so if I understood correctly, they closed the system except the one port that has air blowing into it with the duct blaster. The amount of air flow required to reach the 25 Pa was 10 CFM? Which if I heard correctly the total system flow is 600 CFM, so 1.7% of total system flow?.. I dont know much about HVAC and researching it as a trade to enter an apprenticeship on. I appreciate these types of videos cause it let's me gauge my interest levels and ability to understand the discussions being naive about the topic. And if I heard the other guy correctly, the new code coming out in your area requires 4% or less total system flow to reach 25 Pa? And if that was correct then you'd need 24 CFM to be at 4% total system flow at 25 Pa.
Craig Baker it’s actually 4 CFM per 100 square feet. So I’m this scenario duct leakage would have to be under 66 CFM. (Ducts only need to be tested if they’re in unconditioned space in VA)
Hi Neil, I'm trying to find a good flex duct brand that you've had experience with. I know all flex is not created equal (I'm mostly concerned from a durability/airtightness standpoint). Thanks!
Angie - I like the Atco and Thermaflex brands the best of the ones available to me… Thermaflex also has some very durable options available, but they are significantly more expensive than “standard” flex.
!["สนธิ" ห่วงมีขบวนการปกป้อง "ทนายตั้ม" : [THE MESSAGE]](http://i.ytimg.com/vi/2GQNp3EoMc0/mqdefault.jpg)
Nice!!! 👍
Proving your work is above the standard!
Mike Cianfrocco thanks Mike!
Based on all the work I have seen you do on TH-cam, I am not surprised. Nice job.
Kenny W thanks, I appreciate the kind words!
Bad fuckin ass dude.
👍 Ring 4
so if I understood correctly, they closed the system except the one port that has air blowing into it with the duct blaster. The amount of air flow required to reach the 25 Pa was 10 CFM? Which if I heard correctly the total system flow is 600 CFM, so 1.7% of total system flow?.. I dont know much about HVAC and researching it as a trade to enter an apprenticeship on. I appreciate these types of videos cause it let's me gauge my interest levels and ability to understand the discussions being naive about the topic. And if I heard the other guy correctly, the new code coming out in your area requires 4% or less total system flow to reach 25 Pa? And if that was correct then you'd need 24 CFM to be at 4% total system flow at 25 Pa.
Craig Baker correct.
Craig Baker it’s actually 4 CFM per 100 square feet. So I’m this scenario duct leakage would have to be under 66 CFM. (Ducts only need to be tested if they’re in unconditioned space in VA)
@@neilcomparetto5282 so like if the ducts ran though an attic that isnt temperature or humidity controlled?
Craig Baker vented attic, vented crawl space, exterior walls are unconditioned. (FWIW we very rarely run ducts in unconditioned)
Hi Neil, I'm trying to find a good flex duct brand that you've had experience with. I know all flex is not created equal (I'm mostly concerned from a durability/airtightness standpoint). Thanks!
Angie - I like the Atco and Thermaflex brands the best of the ones available to me… Thermaflex also has some very durable options available, but they are significantly more expensive than “standard” flex.
Thanks for the prompt reply. I actually saw a bunch of thermaflex at Menards the other day