---
product_id: 89052179
title: "Fantech Rn2 Radon Mitigation Fan, 4.5 in Duct, 123 CFM, Residential System"
brand: "fantech"
price: "R7177"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Fantech"
url: https://www.desertcart.co.za/products/89052179-fantech-rn2-radon-mitigation-fan-4-5-in-duct-123
store_origin: ZA
region: South Africa
---

# Wet location rated Ultra-quiet 25 dB noise level 123 CFM airflow Fantech Rn2 Radon Mitigation Fan, 4.5 in Duct, 123 CFM, Residential System

**Brand:** fantech
**Price:** R7177
**Availability:** ✅ In Stock

## Summary

> 🌬️ Quiet power that keeps your home safe and fresh — don’t let radon linger!

## Quick Answers

- **What is this?** Fantech Rn2 Radon Mitigation Fan, 4.5 in Duct, 123 CFM, Residential System by fantech
- **How much does it cost?** R7177 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/89052179-fantech-rn2-radon-mitigation-fan-4-5-in-duct-123)

## Best For

- fantech enthusiasts

## Why This Product

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

## Key Features

- • **Leak-Proof Durability:** Vibration welded seams ensure a sealed, long-lasting housing.
- • **Versatile Installation:** Indoor, outdoor, or wet location rated for ultimate flexibility.
- • **Whisper-Quiet Operation:** At just 25 decibels, enjoy peace of mind without disruptive noise.
- • **Powerful 123 CFM Airflow:** Efficiently clears radon with industry-leading ventilation capacity.
- • **Easy Replacement & Compatibility:** Fits standard 4.5” ducts and plugs into existing setups seamlessly.

## Overview

The Fantech Rn2 Radon Mitigation Fan delivers a robust 123 CFM airflow at 0.50” static pressure, ensuring effective radon reduction. Engineered with vibration welded seams for leak-proof durability, it operates ultra-quietly at 25 decibels and is rated for indoor, outdoor, and wet locations. Designed for easy replacement with standard 4.5” duct compatibility, this 12V, 58-watt fan is a reliable, professional-grade solution for residential radon mitigation.

## Description

Ideally tailored performance curve for a vast majority of your mitigations. This fan model can be mounted both indoor, outdoor and in wet locations.

Review: Perfect replacement for old Fantech HP190 radon fan - I had an old Fantech HP190 radon fan in my attic that was getting very loud. I replaced it with the new Rn2 model and am quite happy. The Rn2 seems well built. The Rn2 is slightly shorter and has different size connectors than the HP 190, but I had no problem finding some flexible PVC couplings that worked perfectly at the local hardware store (I used a 4" x 4" on bottom and 4" x 3" on top). The bigger problem was that whoever originally installed the fan used 3" PVC pipe with 4" adapters cemented in the ends. That gave the fan a little more stability, but made it impossible to slide the coupler up the pipe to remove/replace the fan. I ended up having to cut off the top 4" PVC adapter along with some 3" pipe back far enough that would allow me to add a standard 3" PVC coupler and 3" PVC pipe to get it to the right height so that the fan could easily slip in, but still allow the coupler to slide up the pipe for installation/removal. Wiring up the new fan was no problem, I just used the plug from the old fan. The new fan is working great and quiet. Fantech included a tootsie pop and an "Our fans suck" stick in the box for fun.
Review: Works like a Charm - Ordered this to replace an existing unit that had a loud horrible humming noise. Installation was quick and easy and now it’s super quiet. Worth every penny.

## Features

- Standard 4 ½” pipe size
- 123cfm @ 0.50”sp and 20cfm @ 1.75”sp
- Vibration welded seam ensures leak-proof housing
- Formerly the HP2190Q

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07F6ZYG3B |
| Air Flow Capacity | 220 Cubic Feet Per Minute |
| Best Sellers Rank | #157,356 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #631 in Household Ventilation Fans |
| Brand | FANTECH |
| Brand Name | FANTECH |
| Compatible Devices | Desktop |
| Cooling Method | Air |
| Customer Reviews | 4.6 out of 5 stars 543 Reviews |
| Global Trade Identification Number | 00650737890520 |
| Item Dimensions L x W x H | 13.25"L x 13.25"W x 11"H |
| Item Type Name | Radon Fan - 4.5" Duct - 123 cfm |
| Item Weight | 16 ounces |
| Manufacturer | Fantech |
| Material Type | Engineered Plastic |
| Maximum Rotational Speed | 1500 RPM |
| Model | Rn2 |
| Noise Level | 25 Decibels |
| Number of Items | 1 |
| Part Number | Rn2 |
| Power Connector Type | 4-Pin |
| Product Dimensions | 13.25"L x 13.25"W x 11"H |
| UPC | 650737020903 650737890520 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Wattage | 58 watts |

## Product Details

- **Brand:** FANTECH
- **Compatible Devices:** Desktop
- **Cooling Method:** Air
- **Material:** Engineered Plastic
- **Maximum Rotational Speed:** 1500 RPM
- **Noise Level:** 25 Decibels
- **Power Connector Type:** 4-Pin
- **Product Dimensions:** 13.25"L x 13.25"W x 11"H
- **Voltage:** 12 Volts
- **Wattage:** 58 watts

## Images

![Fantech Rn2 Radon Mitigation Fan, 4.5 in Duct, 123 CFM, Residential System - Image 1](https://m.media-amazon.com/images/I/41GV26vj7US.jpg)
![Fantech Rn2 Radon Mitigation Fan, 4.5 in Duct, 123 CFM, Residential System - Image 2](https://m.media-amazon.com/images/I/71haWhohVaL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Looking at "b 4.5".  current one is 4", to 3" pipes.  other reviews/questions + product title indicate this is 4".  is it 4" or 4.5"?**
A: Always think pipe dimensions (the ID of the pipe) when dealing with pipe.  The Rn2's top and bottom connections are 4.5" OD nominal which translates to 4" pipe. You use a 4x3 Flex Coupling with the Rn2 and 3" PVC pipe.  The PVC vent pipe is usually 3" which translates to 3.5" OD x 3" ID Schedule 40 PVC.

**Q: how many square feet of basement with a sump pump will this service**
A: Basing fan selection on square footage of a basement is not exact since air flows will vary based on many factors. But in most cases the RN2 should be fine up to about 2500 sq/ft. This is a 4" fan so using 4" pipe will give the best results.

**Q: Can this fan be on a switch and turned off when we are away?**
A: As a radon professional, most of the fan failures I've seen in 20 years are when fans have been off for a period.  Soil moisture coming out of the pipe and condensing on the metal parts (bearings) can ruin them.  They seem to be good for at least 15 years running continuously when properly installed.  If you have to shut it off, remove and store the fan and replace the space left by the fan with solid pipe so you don't have any other moisture issues.  Shut off switches located near these fans is an NEC safety code requirement.  Radon levels go right back up a few hours after turning a fan off and the converse is true.

**Q: The rn-1 is advertised on amazon as 90cfm. why does the sticker on my rn-1 say 130 cfm ?**
A: I don’t know. I have a rn-2 fan which is 130 cfm.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect replacement for old Fantech HP190 radon fan
*by D***R on December 10, 2018*

I had an old Fantech HP190 radon fan in my attic that was getting very loud. I replaced it with the new Rn2 model and am quite happy. The Rn2 seems well built. The Rn2 is slightly shorter and has different size connectors than the HP 190, but I had no problem finding some flexible PVC couplings that worked perfectly at the local hardware store (I used a 4" x 4" on bottom and 4" x 3" on top). The bigger problem was that whoever originally installed the fan used 3" PVC pipe with 4" adapters cemented in the ends. That gave the fan a little more stability, but made it impossible to slide the coupler up the pipe to remove/replace the fan. I ended up having to cut off the top 4" PVC adapter along with some 3" pipe back far enough that would allow me to add a standard 3" PVC coupler and 3" PVC pipe to get it to the right height so that the fan could easily slip in, but still allow the coupler to slide up the pipe for installation/removal. Wiring up the new fan was no problem, I just used the plug from the old fan. The new fan is working great and quiet. Fantech included a tootsie pop and an "Our fans suck" stick in the box for fun.

### ⭐⭐⭐⭐⭐ Works like a Charm
*by B***T on September 18, 2025*

Ordered this to replace an existing unit that had a loud horrible humming noise. Installation was quick and easy and now it’s super quiet. Worth every penny.

### ⭐⭐⭐⭐⭐ Quiet Powerhouse — Better Suction with Less Noise
*by C***S on January 31, 2026*

Performance: While the fan is rated for lower Cubic Feet per Minute (CFM) than what it replaced, it excels in Static Pressure capability. On a standard U-tube manometer, the suction increased from 1.18" WC to 1.25" WC. Acoustics: The noise reduction is the standout feature. With my measured exterior noise dropping from 64.7 dB to 56.1 dB represents a near 50% reduction in perceived loudness.

## Frequently Bought Together

- Fantech RN2 Radon Fan | 4 Inch | Quiet and Efficient Radon Mitigation | 220 Cfm White
- Power Cord Kit - 6 foot
- Fantech FRIK 2190-3 Radon Fan Install Kit Works with HP 2133 and HP 2190, 3"

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-07-21*