Unless I have this wrong, the BPI CAZ depressurization limits and draft calculations are for gas boilers and furnaces.  Up here in New England we have a lot of oil burners.  It would seem that it would take a lot more negative pressure in a CAZ to get an oil burner to spill.  I have flue pressures for oil of: <10 F at -15 Pa, 11 - 40F at -13 Pa, 41 - 60F at -11 Pa, 61 - 90F at -9 Pa, and >90F at -7Pa.

Tags: Oil, burner, limits, pressure

Views: 336

Reply to This

Replies to This Discussion

Paul,
We see lots of fuel oil in the NC mountains where we have been training BPI for over 2.5 years now. After many discussions with several trainers i have come to the conclusion that the fuel oil burner should be classified the same as an induced fan furnace receiving a CAZ Depressurization limit of -15. However, High Retention Head Burners may allow this limit to go even lower. I would love an official BPI interpretation on this issue.
I have recently received a reply from Tony Peters QA for Affiliates for BPI who states that, "CAZ depressurization limits shall be identical for gas or oil fueled combustion appliances. An oil fueled combustion appliance shall not be classified as a mechanically assisted draft appliance. Please classify oil fueled combustion appliances as natural draft boilers or furnaces." He also says, "Draft calculations shall also be identical for oil or gas fueled combustion appliances. Please follow the acceptable draft test results chart found on page 10 of BA for all natural draft appliances."
Seems a bit odd to me, but he explains that, "if the oil fueled combustion appliance has been installed with a barometric damper connected to the vent pipe, it cannot support a -15Pa CAZ depressurization limit."

RSS

Featured Forum Discussions

Too many BTU's. Too much horsepower?

Started by Steve in General Forum. Last reply by Eric Kjelshus on Saturday. 4 Replies

Stack/wind pressure and flow networks.

Started by Daniel James Grundy in Training. Last reply by Daniel James Grundy on Thursday. 5 Replies

BDT with vermiculite in hollow CMU walls?

Started by Brad Cook in General Forum. Last reply by John Nicholas on Thursday. 2 Replies

Videos

  • Add Videos
  • View All

Latest Activity

Profile IconMatt Ward and Lucifer Prescott joined Home Energy Pros
1 hour ago
Kent Mitchell replied to Rob Madden's discussion Energy auditing as a stand-alone business model...
"Swiftsure Energy has run as consultants, verifiers and raters for 8 years- we audit very few (about…"
3 hours ago
Horace Douglas Hunt, Jr. commented on Home Energy Magazine's blog post The Elephant in the Room
"poignant and timely story!"
6 hours ago
Horace Douglas Hunt, Jr. liked Home Energy Magazine's blog post The Elephant in the Room
6 hours ago
Home Energy Magazine's blog post was featured

The Elephant in the Room

Last week I attended the annual Home Performance Coalition (HPC) Conference & Trade Show in…See More
13 hours ago
Home Energy Magazine posted a blog post

The Elephant in the Room

Last week I attended the annual Home Performance Coalition (HPC) Conference & Trade Show in…See More
22 hours ago
Diane Chojnowski replied to Quinn Korzeniecki's discussion Don MacOdrum Receives BPI's 2017 Tony Woods Award and Four Others Inducted in to Hall of Fame in the group Building Performance Institute (BPI)
"Congratulations Mike! Thanks for all you do for the home performance industry!"
yesterday
Sarah OConnell's blog post was featured
yesterday

Home Energy Pros

Welcome to Home Energy Pros – the unique digital community by and for those who work in the home energy performance arena.

Home Energy Pros was founded by the developers of Home Energy Saver Pro (supported by the U.S. Department of Energy) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network. Please honor our Guidelines

© 2017   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service