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💨 Keep your home fresh & protected with the vent that works smarter, not harder!
The PreVent-It 4 Inch Soffit Vent is a patented, high-performance bathroom exhaust vent designed to direct over 95% of moist air away from your home's soffit, preventing water damage and improving indoor air quality. Featuring a built-in damper to block pests and drafts, it fits standard 4-inch ducts and includes all mounting hardware for easy installation. Made from durable, weather-resistant resin plastic and proudly manufactured in the USA, this vent is optimized for bathroom fans up to 110 CFM, ensuring efficient ventilation and long-lasting protection.










| ASIN | B0C94LSV37 |
| Air Flow Capacity | 110 cfm |
| Best Sellers Rank | #36,798 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Soffit Vents |
| Blade Material | Plastic |
| Brand | Lancaster Home Products |
| Brand Name | Lancaster Home Products |
| Collection Name | Bathroom,Home |
| Color | White |
| Control Method | Touch |
| Controller Type | Button Control |
| Customer Reviews | 4.7 out of 5 stars 345 Reviews |
| Electric Fan Design | Exhaust Fan |
| Electric fan design | Exhaust Fan |
| Finish Type | Painted |
| Included Components | 4 Screws (#8-15 x 1"), Soffit Vent |
| Indoor Outdoor Usage | Outdoor |
| Installation Type | Permanent Installation |
| Item Dimensions D x W x H | 11.25"D x 7.85"W x 3.75"H |
| Item Type Name | Soffit Vent |
| Item Weight | 14.56 ounces |
| Main Power Connector Type | Standard Household Plug (e.g., Type A, Type B) |
| Manufacturer | Novelty Manufacturing Co. |
| Material | Plastic |
| Model Name | PreVent-It Bathroom Soffit Vent |
| Model Number | 42502.01 |
| Mounting Type | Roof Mount |
| Number of Packs | 1 |
| Number of Power Levels | 1 |
| Number of Speeds | 10 |
| Part Number | 42502.01 |
| Power Source | Undereave Vent |
| Product Dimensions | 11.25"D x 7.85"W x 3.75"H |
| Recommended Uses For Product | Exhausting Bathroom Fan, Ventilating |
| Room Type | Bathroom |
| Size | 4" Soffit Vent |
| Special Features | Built-in damper/flap provides a closed system, Easy to install & screws included, High-quality, durable resin plastic that's weather resistant, Made in USA, Patented design better ventilates bathroom exhaust |
| Standby Power Shutoff | High Efficiency |
| Style | 4" Soffit Vent |
| Switch Type | Push Button |
| UPC | 026978425027 |
| Unit Count | 1 Count |
T**.
A good choice.
A well made and sturdy vent. Build in baffle prevents drafts from entering. Looks good and functions perfectly. Very easy to install. The unit is a little large but I had the room for it. Ended up looking great. Very pleased.
B**I
Worth the Money
This was so easy to install and it looks great on my soffit. When my bathroom fan is turned on I can easily feel the airflow coming from the hose. It's made from very sturdy material.
B**Y
Easy install, great idea to address this problem.
They product seems like it is durable and will stand the test of time. It seems more durable than the flimsy plastic vents you buy at the store. My house is 17 years old was missing a few soffit vents. All my soffits are vented for air flow so this is the only product I found in the market that will push the airflow away from your soffits. I ended up buying and installing 5 of these and they were pretty easy to put in. My only feedback would be to provide some longer screws. Sometimes I was drilling into the slots where the soffit overlaps and I either had to drill at an angle or jam it up in there to hit some soffit material. Other than that, they are a great idea and solved my problem. 5 stars would buy again.
E**R
Good vent
The shrink wrap packaging slightly deformed the vent, so the flapper did not close completely. I used a hair dryer to warm the vent plastic a bit, then held the vent in the correct shape until it cooled. Works fine now!
T**D
Easy to install
Great product. Easy to install in my soffit. Product comes white but I spray painted it tan to match my soffits. Came out great after painting.
S**L
Worth the money
Nice unit. Easy install . It gives you enough room on the sides to drill a large enough hole to pull down insulated duct. Plastic is thicker than most cheaper vents.
J**S
The GO TO Vent for Soffit Installs
This is the go to bathroom exhaust vent is you have to install it under your soffit, especially when the soffit ventilation is right there by your install. Designed to channel your moist bathroom air away from the perforated soffits so no moist air returns to the attic. Easy to clean vent baffle and screen in the front. A bit more expensive than some of the simpler, smaller vents but well worth it. NOTE: If your venting through the outside wall, there's no real advantage to this vent. But if you're going through the soffit, get this product. You'll be glad you did. Remember in cold climates to insulate the duct from the fan to the vent.
J**.
Glad I found this!
Works great to push the air away from soffit. Matches my black soffit. easy to install. I have a 2 ft overhang, so this works and if ice icicles do form, there is room so it doesn't block the vent
C**E
Good but overpriced and I'm not convinced
The design is very effective and as far as I know there is nothing like this in the UK market. However this is ridiculously over priced for what is a cheap plastic product. There is a back draft flap but I'm not convinced it will be either robust or effective - the fit is poor and for the price there should be zero friction at the pivot point.
C**N
Bien fait
Très bien pensé mais un peu trop dispendieux ce n'est pas en métal mais en plastique
R**Y
Un peut cher mais fais la job
Évans de chambre de bain pour sophite Tres peut de model font la job mais se model travaille tres bien pour l'installation sous sophite Pour ceux qui installe leur sortie sur le toit avec une trappe approprier c'est tres bien mais avec quelque bordé de neige tout est pris dans la glace et ca ne fonctionne plus et vous étes due pour une petite visite sur votre toit
C**C
EXPENSIVE and kind of small, not to much alternative...
EXPENSIVE, I had to build a box to make it fit ( I use Fascia Aluminum & pop rivets) — I’m installing the fan right now and will come back to review. I’m a bit unsure about the front grill being too restrictive as the vent is kind of small itself. If restricted, I will cut the front grid and build a replacement.
W**.
Great design
Needed this after constantly having ice dams forming around the vent through the roof all winter. Venting heated air through a roof that can get up to 3’ of snow is the dumbest idea ever. Many people worry about the moisture getting in the attic with this vent but the design clearly prevents that. Moist air would clearly rise up over the gutters. I occluded the two rafter vents on either side of this vent as well just as a precaution. If you wanted to you could also put non vented, solid soffits on either side of this vent as well. My flapper is stuck for some reason, I was probably going to remove it anyway, moist air is going to cause ice around the opening all winter and will freeze shut the flapper anyway. But going up there once a month to take the easily removable cap off and clear ice is a lot better that chipping away at ice dams and the water damage that comes with it.
Trustpilot
1 month ago
2 weeks ago