Ventilation Flashcards
Ventilation
Stale air removal
Replacing fresh air ,harmful contaminates
Mechanical and natural
Natural
By passive forces like wind speed or pressure difference
Relies on wind and temp
Single ventilation
1 opening by windows or vents
Cross ventilation
For narrow but deep building
Windows or vents on both sides of the wall
Building where diff pressure draws air in and out
Stack
For taller with atrium and deep building
Cool at lower level
Hot air at higher level though atrium windows
Mechanical ventilation
Where natural ventilation is not possible
Balanced ventilation
Balanced ventilation systems have two fans and two air filters. The two fans push air into and out of the building. The air filters keep the heat and moisture recovery units from accumulating dirt. Most balanced systems employ heat recovery ventilators (HRVs) or energy recovery ventilators (ERVs).
Exhaust air throws, air, pollutant and moist places
Exhaust air vent
Exhaust fan
Supply fan
Fresh air inlet
Air exhaust
Exhaust ventilation
Exhaust ventilation systems work by depressurizing your home. The system exhausts air from the house while make-up air infiltrates through leaks in the building shell and through intentional, passive vents. Exhaust ventilation systems are most appropriate for cold climates.
Supply ventilation
Supply ventilation systems allow better control of the air that enters the house than exhaust ventilation systems do. By pressurizing the house, supply ventilation systems minimize outdoor pollutants in the living space and prevent backdrafting of combustion gases from fireplaces and appliances.
By pressurising the building
Fans let’s outside air into room
Gives better control of air
Exhaust air supply
Fans
Smoke ventilation
Used up to draw smok layer when fire is in the building
Désenfusage
Direction indicator
Déclencheur local
Air nerf
Ventilaser
