News & Updates.

A matching HEPA class and outside size do not guarantee a matching installation. Compare gasket and gel seals, identify the mating interface, and prepare a replacement specification that can be checked against the housing.

How to read Camfil Absolute VG, VGXL and VGXXL type codes, which EN 1822 class, size and airflow each stands for, and how our AR303 V-bank HEPA filter compares when a specification says “Absolute VG or equal”.

How AR504 encapsulated carbon media works, why the target gas determines the media choice, and how to assess airflow, pressure drop, breakthrough and replacement for gas-phase filtration.

A practical guide to AR208 coastal intake filtration: how the two-layer glass-fibre construction is described, how to read airflow and pressure-drop data, and what evidence to request for humid, salt-laden air.

A HEPA filter is not a fine sieve. Where the idea came from, how glass fibres catch particles smaller than the gaps between them, why the hardest particle to stop is about 0.1–0.3 µm, and what decides performance once the filter is installed.

How Viledon Compact T pocket filters and MaxiPleat MX cassette filters compare with our synthetic pocket filter and V-Cell filter: ISO 16890 classes, sizes, airflow and what to confirm before you switch.

How AAF's DriPak 2000 pocket filter and VariCel box filter compare with our synthetic pocket filter and W-Cell filter: MERV grades, sizes, depths and what to confirm before you switch.

How to read Camfil Opakfil ES types ES6 to ES9, which ISO 16890 class and size each stands for, and how our V-Cell compact filter compares.

How to read a Camfil Hi-Flo item code, which ISO 16890 class and size it stands for, and how to order a glass-fibre pocket filter built to the same size, depth, pocket count and class.

Why one air handling unit takes 592 × 592 mm filters and another takes 24 × 24 in, how nominal and actual sizes differ, and what to measure before ordering replacements.

H13 filters stop at least 99.95% of particles at the most penetrating particle size; H14 filters at least 99.995%. Here is what the EN 1822 classes mean and how to choose between them.

The three main HEPA constructions suit different places: mini-pleat panels for ceilings and FFUs, V-bank and box filters for high-airflow AHUs, separator filters for rugged or hot duty.

ISO 16890 replaced EN 779 and rates filters by how much of each particulate-matter fraction they remove. This guide explains the groups and how they roughly compare with F-classes and MERV.

Replace filters by pressure drop and performance, not by the calendar. What the standards say about final pressure drop, what an overdue filter costs in fan energy, and how to plan a clean change-out.

The number of FFUs follows from the cleanroom class, room size and required air changes or downflow velocity. A worked example and typical design ranges.

What ISO 5, 6, 7 and 8 mean in particles per cubic metre, and how the filtration train — prefilter, medium-efficiency filter and HEPA — is built for each class.

Airborne molecular contamination passes straight through HEPA filters. How it is classified, why ammonia and acids matter to wafers and electronics, and how activated carbon and impregnated media are selected.

Sea-salt aerosol corrodes coils, electronics and products. Why coastal sites need dedicated salt filters, and how to build a filter stage that stays effective in humid air.

Choosing a HEPA terminal starts with the cleanliness class and airflow, then the unit type, layout, noise, ceiling and maintenance access. A step-by-step guide with the standards behind each step.

Which filters can be washed and how, how to clean the air handling unit during a change, and a step-by-step procedure for replacing and verifying HEPA filters.

How well HEPA terminals are installed decides whether a cleanroom reaches its class. What to check on the specification, the room, the system, the delivered filters and the finished installation.

Air handling systems use filters in stages. What coarse, medium-efficiency and HEPA filters each do, the formats they come in, and where each is used.

From hospital hygiene to semiconductor fabs: how cleanrooms evolved, why pharmaceutical GMP drove stricter standards, and what it means for filtration today.

Where air filters are used — HVAC, cleanrooms, gas turbines, vehicles and industry — and the forces shaping what buyers ask for: air quality, energy, regulation and documentation.