---
product_id: 538827349
title: "Automatic Duct Fan 4\" Inline Fan with Pressure Switch | Differential Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems"
brand: "ac infinity"
price: "KD 71.82"
currency: KWD
in_stock: true
url: https://www.desertcart.com.kw/products/538827349-automatic-duct-fan-4-inline-fan-with-pressure-switch-differential
store_origin: KW
region: Kuwait
---

# Auto-activation via pressure switch 5-speed PWM EC motor control 230 CFM airflow power Automatic Duct Fan 4" Inline Fan with Pressure Switch | Differential Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems

**Brand:** ac infinity
**Price:** KD 71.82
**Availability:** ✅ In Stock

## Summary

> 🌪️ Elevate your airflow game—smart, silent, and unstoppable!

## Quick Answers

- **What is this?** Automatic Duct Fan 4" Inline Fan with Pressure Switch | Differential Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems by ac infinity
- **How much does it cost?** KD 71.82 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/538827349-automatic-duct-fan-4-inline-fan-with-pressure-switch-differential)

## 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

- • **Durable & Compact:** Sleek 4-inch metal design with dual ball bearings ensures long-lasting, reliable performance.
- • **Quiet Yet Powerful:** Delivers robust 230 CFM airflow at a whisper-quiet 60 dBA—comfort without distraction.
- • **Versatile Installation:** Differential pressure switch supports any mounting position to optimize directional airflow.
- • **Effortless Airflow Boost:** Automatically activates with pressure changes—no manual tweaks needed.
- • **Precision Ventilation Control:** Five adjustable fan speeds powered by advanced PWM-controlled EC motor for tailored airflow.

## Overview

The AC Infinity Automatic Duct Fan 4" is a high-performance inline ventilation booster designed for industrial HVAC systems. Featuring a differential pressure switch for automatic activation, five-speed PWM-controlled EC motor for precise airflow management, and a compact 4-inch metal build, it delivers 230 CFM airflow quietly at 60 dBA. Its versatile mounting and durable dual ball bearings make it the go-to choice for efficient, hassle-free duct ventilation.

## Description

Automatic Duct Fan 4", Inline Fan with Differential Fan Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems

## 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 |
|---------------|-------|
| Brand | AC Infinity |
| Model Number | AC-BFP4 |
| Color | Black |
| Product Dimensions | 30.23 x 17.53 x 18.8 cm; 2.27 kg |
| Power / Wattage | 31.44 watts |
| Voltage | 12 Volts |
| Material | Metal |
| Number of Speeds | 5 |
| Noise Level | 60 dB |
| Compatible Models | Switch |
| Special Features | Pressure Switch |
| Item Weight | 2.27 Kilograms |

## Product Details

- **Product dimensions:** 30.2L x 18.8W x 17.5H centimeters
- **Brand:** AC Infinity
- **Power connector type:** 2-Pin
- **Voltage:** 12 Volts
- **Wattage:** 31.44 watts

## Images

![Automatic Duct Fan 4" Inline Fan with Pressure Switch | 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)

## Available Options

This product comes in different **Color, Size** options.

## Frequently Bought Together

- AC Infinity Automatic Duct Fan 4", Inline Fan with Differential Fan Pressure Switch, Air Vent Booster Fan for Industrial HVAC Ducting Ventilation Exhaust Systems
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**Shop now:** [https://www.desertcart.com.kw/products/538827349-automatic-duct-fan-4-inline-fan-with-pressure-switch-differential](https://www.desertcart.com.kw/products/538827349-automatic-duct-fan-4-inline-fan-with-pressure-switch-differential)

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-09-03*