HVAC Service Call: 4 Downblast Centrifugal Exhaust Fans/Ventilators Not Working On The Roof

HVAC Service Call: 4 Downblast Exhaust Fans Not Working ( 4 Emergency Service Calls In 1 Video) Centrifugal Direct Drive Exhaust Fans Located On The Roof.
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Downblast exhaust fans, also called downblast roof ventilators, are designed to provide continuous exhaust of stale indoor air. They are often used to help ventilate restaurants, offices, schools, manufacturing and warehouse buildings.
Downblast fans are not for use with commercial cooking ventilation systems that exhaust smoke and grease. If you need an exhaust fan for grease applications such as for use with a commercial kitchen, you’ll need an upblast exhaust fan instead.
Belt driven fan motors are not directly connected to the fan’s blades. The fan blades of a direct drive downblast ventilator are attached directly to the shaft of the motor. They have fewer moving parts and are very energy efficient, requiring minimal maintenance.
If you are looking for a downblast exhaust fan for your restaurant or commercial building, it is important to select the one that is right for your facility. Choosing the wrong type or size exhaust fan can result in problems with efficiency, safety, and comfort.
Select from our wide variety of options for downblast exhaust fans. We carry many sizes of direct drive and belt drive downblast roof ventilators with capacities ranging from 300 CFM to 13,000 CFM. They are all AMCA Certified and made in the United States.
The durable and weather resistant, rust-free aluminum construction ensures years of uninterrupted continuous use with high efficiency and quiet operation. While they are typically roof mounted, any of our direct drive exhaust fans and any belt drive downblast fan with wheels of 24" or less may be wall mounted.

[@alexibonnet2634]

Too many issues/ problems with EX. Fans new replacement be best

[@gearmelugin3424]

the blower fan wheel should had a bottom ring that spins with the fan blades

[@carlosvaldez4823]

? Should you of stuck your hand with 3rd on you tested . The one with the screws that were stripped ? What if it would of came on while you where manually spinning it?

[@izzybell11]

Great tutorial and video. As always excellent job JMT. ⭐️⭐️⭐️⭐️⭐️

[@skatetocreate7]

Please do not stop making videos. You saved my ass today. This video was so clutch. Very through explanations for every step. Thank you bro

[@alexibonnet2634]

Good video due to the condition of the bolts being rusted fan blades, motor and wheel condition recommend replacing whole assembly to the customer it be a lot quick and faster

[@tonyyglesias7784]

First thing I thought, if it needs a motor & fan blade, install new unit. And give them a price for replacing all the units.

[@TheColinputer]

My feeling is. The fatter motors are the originals and the skinny ones are replacements ( i say this because you can see the 4 wider holes in the top plates.) Also i bet those skinnier motors were only designed to be used horizontal. Not vertical like they were. So the bearings didnt last long

[@peterking1134]

Cheap exhaust fans.

[@alexeytech1495]

Nice video.

[@charlesyii8963]

does the vent supposed to stay close? mine downblast fan blower is not strong airflow, thinking the vent might stuck close .. any thought ?

[@alanr585]

The neighbours would have been pleased when the electrician turned those noisy fans off.

[@hkhsm359]

Nice video Thanks for sharing

[@charlesyii8963]

do you have video that change the motor of this kind of fans? your video rocks!

[@sherwinalvarez7365]

Great vid. Whats the link to that bit.

[@MarioDallaRiva]

I bought this kit, super useful: www.leevalley.com/en-us/shop/tools/power-tool-accessories/44490-socket-adapters-for-hand-drills?item=99W6901

[@sherwinalvarez7365]

Oh i thought it was one bit that does all 3. I got those. But thanx for responding.

[@cravenmorehead1552]

How many did you replace

[@kencrane6420]

Dude! You have all these metal broken fan blades and you're using Knipex snips to discharge the potential across a capacitor?!? Haha, hindsight is 20/20. Keep up the good work man.

[@jdrs4214]

Wow!!! Even the road salt makes its way up on a commercial rooftop!!! Those nuts were seized on those ‘shroom extractor fans.

[@JVasselTeacher]

what supply store did you go to for the replacements?

[@luckizt]

keep em coming

[@JumpermanTech]

Will do! Stay tuned for new videos every week 🔧⚡

[@rogeriosoares8681]

Good

[@JumpermanTech]

You're welcome! Stay tuned for new videos every week 🔧⚡

[@Rinebo]

Very helpful!!!!!