BPI Worst Case CAZ Depressurization Testing

An insider's review of setting up the Combustion Appliance Zone for worst case depressurization conditions, from the Building Performance Workshop. Complies with Building Performance Institute (BPI) and Residential Energy Services Network (RESNET) standards.

Comment

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

Comment by A. Tamasin Sterner on May 16, 2011 at 4:04pm
What we do is use a 100 ft hose that is attached to the manometer - end in the CAZ - so we can SEE what's happening in the CAZ all the time.
Comment by Corbett Lunsford on May 16, 2011 at 4:02pm
Good tip- though it can be impractical to always check what each door does, it would be a great learning experience.  You can be sure of reaching worst case more simply by starting at the furthest point from the CAZ, so you're always measuring the zonal pressure in the room WRT the CAZ (where you're standing, due to all the open doors behind you).
Comment by A. Tamasin Sterner on May 16, 2011 at 3:10pm
Nice work.  Suggestion:  What we REALLY want to know is what the air handler and door positions are doing to the CAZ.  So, what we do is monitor the pressure in the CAZ when operating fans and the air handler and door positions.  A person really doesn't know the maximum CAZ depressurization unless one is monitoring what is happening in the CAZ during the fan operation and door closures.

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

Tom White posted a video

Ducts in an Attic

http://www.drenergysaver.com | 1-888-225-6260 In episode 66 of the On the Job video series, Larry Janesky, owner and founder of Dr. Energy Saver, is back to ...
1 hour ago
Stacy Hunt posted events
5 hours ago
Rob Madden, Solar Home Broker posted blog posts
5 hours ago
Rob Madden, Solar Home Broker posted a photo
6 hours ago
Kerry Haglund posted a blog post

Efficient Windows Collaborative Releases Window Selection Tool Mobile App

The Efficient Windows Collaborative (EWC) has released a mobile app based on it web-based Window…See More
6 hours ago
Casey Gesell posted a video

Home Comfort Pays for Itself | Ideas Worth Sharing

http://www.myhomescience.com There are 88 million homes in the U.S. and Canada alone that burn twice as much fuel for heating and electricity for cooling tha...
10 hours ago
Profile IconRob Madden, Solar Home Broker, Alicia Hobbs, Rachel Scott and 2 more joined Home Energy Pros
11 hours ago
Don Fitchett posted a video

HVAC AC Compressors Training

This HVAC training sample is from the HVAC section of the Online Industrial Training Video Library (http://bin95.com/Industrial-Training-Videos/HVAC-Training...
11 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service