   Ethyl-Bromide

A    Palmitic                                                           A    Methyl Acrylate                           B   Ethyl Choride

A    Phenol                                                            B    Methyl Formate                             A   Ethylene Clorohydine

A    Propionic                                                        A    Propyl Acretate                             A   Ethylene Dichloride

A    Propylene                                                       ETHERS                                 B   Fluortrichloromerhar

ALCOHOLS                                                          A    Amyl                                               C   Freon

A    Ethyl                                                               A    Butyl                                               C   Hydrogen Bromide

A    Amyl                                                               A    Cellosolve                                      C   Hydrogen Fluoride

A    Butyl                                                               A    Dioxan                                            C   Hydrogen Iodide

A    Cyclohexanol                                 B    Ethyl                                                B    Iodine

A    Isopropyl                                                       B    Ethylene Oxide                               A   Iodoform

B    Methanol (Methyl)                                       A    Isopropyl                                       A   Methyl-Bromide

A    Propyl                                                             A    Methyl Cellosolve                        B   Methyl-Chloride

Adsorption Index  (Typical Weight/Weight Adsorption Levels)

A=Very Good 15-50%, B=Good, C=Moderate <5%, D=Poor 1%

1/=use C1-200 Filter, 2/=use C1-300 Filter, 3/=use C1-420 Filter, 4/=use SM Filter, 5/=use C1-410 Filter.