# Blower Door Depressurization and the Human Ear

Has anyone ever heard of blower door depressurization effecting infants ears?  Is there a place where one could find out more about the subject?  Met a respectable individual that would not perform door testing with homes that have infants present.  Seems like something that could be of concern.  Thanks in advance for your thoughts and info.

Views: 101

### Replies to This Discussion

Here is a chart I did showing the pressures:

 Unit to pascal 25 Pa 50 Pa 75 Pa 1 atmosphere = 101,325 Pa 0.000 247 0.000 49 0.000 74 1 bar = 100,000 Pa 0.000 25 0.000 50 0.000 75 1 PSI = 6,894.76 Pa 0.003 63 0.007 25 0.0108 1 in Hg = 3,386 Pa 0.007 0.015 0.022 1 in H2O = 249 Pa 0.10 0.20 0.30 1 mm Hg = 133 Pa 0.19 0.38 0.56 1 millibar = 100 Pa 0.25 0.50 0.75 1 PSF = 47.88 Pa 0.52 1.05 1.56

That is not enough to affect a baby (nor break window seals, etc...) but with that said I also would not want to do a blower door test with an infant or very small child in the house as one is not sure what containiments one might be pulling in, nor how healthy that infant is.

I agree with Sean about "the other contaminants" and in general, whether they understand how slight 50pa is or not, that doesn't stop them from telling everyone you did bad.

But, here is another example of how small 50 pa really is.  When you drive to a higher elevation, you can feel your ears pop.  A change in elevation is understood to be associated with a change in pressure.  Walk from a basement to the second floor and you will experience about 50 pa decrease in pressure.  Walk back to the basement and it increases by the same.

Our manometers cannot see this shift in atmospheric pressure, their design does not allow it, but that is another thread.  But explaining to a home owner that the 50 pa is about the same as top to bottom of a 2-story house might help.

Atmospheric pressure near sea level decreases about 3.5 pa per foot you go up.

Bud

Nice point Bud & I might have to actually add that to the article assuming you don't mind

Not at all.

Bud

## Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy, under the American Recovery and Reinvestment Act) and brought to you in partnership with Home Energy magazine.

## Latest Activity

yangxiaohua posted a blog post

### Buy LED panel light, please difference LED light panels and diffuser

With the development of the LED lamps and…See More
7 hours ago

### John Abdo just added their location.(via Member Map)

8 hours ago
Nick Helmholdt replied to Joshua Knittel's discussion Google Thermal View? in the group INFRARED THERMOGRAPHY USERS
"Any bets on how long it will take this company to land in court? A local energy efficiency group in…"
14 hours ago
Matthew Redmond posted a photo

### 62.2 photo

15 hours ago
Matthew Redmond posted a status
"Full house for NYSWDA's ASHRAE 62.2 course today. A lot of discussion on implementing this standard on NY State's diverse housing stock."
15 hours ago
Paul Scheckel posted a blog post

### Less oil, more courage: Energy and Art

Hard to admit, but I'm not all fun-facts all the time. Sometimes I even pay attention to things…See More
16 hours ago
Tom Delconte posted a blog post

### The Surroundings Are Comprised of (fill in the blank) !

In Building Science…See More
18 hours ago
Barbara Hall and Adam brown joined Home Energy Pros
21 hours ago
"Pat, I think you and I agree on a LOT of things.   One thing I don't want to see is more…"
yesterday
"Bob B.   Buying a home is a good investment because it is forced savings more than a good…"
yesterday
Joe Huang posted a discussion

### White Box Technologies launches Web-based weather data for building energy simulations

White Box Technologies is pleased to announce under agreement with ASHRAE the launch of WBT Weather…See More
yesterday
"My life changed when I got 'ductalatored' - became familiar with proper sizing guides for…"
yesterday

© 2013   Created by Lawrence Berkeley National Laboratory.