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Description
18 in. x 9 in. Silver Galvanized Steel Crawl Space Fan VentThe Tjernlund UnderAire Series V2D Crawl Space Ventilator fan is designed to circulate fresh outdoor air underneath homesand porches. Excessive humidity levels in Crawl Spaces is the leading cause of premature rotting of support columns,joists, floors and beam supports. Humidity can promote fungus growth and increased termite activity. Humidity may alsocause plumbing failures due to rust and corrosion. Constant operation helps vent radon gases,
The Tjernlund UnderAire Series V2D Crawl Space Ventilator fan is designed to circulate fresh outdoor air underneath homesand porches. Excessive humidity levels in Crawl Spaces is the leading cause of premature rotting of support columns,joists, floors and beam supports. Humidity can promote fungus growth and increased termite activity. Humidity may alsocause plumbing failures due to rust and corrosion. Constant operation helps vent radon gases, treated wood off-gassingand other odors that might migrate into living areas. The V2D is controlled by a dehumidistat whichactuates the fan if the relative humidity rises above the selected set-point.- Fan powered crawl space ventilation quickly reduces moisture helping to protect both home and occupants
- Ventilates excess moisture, the cause of mold, mildew and wood rot. Increases air circulation to fight condensation
- Constant operation helps vent radon, treated wood off-gassing and odors that might otherwise migrate into living areas
- Increases air circulation to fight condensation. 220 CFM
- V2D is equipped with a factory installed and pre-wired thermostat which will prevent operationof the fan below 35°F outdoor temperature; normal operation of the fan will resume once the temperature outside risesnear 50°F
- Each fan is 25-Watts, inexpensive to operate
- 2-fans to maximize airflow
- 2-fans and large face plate sized forventilation openings through block foundations
- Includes thermostat, dehumidistat,pre-wired 6 power cord and hardware packet
- Turns on and off automatically to minimize power usage
Features
| Item Weight | 7 |
| Shape | Rectangular |
| Color Family | Silver |
| Product Weight (lb.) | 6 |
| Intake/Exhaust | Exhaust |
| Automatic/Manual | Manual |
| Color/Finish | Metal |
| Power Type | Electric Powered |
| Returnable | 180-Day |
| Features | Built-in Screen,Built-in Thermostat,Thermostat Controlled,Wildlife Guard |
| Material | Galvanized Steel |
| Mounting Position | Wall Mount |
| Rough Opening Height (In.) | 6 in |
| Product Height (in.) | 18 |
| Net-Free Area (Sq. In.) | 1 |
| Rough Opening Width (In.) | 10 in |
| Product Depth (in.) | 14 |
| Product Width (in.) | 8 in |
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
4.7 ★★★★★
Based on 1653 reviews
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Product Reviews
★★★★★ 5
Great wiring harness for light installations.
Size: 16AWG Wiring Harness-2 Leads, Size: 16AWG Wiring Harness-2 Leads
This is a great wiring harness for LED lights. These come in one or two leads application. All that means is that they come ready for one or two lights, depending on your installation. The plug in connectors for each light comes with the set so that is a plus. I’ve attached a picture of the plug/connector for the lights so you can take a look at them. Although the relay is an “overkill” for low wattage LEDs, it’s OK to have it just in case you decide to change your lights for larger ones or halogens, in the future. In my case I will be using this harness in my motorcycle. It is very long for my need, which is great for cars, but too long for motorcycles since you have to remember that room/space is scarce in motorcycles. I ended up cutting the wires to my desired length and using heat shrink butt connectors and “glued” heat shrink covers for waterproofing the connection points. All in all these are great quality and I am very happy with them.
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Reviewed in the United States on December 16, 2020
★★★★★ 5
Nice
Size: 16AWG Wiring Harness-2 Leads
Worked great, easy to install
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Reviewed in the United States on January 8, 2026
★★★★★ 4
Wire length between the two connectors is short for a full-size pickup
Size: 16AWG Wiring Harness-2 Leads
I used the harness to wire ditch lights on opposite sides of a full-size pickup (F150). The wire between the 2 2-pin connectors was about 18 inches too short. Fortunately, splicing the wires from the (Nilight) ditch lights and the included pigtails gave barely enough length to reach the connectors. The connectors are buried inside the trim channel for the cowl; I'd have preferred they were exposed on each side to allow for easy swapping of the lights, but I can live with it. There is more than enough wire from the first connector to the relay for my all-under-hood installation, but I didn't think to measure if it would reach into the truck bed. The harness is of good quality and is a very good value. It would be a 5-star if it weren't for that little length issue.
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Reviewed in the United States on June 1, 2025
★★★★★ 5
great value
Size: 16AWG Wiring Harness-2 Leads
very affordable light install kit. worth the price just in the wiring connectors. I used this with my Nilight front bumper kit. i bypassed the button and wired high beam (+) to the yellow small wire. I did this so when the highbeams come on the light bar comes on. because with the stock arragement of this harness, the button continously draws power for the indicator LED
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Reviewed in the United States on April 30, 2026
★★★★★ 5
The Easiest!
Size: 16AWG Wiring Harness-2 Leads
This is one of the best and easiest wiring system to install that I have every used. And the price is great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2025
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