---
product_id: 531396534
title: "Automatic Duct Fan 4\", Inline Fan with Differential Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems"
brand: "ac infinity"
price: "1717 kr"
currency: DKK
in_stock: true
category: "Ac Infinity"
url: https://www.desertcart.dk/products/531396534-automatic-duct-fan-4-inline-fan-with-differential-pressure-switch
store_origin: DK
region: Denmark
---

# 230 CFM airflow Auto pressure-activated 60 dBA noise level Automatic Duct Fan 4", Inline Fan with Differential Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems

**Brand:** ac infinity
**Price:** 1717 kr
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your airflow game—smart, silent, and seamless ventilation.

## Quick Answers

- **What is this?** Automatic Duct Fan 4", Inline Fan with Differential Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems by ac infinity
- **How much does it cost?** 1717 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/531396534-automatic-duct-fan-4-inline-fan-with-differential-pressure-switch)

## Best For

- ac infinity enthusiasts

## Why This Product

- Trusted ac infinity brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Energy-Smart Design:** 31.44W power consumption with dual ball bearings for long-lasting, efficient operation.
- • **Effortless Airflow Boost:** Automatically activates with pressure sensing—no manual switches needed.
- • **Omnidirectional Mounting:** Install vertically, horizontally, or diagonally to fit your unique duct layout.
- • **Whisper-Quiet Performance:** Advanced EC motor keeps noise low at just 60 dBA—work or relax undisturbed.
- • **Precision Ventilation Control:** Five PWM-controlled fan speeds for tailored airflow in any space.

## Overview

The AC Infinity Automatic Duct Fan 4" is a versatile inline booster fan designed for industrial and residential HVAC systems. Featuring a differential pressure switch, it automatically activates based on duct pressure changes, eliminating manual control. With 230 CFM airflow, five PWM-controlled speeds, and omnidirectional mounting, it ensures precise and flexible ventilation. Its quiet 60 dBA operation and energy-efficient EC motor make it ideal for enhancing airflow in long or complex duct runs, improving heating and cooling delivery effortlessly.

## Description

Buy AC Infinity Automatic Duct Fan 4", Inline Fan with Differential Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems: Ventilation Fans - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- Inline duct fan for boosting airflow in ducting and vent systems to ensure heating or cooling delivery.
- Automatically activates the ventilation fan by detecting pressure change to eliminate manual adjusting.
- Differential pressure switch supports mounting in any position to improve directional airflow versatility.
- Features five fan speed levels powered by the PWM-controlled EC motor for more precise ventilation.
- Duct Size: 4” | Dim: 6.9 x 11.9 x 7.4 in. | Airflow: 230 CFM | Noise: 60 dBA | Bearings: Dual Ball

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C2W14V6L |
| Air Flow Capacity | 230 Cubic Feet Per Minute |
| Best Sellers Rank | #138,420 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #416 in Household Ventilation Fans |
| Brand | AC Infinity |
| Compatible Devices | Transmission Coolers |
| Cooling Method | Air |
| Date First Available | April 18, 2023 |
| Global Trade Identification Number | 00819137023789 |
| Item Weight | 4.99 pounds |
| Item model number | AC-BFP4 |
| Manufacturer | AC Infinity |
| Material | Metal |
| Noise Level | 60 Decibels |
| Number of Items | 1 |
| Power Connector Type | 2-Pin |
| Product Dimensions | 11.9"L x 6.9"W x 7.4"H |
| UPC | 819137023789 |
| Voltage | 12 Volts |
| Wattage | 31.44 watts |

## Product Details

- **Air Flow Capacity:** 230 Cubic Feet Per Minute
- **Brand:** AC Infinity
- **Compatible Devices:** Transmission Coolers
- **Cooling Method:** Air
- **Material:** Metal
- **Noise Level:** 60 Decibels
- **Power Connector Type:** 2-Pin
- **Product Dimensions:** 11.9"L x 6.9"W x 7.4"H
- **Voltage:** 12 Volts
- **Wattage:** 31.44 watts

## Images

![Automatic Duct Fan 4", Inline Fan with Differential Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems - Image 1](https://m.media-amazon.com/images/I/51DcPrezDUL.jpg)

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.dk/products/531396534-automatic-duct-fan-4-inline-fan-with-differential-pressure-switch](https://www.desertcart.dk/products/531396534-automatic-duct-fan-4-inline-fan-with-differential-pressure-switch)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-22*