Natural and Mechnaical Ventilation (Leaving Cert Construction Studies): Flashcards
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Practise the cards
10 cards from this deck
What are the two main ventilation approaches?
What are the two main ventilation approaches?
Natural ventilation and mechanical ventilation
What does natural ventilation rely on?
What does natural ventilation rely on?
Weather conditions outside the building
Over-ventilation effects
Over-ventilation effects
Excessive warm air escapes, creates draughts
Under-ventilation effects
Under-ventilation effects
Mould growth, condensation, poor air quality
What is purge ventilation?
What is purge ventilation?
Rapid air exchange through open windows or doors
Where extract fans are used
Where extract fans are used
Wet or very humid areas (bathrooms, kitchens)
What does ACH stand for?
What does ACH stand for?
Air Changes per Hour - measures air replacement rate
Effective ACH rate for condensation control
Effective ACH rate for condensation control
0.5 to 1.5 ACH
What does MVHR stand for?
What does MVHR stand for?
Mechanical Ventilation with Heat Recovery
Where MVHR control unit is installed
Where MVHR control unit is installed
In the building's attic space