What is a G4 grade filter?
A coarse G4 filter is designed to capture pollen, fog and coarse dust particles (≥10μm). It also captures leaves, insects, textile fibres, sand, ash, mist and hair. 0.4μm and larger particles include mould & plant spores, pet dander, textile dust, skin flakes, yeast cells, insecticide dust and most bacteria.
What MERV rating is G4?
Air filter selection chart and Performance Ratings
| Australian Standard Ratings: AS1324.1-2001 & AS4260-1997 | U.S. MERV Ratings: ASHRAE 52.1 & 52.2 | |
|---|---|---|
| G1 G2 | <65% 65%-80% | MERV 1-4 |
| G3 | 80%-90% | MERV 5 |
| G4 | >90% | MERV 6-8 |
| F5 | – | MERV 8-9 |
What is G4 efficiency?
Classification of Coarse, Medium and Fine filters according EN 779:2012
| Filter Class | Final Test Pressure Drop | Average Efficiency (Em) of 0.4 µm particles |
|---|---|---|
| G4 | 250 | – |
| M5 | 450 | 40% ≤ Em < 60% |
| M6 | 450 | 60% ≤ Em < 80% |
| F7 | 450 | 80% ≤ Em < 90% |
What are the grades of filters?
Filter Guide
| Filter Grade | EU Grade | Efficiency/Arrestance |
|---|---|---|
| F8 | EU8 | 90-95% Efficiency |
| F9 | EU9 | 95% Efficiency |
| H10 | EU10 | > 95% Efficiency @ 0.3 µm |
| H13 | EU13 | > 99.997% Efficiency @ 0.3 µm |
What is EN779?
The EN779:2012 standard used today in Europe to characterize the filtration efficiency of the filters for the ventilation of buildings defines the filtration classes according to the average filtration efficiency of the particles with a diameter of 0.4 µm (see Table 1 below).
Is h13 the same as MERV 13?
A HEPA filter is essentially the ultimate solution in the air filter world and far exceeds what a MERV 13 is able to do. All HEPA filters have a rating of a MERV 17 or higher.
What are 30% filters?
For instance, a 30% filter (based on arrestance) means that 30% of the weight of the dust has been captured. Depending on the size of the dust particles the actual number of particles (and hence the percentage of particles) captured may be substantially less.
What are F7 filters?
F7 ProSyntex air filters are manufactured using a three stage filter system to deliver a class-leading, energy efficient clean air solution. They are the pocket filters of choice for leading AHU manufacturers, facilities management companies and major brands throughout the UK.
How are air filters classified?
Air filters are classified on the basis of their filtration efficiency measured under defined standard conditions in relation to a defined test dust or aerosol.
What EN779 2012?
EN779:2012 is the new European Standard for air filters and will come into effect by the end of 2012. EN779:2012 only calls for Minimum Efficiency on filters of grades F7 to F9 and to clearly define this, filters previously classified as F5 and F6 are now changed to M5 and M6 in a Medium Filter Category.
What is ePM filter?
Filter Classes According to ISO 16890 The new standard determines arrestance over a spectrum of particulate sizes. Filter Group. Particulate Size (μm) Classification Criterium. *ePM = efficiency Particulate Matter.
Can a filter be operated according to EN 779?
Because of this the test results according EN 779 do not provide a basis for predicting either operational performance or life. Depending on their design, filters can be operated under actual site conditions to higher final pressure drops than those given here. Poret ® – the No. 1 Coalescer Media!
What are the results of the EN 779 standard?
The EN 779 Standard is based on laboratory test (made with test aerosols and test dusts) so the results are transferable to actual applications only with very restricted relevance. The principal results of the EN 779 Standard laboratory test are: Gravimetric arrestance efficiency for synthetic dust
What is the European standard for air filters?
This European standard is applied to air filters with an initial efficiency below 98% for 0.4 micron particles. Filters must be tested with an air flow rate between 0.24 m³/s (850 m³/h) and 1.5 m³/s (5400m³/h). This new regulation was approved in March 2012 and implemented in Italy in June 2012.