Hvac training, cfm, blower adjustment, air flow, Air Before Charge, manometer, blower chart

[@smokeysmith1282]

Hats off to the instructor for his awesome approach at passing along his knowledge and passion for doing it right. Cheers to all of the young HVAC guys jumping up in the saddle. It’s a very rewarding career with excellent pay. Wear your safety glasses and Ninja thin rubber gloves. They’re fantastic and ya won’t get refrigerant burns when disconnecting from the system. Cheers 🥂!

[@arpc0027]

Wow. Some people think a/c techs charge too much but they don’t realize all of the education, training and experience the techs go through which costs money. Nobody should work for free.

[@ljv2094]

Exactly! I work in the residential side of the industry I learned over time how powerful communication is, relaying our knowledge back to our customers into simple form is key to success. That was my biggest weakness causing many rejections towards my recommendations. Explain our value to our work the less rejection we will encounter :)

[@danielzertuche9893]

Hats off, to Mr. Reed, I commend you for your knowledge and your years of being in the trade. I was just stopping by looking at videos and I realize this was a ONE STOP video and now ! I working for STRADA Services in the HVAC dept. 3 months now ! i’m hoping that you’ll come back and give us some training it’s be GREAT !!! I hope you will come back….and give some more classes looking forward for your knowledge. Daniel Z

[@Almtyhalfbreed]

Perfect training video for green techs 👏🏽👏🏽

[@Livingcomfortinc]

What a lucky kid you are getting one on one training

[@tedallen9078]

i've been in the field 25 years. and i just watched real world charting in this video. kudoos to this fine instructor. i needed these numbers today as i was calibrating a 3 zone 3.5 ton system. the by-pass damper was installed incorrectly causing the heating cycle to interrupt due to a temperature over limit. i was called in to fix it. safety first.

[@vincentabarca]

Thank you for the amazing information Mr.Reed !

[@corruptedbrain6]

Thank you for sharing your knowledge with us !

[@TWeatherford88]

Excellent video and explanation. I really like your choice of concise, concrete terms (should, is etc).

[@zoogie980]

Thanks, this is how I assumed it was done but had to double check to make sure

[@pridemechanical815]

Good job with this video. You created a great learning resource my my newer techs. Thanks

[@gankstar2000]

Well done!!! Great teacher!!!! Jesus is Lord; God bless!!!

[@liantoby1200]

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[@dominickreginald5969]

@Lian Toby instablaster =)

[@liantoby1200]

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[@liantoby1200]

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[@dominickreginald5969]

@Lian Toby happy to help =)

[@joeydelmarsjr.646]

thank you for this video, you explained very well and gave a better understanding of static pressure im a HVAC enthusiast so im always looks for way to meet or exceed hvac performance with new and old systems.

[@chamasdad]

Thank you Thank you Thank you!

[@joeyduffy7732]

I can appreciate this video. Your supply static is inconclusive because of where the port is. Also I believe your supply plenum should be a minimum of 18” and you would get a better reading. Install the static port up high towards the back of the plenum. With it being in the front bottom corner you have about 8” of cabinet before the supply discharge.

[@chuckquinn8026]

Excellent easy to understand video!

[@canamericanguy7992]

Informative, thank you! Now that we know the how, it would be great if you could explain the why. In your scenario here, what are the implications of running the fan on high instead of medium? Are we able to calculate some sort of loss in efficiency? And when the static pressure has remained virtually the same, why wouldn't you want more air circulation?

[@thebaba9511]

Checking CFM over a dry coil, it makes no difference. But when the system is running it will affect your superheat and su cooling. A slow blower speed will cause your supply air to be too cold, cause condensation and buildup of all kinds of funk in your duct work.

[@thisisyourcaptainspeaking2259]

@@thebaba9511 Thanks! Although I'm still not entirely clear on the downside of a blower speed higher than target, would that be specifically, incorrect superheat/subcooling balance? Two (other) aspects I can think of are excess noise and incorrect condensate scavenging, where condensate might be blown off the evap coil onto other surfaces.

[@jfoley1968jf]

Great video!! thanks for the great information!!

[@aldocampi3575]

Awesome, explanation

[@lancerudy9934]

Very nice video

[@user-fb1kr2ye4y]

Hey, question, why do you use just the tube without the pito tube for checkin return static pressure? You can use the tube also right?

[@fisheye42]

I'm new to this stuff. The Supply was positive (+0.1) and Return was negative (-0.42 at 2:54 in the vid), so adding them on the sheet would result in -0.32, right?? (not 0.52). Or should you you intentionally ignore the + and minus signs?

[@evantrace2902]

Your calculating your total static. One side is going to be pulling air (negative static) and the other side pushes air (positive static). The negative is just telling you which side so it dosent apply when you add them.

[@fisheye42]

@@evantrace2902 Thanks. It’s making more sense now. TSP is total “work” (resistance) that the blower/system has to overcome. A push and a pull are still both “work,” so we add the two amounts. In other words, we ignore the pull’s minus-sign because pulling still ADDS to the workload).

[@hvacguy11]

Great video thanks

[@mrbubblesbooks]

May I ask what camera you’re using to record your videos?

[@HVACTailGateTrainer]

I believe this was simply a go pro5

[@nessnesu6202]

Why would you look at outdoor unit for tonnage for airflow? Thought it would be check indoor coil capacity/tonnage then adjust airflow. Most of the time I see indoor coil either same tonnage or slightly bigger than outdoor coil.

[@allenreed8130]

Air handlers can cover a variety of sized outdoor units sometimes. A air handler may for example be compatible for a 2 2.5 or 3 ton outdoor unit, just as an example" you must identify the tonnage of outdoor unit and give the evaporator 400 cfm per ton of the outdoor units capacity. Crap tons of units out there with incorrect air flow setups in the air handlers.

[@ArcheryRuleZ]

Ya, the more you check , the more bad installations you see

[@goodtimestxphotobooth985]

Question- I just had a new ac installed and the blower motor/return air section was making a weird throbbing or pulsing noise. Tech said that he had to reduce the fan speed. Does this sound correct? The noise did seem to go away but now it seems that the air supply is too slow/low and taking the house too long to cool down. Would you have any other ideas as to the strange sound? (Sounded almost as if you had an old box fan and put a piece of cardboard behind it rapidly on and off to restrict the air flow)

[@S-the-simple-engineer]

Usually that means that the supply side has a restriction somewhere which is blocking all that air that's getting pushed by the blower.

[@HVACTailGateTrainer]

I always start with a full job link report before I try thinking about problem scenarios. If your hvac company utilizes fieldpiece job link charge and air kit and the fieldpiece joblink manometers as for a copy of the report. IF they have and use this tool to generate performance reports, get a copy, take a pic , and post it for me to look at.

[@ivankrushensky]

We need more education like this in the US, and a lot less gender studies.........

[@justwork_hvac]

Thanks for sharing this great video

[@biblebloopers946]

Can you apply this method to an ecm motor?

[@HVACTailGateTrainer]

X13 yes, variable speed no.

[@RobertTuck-vo8cw]

That looks like a static probe, not a pitot probe.

[@kyleperry1701]

only question is where did you get the 1400ish cfm from how do you know the black is 1400 cfm.

[@kyleperry1701]

i understand air handlers come with a blower motor that can handle tons from 1 ton to 3 tons of air / and some can can do 3 tons to 5tons . question is how do you know that airflow without using a anemometer

[@ArcheryRuleZ]

He does show u how to read the fan capacity chart ......

[@jcstudios5629]

I’m sorry but I don’t think your static pressure readings are very accurate. First of all you just stuck the hose inside the return. Second, what type of probe was used on the supply side? Conventional wisdom says to use a 90 degree elbow probe with it facing with the airflow to get the most stable and accurate static pressure readings. The other problem is the air turbulence happening on the supply side. The rest of the demonstration is good.

[@come_on_now]

Static pressure bubba... before the vent/grille... that is why your supply reading was ALL OVER THE MAP. Enjoy the free education instructor.

[@ArcheryRuleZ]

Plus, on the return test shouldn’t they make sure the probe tip was pointing towards the air coming in

[@kevinpearce3281]

Terrible demonstration