1. Bursting the Bubble
on Sealed Indoor
Environments
Steve Bertasso, CGP, MBA
TrueNorth Development
Middle Tennessee State University

2. Support our
Future
Donate to NAHB Student
Chapters to support the
Leaders of Tomorrow
Visit http://www.nationalhousingendowment.org and
follow “Donate Now”

3. NAHB Student
Chapters
Learn all that is happening
with Students of Construction
at: https://www.facebook.com/
NAHBstudentchapters

4. 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...

5. Tight House - Truth
• Pressurized
• Allergens
• Toxins

6. Air Infiltration- Truth
• Air Sources
• Energy Impact
• Consumer Comfort

7. 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

8. Indoor Air Quality
Truth 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.

9. Air Infiltration
Defined as...
" pass into or through by
filtering or permeating”

10. Testing Methods
• Blower Door Test
• Air Changes per
Hour ACH
• Duct Blaster Test
• % leakage

13. Results
&
Considerations

16. Questions
Steve Bertasso
sbertasso@truen.com
615-594-2575
TrueNorth Development
Middle Tennessee State University