trickle ventilator
Posted: Sun May 29, 2011 4:33 pm
Hi,
To provide the background ventilation, trickle ventilator of 4cm2 opening area per m2 floor area to satisfy fresh air requirement for maximum occupancy 8 -10 m2 per person as advised by BR part F. In my model, it seems to me that the required ventilation rate cannot be achieved by the use of trickle ventilators so I hope to hear from any one who have experience in this.
In MacroFLo, I assign Opening category= grille, opening area = 0.56%. Opening dimension: H=1.023m; W=0.886m and trickle ventilator size is of 40cm2. As the manufacture states that the equivalent area is of 27.6 cm2 so the value of equivalent area = 0.38 % of gross area (determined by: (27.6*10E-4)/(1.023 * 0.886)80%, with the glazing area is of 80% window area). This made up the coefficient of discharge = 0.43.
With such profile, when I test macro external vent, the air exchange rate only half of what is required (i.e. 6l/s compared to 13 l/s for one bedroom dwelling house).
I'm looking forward to any feedback soon.
Many thanks
To provide the background ventilation, trickle ventilator of 4cm2 opening area per m2 floor area to satisfy fresh air requirement for maximum occupancy 8 -10 m2 per person as advised by BR part F. In my model, it seems to me that the required ventilation rate cannot be achieved by the use of trickle ventilators so I hope to hear from any one who have experience in this.
In MacroFLo, I assign Opening category= grille, opening area = 0.56%. Opening dimension: H=1.023m; W=0.886m and trickle ventilator size is of 40cm2. As the manufacture states that the equivalent area is of 27.6 cm2 so the value of equivalent area = 0.38 % of gross area (determined by: (27.6*10E-4)/(1.023 * 0.886)80%, with the glazing area is of 80% window area). This made up the coefficient of discharge = 0.43.
With such profile, when I test macro external vent, the air exchange rate only half of what is required (i.e. 6l/s compared to 13 l/s for one bedroom dwelling house).
I'm looking forward to any feedback soon.
Many thanks