Negative Pressure

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• Ventilation

  Pressurize Your Home to Keep Contaminants Out

  When a house is pressurized, soil gases and contaminants from within building cavities are kept out of the living space.
• Ventilation

  Ventilation - Why Natural Isn't Enough

  Because Mother Nature is partially responsible for the air-exchange rate in all houses, it is important that we understand how she does her work.
• Home Ventilating Institute

  What Are Whole-House Fans, Whole-House Comfort Ventilators, Whole-House Ventilation Systems?

  These terms are used somewhat interchangeably, which is confusing. HVI shows how to tell them apart.