Basic CAZ instructions may not provide the correct number.

When you measure the worst case depressurization of a CAZ are you measuring the pressure in the appliance room or the room above it?  When your appliance room is in the basement and you run your reference tube upstairs and out the front door, your reading is actually for the room above at the same elevation as the point where your reference tube exits the envelope.  On a cold day, that can change your reading by a couple of Pascals.  And that can be the difference between passing and failing for some appliances.

We all know that the stack effect pressures vary from ceiling to the basement floor and they change with every foot of elevation.  So, how do we measure the pressure in a basement surrounded by dirt and no way to place our reference tube out through a concrete wall?  We calculate the change per foot for the given temperature difference and adjust our reading to the elevation we need.

Anyone doing this?  Anyone  interested?

Bud

Tags: CAZ, reference, tube

Views: 87

Reply to This

Home Energy Pros

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

Latest Activity

Susan E. Buchan posted events
3 minutes ago
Susan E. Buchan commented on Shawna Henderson's blog post Drainwater Heat Recovery Units & Water Efficiency
"Good points all, Shawna, Whenever I see these (installed) there is not surrounding insulation....is…"
18 minutes ago
Shashank Kirloskar posted a blog post

Top 6 Global PV panel manufacturers

As solar energy industry continues to grow, it is high time we familiarize ourselves with the top,…See More
3 hours ago
Al Tibbs posted photos
6 hours ago
Al Tibbs shared Lester Shen's blog post on Facebook
6 hours ago
Hannah Finch posted a blog post
14 hours ago
Hannah Finch updated an event
Thumbnail

RaterFest! 2015 - Mark LaLiberte Keynote at Estes Park

September 18, 2015 at 3pm to September 20, 2015 at 3pm
RaterFest! is EnergyLogic’s  incredible two and a half day training conference nestled amongst the…See More
14 hours ago
Kerry posted videos
15 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service