HVLS Fan

[FL Guy]

I am looking for some input from you number gurus
I am considering purchasing this fan, but I am torn between two models, 7’ & 10’.
My garage is 900 sf with a ceiling peak of 13.5’.
Thoughts on if the extra $400 is worth the difference in the specs below between the two fans?

If my calculations are correct, I came up with these numbers…
Fan Speed
7’- 37.5 mph
10’- 42 mph

Wind Speed
7’- 11.9 mph
10’- 13.6 mph
I am looking for a nice breeze that I can feel no matter where I stand in the garage.

SD10 - Super Duty Industrial Fans

This efficient 10’ fan moves more air with 3 blades than other fans with 5 blades, thanks to the innovative blade design and high-torque 400 watt motor. The included VFD uses standard 110V input and provides speed and direction control, as well as converting the voltage to 220V 3 phase to the...

superdutyfans.com

 

[jack stand]

Are 2 smaller fans out of the question?

 

[FL Guy]

Are 2 smaller fans out of the question?

I would prefer to stick with one fan.

 

[bdbecker]

I think you'll be just fine with the 7' fan.

When sizing HVLS (high volume low speed) fans, CFM is the number that you should focus on, not air speed. A little desk fan can blow air really fast, but it's not going to do much to cool you off because doesn't move the same volume of air as a larger fan.

Assuming your shop has 13' ceilings throughout (I know you said the peak 13.5', but the math is easier to just assume its flat), that means you have 11,700 cubic feet of air in your shop. The CFM rating on the 7' fan is 31,000. That means you'd be circulating the entire volume of air in your shop every 23 seconds. The fact that your roof slopes probably drops that time down closer to 20 seconds or less. I can't imagine needing to bump up to the 47,000 CFM that the 10' fan offers.

...I am looking for a nice breeze that I can feel no matter where I stand in the garage.

A clear path for the air to flow is likely going to have a bigger impact than the size of the fan. We've got dozens of HVLS fans deployed throughout our facilities. In areas where the floor is more open, they work great. In areas where there are a lot of monuments (machines, offices, racking, etc.) we use directional fans similar to this to achieve air flow.

Ceiling Fans - Super Duty Industrial Fans

Super Duty Industrial Fans are durable, affordable AND they move big air. Our industrial fans are the smarter solution for your cooling needs.

superdutyfans.com

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Unrelated, I appreciate that company's sense of humor. Found this on the FAQ page...

We are currently patent pending on 30 different claims on our HVLS fans. Our patent attorney just bought a new Rolls Royce in Super Duty Red with a starlight headliner and those funky wheel centercaps that don’t spin. We might have paid for it. He does send us a nice Christmas card with a $10 gift card for Applebee’s.

 

[FL Guy]

I think you'll be just fine with the 7' fan.

When sizing HVLS (high volume low speed) fans, CFM is the number that you should focus on, not air speed. A little desk fan can blow air really fast, but it's not going to do much to cool you off because doesn't move the same volume of air as a larger fan.

I understand what you’re saying. I have a couple of 18 inch wall-mounted fans in the garage. They are rated at 6500 CFM but like you state they’re only pushing air in a small funnel and you’re not going to feel anything 10’ off to the side.

Assuming your shop has 13' ceilings throughout (I know you said the peak 13.5', but the math is easier to just assume its flat), that means you have 11,700 cubic feet of air in your shop. The CFM rating on the 7' fan is 31,000. That means you'd be circulating the entire volume of air in your shop every 23 seconds. The fact that your roof slopes probably drops that time down closer to 20 seconds or less. I can't imagine needing to bump up to the 47,000 CFM that the 10' fan offers.

I have 12’ walls in the main shop and the “lean to” goes from 12’ wall to 9’.

A clear path for the air to flow is likely going to have a bigger impact than the size of the fan. We've got dozens of HVLS fans deployed throughout our facilities. In areas where the floor is more open, they work great. In areas where there are a lot of monuments (machines, offices, racking, etc.) we use directional fans similar to this to achieve air flow.

The shop is wide open. Only big thing in there is a trailer. Everything else is pushed against the walls on shelves.

Ceiling Fans - Super Duty Industrial Fans

Super Duty Industrial Fans are durable, affordable AND they move big air. Our industrial fans are the smarter solution for your cooling needs.

superdutyfans.com

-----

Unrelated, I appreciate that company's sense of humor. Found this on the FAQ page...

I noticed the sense of humor also in the FAQ page. Not sure what to think about it lol.

Here’s a link for the 10’ HO fan. My fan has 3 blades, the HO fan has 6. 3 on top of motor and 3 below the motor.

Below are pics of my garage.

 

[bdbecker]

I think you've got a good plan.

 

[nadogail]

May you be blown away by your fan, either by the High or the Lower speed model.

 

[FL Guy]

May you be blown away by your fan, either by the High or the Lower speed model.

Do you have one of their fans ?

 

[nadogail]

Do you have one of their fans ?

No.

 

[Steve W.]

After looking at your pictures, I will offer a suggestion: do not put a spinning blade under any of the lights.

Depending on the exact light output, you will at least see constantly-moving shadows, possibly even a strobing effect.

If your lights were more like strips or panels, it would not be so bad. Your spots are too precise.

I can assure you that it is VERY distracting.

.

 

[FL Guy]

After looking at your pictures, I will offer a suggestion: do not put a spinning blade under any of the lights.

Depending on the exact light output, you will at least see constantly-moving shadows, possibly even a strobing effect.

If your lights were more like strips or panels, it would not be so bad. Your spots are too precise.

I can assure you that it is VERY distracting.

.

The lights are spaced about 12’ apart. The fan is 7’. I’m “hoping” I do t have that effect. I have read about it before.

 

[FL Guy]

Found these pics online.. the blade he’s holding is for their 10’ fan. I can’t believe how wide it is!