3 - Ordem dos Engenheiros

11.as Jornadas de Climatização
Edifícios com Necessidades Quase-Nulas de Energia e com Boa Qualidade do Ar Interior
NORMAS ASHRAE 52.2
Minimum Efficiency
Reporting Value
(MERV-A)
Composite Average Particle Size Efficiency in
Size Range, %
Range 1
(0.3–1.0μm)
Range 2
(1.0–3.0μm)
Range 3
(3.0–10μm)
Average Arrestance
1 - A E3–A < 20 A avg < 65
2 - A E3–A < 20 65 ≤ A avg < 70
3 - A E3–A < 20 70 ≤ A avg < 75
4 - A E3–A < 20 75 ≤ A avg
5 - A 20 ≤ E3–A < 35
6 - A 35 ≤ E3–A < 50
7 - A 50 ≤ E3–A < 70
8 - A 70 ≤ E3–A
9 - A E1–A < 50 85 ≤ E3–A
10 - A 50 ≤ E2–A < 65 85 ≤ E3–A
11 - A 65 ≤ E2–A < 80 85 ≤ E3–A
12 - A 80 ≤ E2–A 90 ≤ E3–A
13 - A E1–A < 75 90 ≤ E2–A 90 ≤ E3–A
1 4- A 75 ≤ E1–A < 85 90 ≤ E2–A 90 ≤ E3–A
15 - A 85 ≤ E1–A < 95 90 ≤ E2–A 90 ≤ E3–A
16 - A 95 ≤ E1–A 95 ≤ E2–A 95 ≤ E3–A
EN779
Classe
07-10-2011 30
%
G1
G2
G2
G2
G3
G3
G4
G4
G4
M5
M6
M6
F7
F8
F9
-