Archive for 'Ventilation'

Whole House Ventilation and Title 24

Whole House Ventilation and Title 24

Posted on 17. Nov, 2009 by Rebecca Firestone.

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After January 1, 2010, all new homes in CA must include whole-house ventilation systems. Yes… we’ve made building envelopes so efficient, that now we have to in essence introduce highly controlled leakage. There are two mandatory ventilation features in the new Title 24: 

  • Intermittent exhaust fans for moisture control in all kitchens and bathrooms
  • Whole-house continuous mechanical ventilation for indoor air quality (IAQ)

A good ventilation system will filter out indoor air pollutants (VOCs like formaldehyde from particleboard or acetone nail polish remover) as well as filtering outdoor air on the intake side; however, not all whole-house ventilation systems include outdoor air filtering. Here’s a summary of the ventilation course module from last week’s Title 24 update class. 

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