The L-shaped probe grew legs, so this was improvised with a straight metal tube. There seems to be a persistent notion that angling the probe toward the appliance (into the exhaust stream) is the correct technique, but wouldn't this result in interference from ram air pressure of the rising flue gases?

Tags: CAS, CAZ, analysis, combustion, draft, pitot, safety, spillage, tube

Views: 595

Reply to This

Replies to This Discussion

Ted, I see your point now. Thanks for clarifying. The CAZ pressure was recorded independly of the draft. I haven't seen anyone measure both results simultaneously on one manometer, but that is a really good way to illustrate the interaction between the two forces.
... and one of the things that makes dg700 such a cool tool.



  • Add Videos
  • View All


Latest Activity

Benny hani replied to Benny hani's discussion Manual J online
"Thanks Bob"
13 hours ago
Benny hani replied to Benny hani's discussion Manual J online
"Thank you Isaac"
13 hours ago
Bob Blanchette commented on Amber Vignieri's blog post Even with Polar Vortex, Hourly Pricing Participants Saved
"Looks like the days of paying a fixed amount per KWh are rapidly coming to an end. Many utilities…"
14 hours ago
Bob Blanchette replied to Benny hani's discussion Manual J online
"Be sure the size that you ACCURATELY calculate actually gets installed. Often…"
15 hours ago
Bob Blanchette replied to Sean Lintow Sr's discussion Water Saver or Gimmick? in the group Best Practices (Residential)
"The problem is these devices NEVER pay for themselves. Water is cheap, about $3 per 1,000 gallons…"
15 hours ago
Bud Poll replied to Rob Madden's discussion Blower Door Testing on Energy Star v3 home
"Where was the blower set up, front door, other?  Was if located in an unobstructed area, not a…"
David N. Armington liked John Poole's discussion Two Part Epoxy and Repair of Structural Wood
David N. Armington joined John Poole's group

Historic Home

Historic and vintage homes are significant to our cultural heritage, yet often lack energy…See More

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service