We are coming back to the offices! How should building managers ensure a proper air filtration system? We are all trying to return to our “old” pre-epidemic life. Despite the fact that the current state in our country is still ongoing and special sanitary procedures have been implemented, we are trying to resume our work …
Will changing the filtration class from G4 (ISO Coarse) to F7 (ePM2.5) result in better protection against pollution? Will changing the filtration class from G4 (ISO Coarse) to F7 (ePM2.5) result in better protection against pollution? Let’s start by explaining what are filters in class G4 (ISO Coarse) and F7 (ePM2.5) and what are their …
Will replacing pocket filters with HEPA filters improve air quality and protect us against viruses? Pocket filters are divided into preliminary G4 (ISO Coarse) and fine M5 (ePM10); F7 (ePM2.5) and F9 (ePM1). The role of pre-filters is to remove larger contaminants visible to the naked eye, while fine filters are responsible for protecting our …
ISO 16890-1: 2016 is an international standard that relates to the testing and classification of air filters. It replaced the EN779: 2012 standard, which was based on measurements of 0.4μm particle filtration efficiency. The new standard takes into account filtration efficiency to the range of solid particles (PM) from 0.3μm to 10μm. Classification according to …
Should I increase the frequency of replacing air filters due to COVID-19? We recommend replacing the filters according to the current schedule in your facility. It is possible to increase the protection against the virus by using a multi-stage filtration process using ePM2,5, ePM1, or HEPA fine filters. HVAC installations have one to several degrees …
Syndrom chorych budynków – czym jest i jak temu zapobiegać stosując odpowiednio dobrany system filtracji? Have you ever heard the term Sick Building Syndrome (SBS)? SBS is a group of health symptoms related to staying in a room/building. The immediate cause of this syndrome is irregularities related to the indoor climate. There are over 50 …
Division of high-efficiency filters in terms of efficiency The standards according to which HEPA filters are tested are PN-EN1822: 2012 and ISO 14644-3 – PN-EN1822: 2012 – concerns methods of testing parameters, testing, and classification of EPA, HEPA, and ULPA filters at the manufacturers of these filters. – ISO 14644-3 – refers to the test …
Turbulent vs laminar airflow in HEPA filters If you choose the right HEPA filter for your application, an important element is to determine the airflow method – turbulent or laminar. Laminar airflow is one in which the airflow flows in parallel streams without interference. However, in the case of turbulent flow, the air can be …
Construction of the HEPA filter – what are the variants and applications HEPA filters are made up of 6 main components and may vary depending on the application. Here are some options: – Filter fiber: pleated glass paper – minipleat; – Frame: aluminum, MDF galvanized steel, stainless steel; – Adhesive: polyurethane, silicone, ceramic; – Separators: …