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● In addition to combustion air, the engine also requires sufficient ventilation air to dissipate residual heat. The required volume of ventilation air is approximately the same as the necessary combustion air that is apox. 6.1 m3 per kW (4.5 m3 per cv) per hour based on a maximum air velocity of 3 m / sec. The design of are based on these principles.
● This type has an anodized polished aluminum frame with anodized aluminum grids
| Tipo | A (mm) | B = Cutout (mm) | C (mm) | D = Recorte (mm) | E = Cut radio (mm) | Flow area in dm2* |
| ASVREC20 | 300 | 2580 | 117 | 97 | R 48,5 | 0,83 |
| ASVREC30 | 360 | 340 | 130 | 110 | R 55 | 1,22 |
| ASVREC40 | 450 | 430 | 130 | 110 | R 55 | 1,59 |
| ASVREC50 | 490 | 470 | 146 | 126 | R 63 | 2,02 |
| ASVREC60 | 570 | 550 | 146 | 126 | R 63 | 2,41 |
| ASVREC70 | 590 | 570 | 159 | 139 | R 69,5 | 2,83 |
| ASVREC80 | 660 | 640 | 159 | 139 | R 69,5 | 3,21 |
*1 dm2 = 100 cm2
