---
product_id: 541750886
title: "PreVent-It 4 Inch Soffit Vent for Bathroom Exhaust Fans, White, 1-Pack | Only under eave vent that prevents moist air re-entry; easy to install; damper keeps pests and drafts out; Made in USA"
brand: "lancaster home products"
price: "$108.11"
currency: USD
in_stock: true
category: "Lancaster Home Products"
url: https://www.desertcart.us/products/541750886-prevent-it-4-inch-soffit-vent-for-bathroom-exhaust-fans
store_origin: US
region: United States of America
---

# 95%+ moist air displacement Easy install with screws included Built-in damper blocks pests & drafts PreVent-It 4 Inch Soffit Vent for Bathroom Exhaust Fans, White, 1-Pack | Only under eave vent that prevents moist air re-entry; easy to install; damper keeps pests and drafts out; Made in USA

**Brand:** lancaster home products
**Price:** $108.11
**Availability:** ✅ In Stock

## Summary

> 💨 Keep your home fresh and dry with the vent that actually works!

## Quick Answers

- **What is this?** PreVent-It 4 Inch Soffit Vent for Bathroom Exhaust Fans, White, 1-Pack | Only under eave vent that prevents moist air re-entry; easy to install; damper keeps pests and drafts out; Made in USA by lancaster home products
- **How much does it cost?** $108.11 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/541750886-prevent-it-4-inch-soffit-vent-for-bathroom-exhaust-fans)

## Best For

- lancaster home products enthusiasts

## Why This Product

- Trusted lancaster home products brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Pest & Draft Barrier:** Integrated damper flap creates a sealed system preventing pests and unwanted air infiltration for a healthier home environment.
- • **Superior Airflow Efficiency:** Scientifically proven to displace over 95% of bathroom exhaust moisture, reducing HVAC costs and improving indoor air quality.
- • **Durable Weather-Resistant Build:** Made from high-quality resin plastic in the USA, designed to withstand outdoor elements season after season.
- • **Patented Moisture-Deflecting Design:** Only soffit vent that directs moist air away from your home’s soffit, protecting your roof and walls from water damage.
- • **Effortless Installation & Maintenance:** Fits standard 4-inch vent hoses with included screws and features a removable screen for quick cleaning.

## Overview

The PreVent-It 4 Inch Soffit Vent is a patented, high-efficiency bathroom exhaust vent designed to prevent moist air from re-entering your home. It displaces over 95% of moisture, protects against water damage, blocks pests with a built-in damper, and is easy to install with included screws. Made from durable, weather-resistant resin plastic in the USA, it fits standard 4-inch vent hoses and is ideal for fans up to 110 CFM.

## Description

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 - desertcart.com

## Features

- 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. Note: Meant for bath fans up to 110 CFM. Higher CFM fans may experience louder fan noise and restricted air flow.
- 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C94LSV37 |
| Air Flow Capacity | 110 Cubic Feet Per Minute |
| Best Sellers Rank | #25,579 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Soffit Vents |
| Blade Material | Plastic |
| Brand Name | Lancaster Home Products |
| Collection Name | Bathroom,Home |
| Color | White |
| Control Method | Touch |
| Controller Type | Button Control |
| Customer Reviews | 4.6 4.6 out of 5 stars (331) |
| 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 |
| Is Product Cordless | No |
| 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 Power Levels | 1 |
| Number of Speeds | 10 |
| Part Number | 42502.01 |
| Power Source | Corded Electric |
| Recommended Uses For Product | Exhausting Bathroom Fan, Ventilating |
| Room Type | Bathroom |
| Size | 4" Soffit Vent |
| Smart Home Compatibility | Not Smart Home Compatible |
| 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 | 1.00 Count |

## Product Details

- **Brand:** Lancaster Home Products
- **Color:** White
- **Electric fan design:** Exhaust Fan
- **Mounting Type:** Roof Mount
- **Power Source:** Corded Electric
- **Product Dimensions:** 11.25"D x 7.85"W x 3.75"H
- **Recommended Uses For Product:** Exhausting Bathroom Fan, Ventilating
- **Room Type:** Bathroom
- **Style:** 4" Soffit Vent

## Images

![PreVent-It 4 Inch Soffit Vent for Bathroom Exhaust Fans, White, 1-Pack | Only under eave vent that prevents moist air re-entry; easy to install; damper keeps pests and drafts out; Made in USA - Image 1](https://m.media-amazon.com/images/I/41v6hub2cSL.jpg)

## Available Options

This product comes in different **Color, Item Package Quantity** options.

## Frequently Bought Together

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-07*