Bursting the Bubble on Sealed Indoor

EnvironmentsSteve Bertasso, CGP, MBA TrueNorth Development

Middle Tennessee State University

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Indoor Air Quality

Myth 1 - You can seal a home too tight.

Myth 2 - Air infiltration is detrimental to healthy indoor environments.

First, the truth...

Tight House - Truth

• Pressurized

• Allergens

• Toxins

Air Infiltration- Truth

• Air Sources

• Energy Impact

• Consumer Comfort

Indoor Air Quality

Myth 1 - You can seal a home too tight.

Myth 2 - Air infiltration is detrimental to healthy indoor environments.

Let's re-state these

Indoor Air QualityTruth 1 - You can seal a home too tight,

if you do not include proper ventilation.

Truth 2 - Air infiltration is detrimental to healthy indoor environments, if it is

not controlled and intentional.

Air Infiltration

Defined as...

" pass into or through by filtering or permeating”

Testing Methods

• Blower Door Test

• Air Changes per Hour ACH

• Duct Blaster Test

• % leakage

Results &

Considerations

Questions

Steve Bertasso sbertasso@truen.com

615-594-2575 TrueNorth Development

Middle Tennessee State University