Novelty Manufacturing Co.
Prevent-It Soffit Vents 4 Inch - Only Design That Prevents Moist Air from Re-Entering Home, under Eave Exterior Vents for Bathroom Exhaust Fan, Screws Included, White, 1-Pack
Prevent-It Soffit Vents 4 Inch - Only Design That Prevents Moist Air from Re-Entering Home, under Eave Exterior Vents for Bathroom Exhaust Fan, Screws Included, White, 1-Pack
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- Patented design and only soffit vent built to direct moist bathroom air away from the soffit, not under it. This prevents several issues, including water and roof damage, increased moisture resulting in higher heating and air conditioning costs, and indoor air quality issues that can impact health.
- Scientifically proven to displace the most amount of exhausted air away from the home (95%+ of moist air). Don't put your family's wellness or the health of your home at risk by using a less effective, cheap soffit vent.
- Damper/flap provides a closed system that prevents pests and air from entering home. The small front grill openings help increase air speed to push moisture over the soffit edge.
- Easy to install; easy to clean via removable screen; fits a 4-inch vent hose (4 screws included).
- Durable resin plastic that's weather resistant; Made in the USA.
Product Description
How Our Soffit Vent Works
IMPORTANT: Our soffit vent is designed for use with bathroom exhaust fans only. Installing a sister joint or cross brace is recommended to prevent the soffit from sagging. For best performance, use a bath fan between 50-80 CFM and install the vent exist at the outermost edge of the soffit if possible. You should also minimize or eliminate the use of flex duct since that restricts air flow and causes louder fan noise.
Soffit Vent Specifications
| Usage | Bathroom exhaust fan only (up to 110 CFM) |
| Size/Fit | Meant for 4" vent hose |
| Dimensions | 11.25"L x 7.85"W x 3.75"H |
| Hardware | 4 screws (#8-15 x 1") included; for flex duct installation we recommend using a zip tie (not included); for hard duct installation you'll need to seal connection with tape or caulk (not included) |
| Weather Resistance | UV-Protected, Water & Frost Resistant |
| Colors | White, Black, Brown |
| Material | Resin plastic |
| Cleaning | Easy to clean via removable screen |
| Damper | Includes built-in damper/flap; closed system prevents pests & air entering duct |
| Manufactured | United States |
How to Install the PreVent-It 4" Bathroom Soffit Vent
Step 1Measure a 4.5 inch diameter minimum cut where you will install the soffit vent. | Step 2Pull transition flex duct through opening and attach to top of soffit vent using a zip tie (not provided). For hard duct installation, pull transition duct through opening, attach duct and soffit vent, seal connection with tape or caulk (not provided). | Step 3Push attached duct and soffit vent into hole. Attach to soffit using four (4) provided screws. NOTE: You will see 6 screw holes; you do not need to put screws in the 2 holes nearest the screen. |
Frequently Asked Questions
Is it OK for a bathroom soffit vent to discharge under the soffit?
No, this is a common misconception. Soffit vents should not discharge air under the soffit. That incorrect venting risks putting the health of your home and family at risk. Our soffit vent's design correctly displaces moist bathroom air away from the home and helps prevent the following issues that other vents can cause: Water and roof damage, higher heating and air conditioning costs, increased moisture in the attic which can cause rafter degradation, early deterioration of roof shingles, and indoor air quality issues that can impact health.
How is the PreVent-It soffit vent different from other soffit vents?
Unlike other soffit vents, our patented vent: 1. Is the only bathroom soffit vent that can accurately claim that it moves the exhausted air away from the house, preventing entry into the attic via the soffit. 2. Makes venting bath fans through the soffit the ideal method of venting. Our soffit vent eliminates roof penetrations and long exhaust ducts to a gable wall. Homeowners and builders can now vent bath fans without risking damage and indoor air quality issues in the attic.
Why should I use a PreVent-It bathroom soffit vent instead of a roof vent?
You should use our soffit vent over a roof vent because: 1. Roof venting bath fans increase the risk of roof leaks, water damage, and indoor air quality issues. Roof penetrations are the leading cause of roofing system failures. 2. Venting through the soffit is the least invasive and lowest-risk option – having a minimal impact on the roof and siding systems. Keep in mind this is only true if you use our soffit vent given its patented design. 3. Minimizing roof penetrations improves curb appeal by streamlining the design of your roof.
Why should I use the PreVent-It soffit vent instead of a gable wall vent?
Using our bathroom soffit vent is better than using a gable wall vent because: 1. Gable venting bath fans often require lengthy exhaust ducts, increasing the risk of condensation in the duct, potentially causing damage and indoor air quality issues. 2. Lengthy exhaust ducts decrease fan pushing power. Gable venting is not ideal for low-speed fans because the fan cannot push the exhausted air out of the house. Venting through the soffit using our soffit vent uses a shorter exhaust duct system because most bathrooms are on an exterior wall directly below the soffit. Shorter exhaust systems promote the removal of the exhausted air. 3. Gable venting exhaust ducts are exposed to attic temperature fluctuations, which can promote condensation, damage, and indoor air quality issues. Conversely, using the PreVent-It soffit vent to vent through the soffit positions the exhaust duct system under the attic insulation, protecting the duct from attic temperature fluctuations.
Who invented the PreVent-It soffit vent and why?
The PreVent-It soffit vent was created by a remediation expert. When asked to remediate exhaust issues she couldn’t find a viable solution, so she created one. She kept seeing the same problems caused by venting bath fans through the soffit using conventional soffit vents – damage and indoor air quality issues. Despite the problems observed by venting bath fans through the soffit, she believed venting through the soffit was still the best option to vent if the exhausted air was “thrown” away from the soffit’s passive air stream. PreVent-It's soffit vent achieves that goal: proper and thorough removal of the exhausted air away from the house, solving the problem that all other soffit vents perpetuate. Now, venting through the soffit is ideal for builders and homeowners.
About Lancaster Home Products
For over 100 years our parent company, Novelty Manufacturing Co, has been manufacturing quality home and garden products in Lancaster, Pennsylvania. In 2022, we established a new home improvement products brand called Lancaster Home Products. We make it easy to find high-quality, made in USA home products for a variety of indoor and outdoor applications—all from the comfort of your home—without breaking your budget.
Out of Lancaster Home Products came the PreVent-It soffit vent. PreVent-It's mission is to solve ongoing challenges that have not been addressed so that we can help builders, renovation leaders, and homeowners. Our goal is to make people's homes safer and more energy efficient. Our patented soffit vent accomplishes that goal by solving long-standing problems in the industry.
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