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Description
Wall Master Light Dep Exhaust FanUsing light deprivation to control plant growth and blooming is a trending strategy for short day plants, such as cannabis and poinsettias. Without proper ventilation during the light deprivation stage, heat, mold, and disease can quickly destroy your crop, setting you back a whole season. J&D's WM Light Dep Exhaust Fan is a crucial piece of your greenhouse light deprivation system for healthy, robust, and profitable blooms. Allows for bigger, higher
Using light deprivation to control plant growth and blooming is a trending strategy for short-day plants, such as cannabis and poinsettias. Without proper ventilation during the light deprivation stage, heat, mold, and disease can quickly destroy your crop, setting you back a whole season. J&D's WM Light Dep Exhaust Fan is a crucial piece of your greenhouse light deprivation system for healthy, robust, and profitable blooms.
- Allows for bigger, higher quality, larger profit flowers
- Full range of sizes, even ones for small greenhouses
- Test data is for fan with light trap, enabling dependable and accurate air exchange calculations
- Fan with light trap mounts flush to the interior of the building, freeing up valuable space and eliminating a protruding ledge
Specifications
Standard/Belt Drive Motor
| Model No. | Size | Phase | Speed | CFM @0.10" SP | CFM/Watt @0.10" SP | Drive | Prop |
|---|---|---|---|---|---|---|---|
| VF24DMLT1 | 24" | 1 | 1 | 4,267 | 10.6 | Direct | 3-Alm |
| VF24DMLT3 | 24" | 3 | 1 | 4,457 | 10.7 | Direct | 3-Alm |
| VF30DMLT1 | 30" | 1 | 1 | 5,216 | 11.0 | Direct | 3-Alm |
| VF30DMLT3 | 30" | 3 | 1 | 6,259 | 12.1 | Direct | 3-Alm |
| VF36GGLT1 | 36" | 1 | 1 | 10,948 | 9.4 | Belt | 4-Glv |
| VF36GGLT3 | 36" | 3 | 1 | 11,044 | 9.9 | Belt | 4-Glv |
| VF42GGLT1 | 42" | 1 | 1 | 13,064 | 10.4 | Belt | 3-Glv |
| VF42GGLT3 | 42" | 3 | 1 | 13,957 | 10.4 | Belt | 3-Glv |
| VF50GGLT1 | 50" | 1 | 1 | 19,717 | 10.5 | Belt | 3-Glv |
| VF50GGLT3 | 50" | 3 | 1 | 22,038 | 10.1 | Belt | 3-Glv |
Gold Star Motor
| Model No. | Size | Phase | Speed | CFM @0.10" SP | CFM/Watt @0.10" SP | Drive | Prop |
|---|---|---|---|---|---|---|---|
| VF24DMLT1-GS | 24" | 1 | 1 | 4,854 | 7.8 | Direct | 4-Ply |
| VF24DMLT3-GS | 24" | 3 | 1 | 4,252 | 9.0 | Direct | 3-Glv |
| VF30DMLT1-GS | 30" | 1 | 1 | 6,551 | 10.4 | Direct | 3-Alm |
| VF30DMLT3-GS | 30" | 3 | 1 | 6,645 | 10.0 | Direct | 3-Alm |
Technical Information
WM Light Dep Exhaust Fan Technical Specifications (PDF)
Additional Information
How do I size my fan and shutters system?
- The first thing that you need to determine is the amount of air required. This is stated in CFM (Cubic Feet of Air per Minute).
- Use the following formula to determine the CFM required for your greenhouse:
CFM = Length x Width x 12
Example: Greenhouse 12' wide and 24' long requires 3456 CFM (12 x 24 x 12) - Reference the above table. Select the appropriate combination of fan(s) to achieve the necessary CFM rating. Be sure to match the total CFM output for your exhaust fan(s) to the CFM ratings for your Inlet Shutters.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Sleek, upscale and supremely comfortable
Size: 9, Color: Cognac
I did not know that Marc Joseph makes hands free slip ins. I own four pair of Skechers, and I thought they were the only game in town. I decided that I wanted a pair of business casual pair of wingtips. I already own two pair of Skechers Mark Nason wingtips in blue and black nubuck, so I bought a pair of their cognac colored. Perfectly fine shoes, but when they arrived, I didn't like the color, so the search was on! I found these cognac-colored Mark Joseph's and hands down, they fit the bill for what I was looking for!
I actually bought two more pair of Skechers in the brown family in the same oxford, elastic lace style: One pair of another style of their Mark Nason line and one pair of their Garza line. So now I am comparing three pair of Skechers to the Marc Joseph's. Obsessive, I know :). Luckily, I have a Skechers store near me for easy returns.
The look I was going for is a sleek, business casual that I could dress up or down. Three things that I love about the Marc Joseph's are the beautiful cognac finish: the white yet lower profile soles and the more formal, narrower toe style.
The MJ's nailed it with the color. They have a slightly darker, more lustrous and glossier look than the others. The color alone looks classier and pairs well with black pants which I wear for work almost every day.
The white soles are exactly what I was looking for. The visible rise is probably about a third of the thickness of the others and are a much more subtle, classier look. They offset the cognac color nicely but are not that in your face, sneaker looking, thick white sole.
When I was comparing them to the others right out of the box, I thought they would be too narrow and tight because they looked sleeker and narrower than the others. But they fit perfectly and were very comfortable right out of the box. Upon closer inspection and comparison, I realized the narrower, sleeker look is because the eyelets for the elastic shoelaces are closer together that give the illusion that the shoe is narrower. They compensate for what might create a tighter fit across the top of your foot with two stretchy "gores" they are called on either side of the upper part. The "slits" are nicely finished, and you can't see the stretchy part and add a nice design touch to the shoe. But between them and the elastic shoelaces, they must stretch just enough to make them extremely comfortable across the top. So, if you have a high instep/arch, they should accommodate it nicely.
Last but not least, they are very comfortable shoes. I wear a size 8 1/2 to 9 and my foot is slightly on the wide side. I bought the size 9's and they fit perfectly. If you are between sizes or have wider feet, you may want to size up a half size. Because the Skechers have much thicker soles, they might be slightly more cushioned, but the MJ's are cushioned more than enough for my purposes and very comfortable. Plus, they actually just feel better on my feet. I can't speak to how durable they will be as I just got them, but so far, so good.
So, there you have it. I rely on other people's reviews a lot when buying online, and especially for shoes. I know it's always a crap shoot, particularly when buying shoes online, so I hope this review helps. Everybody's feet are different, but I highly recommend these.
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Reviewed in the United States on March 15, 2025
★★★★★ 5
Comfortable and look great!
Size: 10.5, Color: Cognac
Very comfortable, look nice, and slip on easily.
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Reviewed in the United States on June 4, 2026
★★★★★ 5
comfortable
Size: 10.5, Color: Cognac
comfortable and good looking
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Reviewed in the United States on June 9, 2026
★★★★★ 4
Checkpoint
Size: 10.5 Wide, Color: Navy Grainy Leather
Good shoes, comfortable.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Great fit!!!
Size: 14, Color: Navy Grainy Leather
Love them. Great fit. Thanks
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Reviewed in the United States on June 11, 2026