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How To Run A Blower Door Test
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- Опубликовано: 17 авг 2024
- In this video, we walk through the details of how to run a blower door test and what's involved with air tightness testing. Follow along with Sam Myers of Retrotec as he prepares a home for testing, sets up the equipment, conducts a manual test, and conducts an automated test with rCloud.
Air tightness testing of building enclosures is gaining momentum within multiple trades in the building and HVAC industries. It is a key component for delivering a comfortable, healthy and efficient home.
Intro: (0:00)
Who Uses a Blower Door? (0:29)
What Problems Does It Solve? (1:30)
Blower Door Parts (1:49)
Preparing the House (2:03)
Setting Up the Equipment (5:40)
Using the Gauge: (16:42)
Run a Blower Door Test (20:04)
Determining the Correct Range (23:07)
Automated Testing with rCloud (25:43)
Learn More or Contact Retrotec (36:36)
Very interesting, gonna have to check out more of these
Thanks Sam for the video. That was a very comprehensive video.
Great content! Super helpful to watch before unboxing your RetroTec blower door!
Great video. Love the info. Thanks Sam
We're glad it was helpful to you!
Excellent video!! Thanks for providing us with a current presentation.
Glad you liked it!
Thank you!
How can we ensure that a particular range can obtain a certain fan pressure range in case of novec enclosure test. For example, test is conducting by using the ranges B74 and B1, DM 32 showing the fan pressure 210pa and 255pa at 50 pa and -50 pa respectively for B1 range. Is there any certain fan pressure range for each ring at 10 and 50 pa?
Great video. How precise does volume measurement have to be on an existing home? Can you take sqft and average ceiling height? I find volume measurements difficult on high end homes with any lie prints
As close as you can get. We find that using a laser distance measurer is the easiest and most accurate way to take measurments in the field. It works great for vaulted ceilings and encapsulated attics. And when you are measuring parimeter on the outside of the building, you can wedge a piece of carboard between the siding and gutter to make a target to shoot with the laser.
Thank you.
Do you need to test at two different doors to ensure the door used first has an acceptable seal?
its usually not needed, but indeed you can. As long as the door has weather stripping and has the rough opening sealed to the assembly, door seals make up a miniscule amount of leakage for traditional code-built homes. The blower door frame and cloth has a similar leakage profile of the typical exterior door assembly. In most houses, the bulk of your leakage will be found in other parts of the building envelope such as top plate to ceiling connections, open knee walls, MEP penetrations, tray ceilings, cantilevered floors, open chases, etc.
Question: If the auto cable is connected, once the fan is on it will directly speed up to 200+ pa, what did I do wrong? I can only manually control the fan speed. Thanks very much for your help
make sure the cable is plugged in at the top of the gauge and into the "in" port on the fan. Plug the cable in before you set pressure on the gauge
I have a question. I had a company come do a test on my house today and they ran the whole test at 35 pascals. Is that an issue? They said my score was 3000 cfm but I'm guessing if they ran it at 50 pascal it would've been significantly higher correct?
It could be a couple of things. They may have just extrapolated the reading to provide what the flow would have been if it were to reach 50Pa. Our manometers provide the ability to do that. However, our fans generate much more than 3000 cfm, so they should have been able to reach 50. Its also possible that they werent trained properly, as a flow at 35 Pa that isnt extrapolated does not provide a meaningful result in most circumstances.
Thanks for the video! One question - you are not sealing the blowdoor frame to door's frame? In our country ACH should be less than 0.6 so every hole makes big difference in small volume houses :)
0.6 ACH50 is the leakage requirement for Passive House. We dont seal the door to the frame as that goes against most testing standards. Exterior doors leak, and our frame leaks slightly, but not as much as the typical residential door assembly. For tight targets like Passive House, many testers choose to use our mini frame in a window with our Model 300x fan. This way, you account for leakage in the door assemblies and use have less leakage area in the window compared to a door. The 300x fan is much smaller, but typically has plenty of flow for dwellings built to Passive House standards.
@@RetrotecEnergy thanks! You know, we have different types of windows and doors frame designs and without additional sealing there would be unnecessary leaking, so every country has different requirements. All at all, it is usefull and interesting information that you are sharing 😉
Very helpful video with exception the audio echo makes it hard to follow.
Thanks for the feedback! We're continuing to explore new A/V equipment and software. We'll have new training content with better quality up soon.
Is this effective only in colder weather? Or can it be done all year round.
This can be done year round. There are some corrections to be made in more extreme temperatures, however if you use the rCloud app, those corrections are automatically done for you.
@@RetrotecEnergy thank you for the reply!
Hi.. at 17 minutes you advise to have A is pascals and b in ach or cfm.. why do you not set b is pa as well? Tnx Richard
Since Ch. B is measuring the fan pressure, that reading in Pa doesnt tell you much about air leakage. When you set it to CFM, you get the air leakage automatically calculated for you at 50Pa of building pressure (CFM50). And if you need to report it in ACH50 for code, all you have to do is select that option and enter the volume of the building into the gauge.
@@RetrotecEnergy I am doing 8 point average at 5 point differences dropping down from 50 Pa.. I think the result in B channel is to be in Pa..
Tnx
@@richardjoseph7590 totally different if you are doing a multi-point test. You're best option is to use our rCloud app for that, or if you want to customize the pressure targets you want to take, you can do so by using our FanTestic software. In this case, it doesnt matter what Ch. B is set to since the software will handle the calculations and conversions for you. We recommend using some type of software designed to run multi-point tests as doing them manually can leave too many opportunities for error.
@@RetrotecEnergy Hi.. do you have a video in your library on using the software you recomm to get the multi point test done? I have loaded the Fantestic software you mention. Thanks
@@richardjoseph7590 this one probably needs to be updated, but this video shows you how to run a multipoint test in FanTestic: ruclips.net/video/sEetHCS_IiE/видео.html
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We need a 2.0 test option, just sayin! 😜