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RADON411

Fantech

Fantech Rn2

Inline radon mitigation fan

  • Radon fan
  • 3 or 4 in. schedule 40 PVC, with Fantech LDVI couplings (sold separately)
  • 59 W
  • Fantech Rn2

Photos: Fantech

  • Pipe size3 or 4 in. schedule 40 PVC, with Fantech LDVI couplings (sold separately)
  • Power draw59 W
  • Every figure checked against the specifications Fantech publishes
  • The maker's own performance table, point by point, unranked
Tests that check it works

About this item

As Fantech states it

  • Motor: AC
  • Pipe size: 3 or 4 in. schedule 40 PVC, with Fantech LDVI couplings (sold separately)
  • Max static pressure: 2.0 in w.c.
  • Max airflow: 174 CFM
  • Max power: 59 W
  • Power supply: 120 V, single phase, 60 Hz
  • Speed control: None
  • Airflow at static pressure: 160 CFM at 0.00 in w.c.; 150 at 0.20; 120 at 0.50; 80 at 1.00; 40 at 1.50
  • Outdoor use: Rated for outdoor installation
  • Warranty: Five (5) year factory limited warranty

The Rn2 is Fantech's mid-range inline fan for active soil depressurization: a sealed plastic housing with an external rotor motor, made for 3 or 4 inch PVC pipe and rated by Fantech for indoor, outdoor and wet locations. Fantech lists an application range of 0 to 1.8 inches of water column and a maximum of 59 W.

What you get

Fantech's manual lists one inline radon fan and one operation and installation manual in the box. The LDVI couplings that join the fan to the pipe are sold separately, in 4 by 3 and 4 by 4 inch pairs. The housing measures 10 inches across and 9 1/4 inches high, with a 4 15/32 inch connection.

In the box and running costs

How it works

What it does and how

The suction, the airflow and the housing, then who has checked it

How it works

In our words, from the maker's documents

A radon fan is the part of an active soil depressurization system that runs all the time. The EPA's guide describes the vent fan drawing radon gas from below the home through the suction pipes and releasing it to the outdoor air, while creating a negative pressure or vacuum under the slab. The fan has to keep running for the system to work.

Two numbers describe what a fan can do. Static pressure, in inches of water column, is how hard it can pull against the resistance of the soil and the pipe; airflow, in cubic feet per minute, is how much air it moves. Airflow falls as pressure rises, so a fan is described by a curve, not a single figure, and a mitigator picks the fan whose curve suits the suction a house needs.

Fantech's manual gives the Rn2's curve as a table: 160 CFM at 0.00 inches, 150 at 0.20, 120 at 0.50, 80 at 1.00 and 40 at 1.50, with a maximum of 1.97 inches, at 120 V, 0.48 A and 58.0 W. Its 2025 brochure rounds the figures differently, listing a maximum static pressure of 2.0 inches, a maximum of 59 W and a maximum of 174 CFM, and an application pressure range of 0.0 to 1.8 inches. The Rn2's sales sheet defines that range as where the fan moves about 20 CFM or more, and the maximum as where it runs but moves no air.

Fantech's brochure places the Rn2 in the middle of its Rn line: the Rn 1 for low suction and low flow with good sub-slab communication, the Rn2 for medium suction and low flow with moderate communication, and the Rn 2X and Rn 3 for medium suction and medium flow where radon levels are elevated or communication is poor. Its sales sheet calls the Rn2 the standard for radon mitigation, with a performance curve tailored to the majority of mitigations.

The housing is what keeps soil gas in the pipe. Fantech describes a fully sealed plastic housing joined by vibration welding into a single piece, with a seam it calls inherently air tight. The motor is an external rotor type, thermally protected with automatic reset, and the wiring enclosure is built into the housing. The fan has no built-in speed control: Fantech puts a built-in speed controller on its Rn 2EC and Rn 4EC, and its manual warns against using these fans with any solid state speed control device.

What the manufacturer says

Fantech's own statements, attributed

  • Fantech saysFantech states the Rn2 can be mounted indoor, outdoor and in wet locations.
  • Fantech saysFantech lists the Rn2 at 0.0 to 1.8 in. w.c. application range, 2.0 in. w.c. maximum static pressure, 59 W maximum power and 174 CFM maximum airflow.
  • Fantech saysFantech states its radon fans are tested by Underwriter Laboratories and deemed suitable for outdoor use under UL 507.
  • Fantech saysFantech gives the Rn series a five-year factory limited warranty.
  • Fantech saysFantech describes the Rn2's housing as fused by vibration welding into a single piece with an air-tight seam.

These are Fantech's own statements, attributed to it. They are not our findings, and we have not tested this product ourselves.

Independent evidence

Who checks a device like this

C-NRPP's consumer evaluation covers electronic radon monitors, not mitigation fans, so it has no result for Fantech Rn2. The safety listing and performance certification the maker states are under “What the manufacturer says”, and what shows whether any fan is working in your home is a radon test after it is installed.

Specifications

Specifications

Every figure as the maker states it

The maker's figures

Type
Mitigation fan, inline
Motor
AC
Pipe size
3 or 4 in. schedule 40 PVC, with Fantech LDVI couplings (sold separately)
Max static pressure
2.0 in w.c.
Max airflow
174 CFM
Max power
59 W
Power supply
120 V, single phase, 60 Hz
Speed control
None
Airflow at static pressure
160 CFM at 0.00 in w.c.; 150 at 0.20; 120 at 0.50; 80 at 1.00; 40 at 1.50
Outdoor use
Rated for outdoor installation
Warranty
Five (5) year factory limited warranty

What is in the box

Fantech's manual lists one inline radon fan and one operation and installation manual in the box. The LDVI couplings that join the fan to the pipe are sold separately, in 4 by 3 and 4 by 4 inch pairs. The housing measures 10 inches across and 9 1/4 inches high, with a 4 15/32 inch connection.

The warranty is Fantech's five-year factory limited warranty. A factory return needs a Return Materials Authorization number from Fantech and a copy of the bill of sale.

What it costs to run

The running cost is electricity: the fan runs around the clock, and Fantech lists 58.0 W in its manual's table and a 59 W maximum in its brochure. Your utility rate sets what that costs. There is no filter or other consumable.

Plan on the fan wearing out eventually. The EPA's guide says fans may last five years or more and that manufacturer warranties tend not to exceed five years, which matches the five years Fantech gives. A warning device and periodic retests are what tell you it is still doing its job.

Airflow at each pressure

Fantech's performance table, point by point

Static pressureAirflow
0.00 in w.c.
160 CFM
0.20 in w.c.
150 CFM
0.50 in w.c.
120 CFM
1.00 in w.c.
80 CFM
1.50 in w.c.
40 CFM

Airflow falls as the suction the system needs rises. A mitigator matches the fan to pressure measured under the slab.

Fit and setup

Who it fits, and installation

The fit, then how a system goes in

Who it fits

Good fit if, and look elsewhere if

Good fit if

  • You or your mitigator need a replacement fan in the medium-suction, lower-flow class Fantech describes.
  • Your system uses 3 or 4 inch schedule 40 PVC pipe.
  • The fan will sit outdoors or in a damp location, which Fantech rates it for.
  • You want the maker's published curve to compare against a system's measured suction.

Look elsewhere if

  • A diagnostic shows your slab needs more suction or airflow than the Rn2's curve reaches; Fantech's larger Rn models cover that.
  • You want to turn the fan down with a dial; Fantech puts a speed control only on its EC models.
  • You are designing a first system yourself; the EPA recommends a qualified mitigation contractor.
  • You need a fan listed by ENERGY STAR; Fantech names only the Rn1 and Rn2X as ENERGY STAR products in this line.

Installation

5 steps

  1. The EPA recommends that a qualified radon mitigation contractor fix a home, and notes that many states require radon professionals to be licensed, certified or registered. Fantech's manual says installation and wiring must be done by qualified persons in line with all applicable codes, and its warranty does not cover damage from improper wiring or installation.
  2. Fantech's manual says radon fans are to be installed vertically only, that the suction pipe should end at the exterior wall with a slight incline so water drains from the fan, and that the fan should not be connected directly to the building structure. It is made for 3 and 4 inch schedule 40 PVC pipe with the matching LDVI coupling.
  3. Where the fan goes matters as much as which one. The EPA's construction guide says the fan and every positively pressurized part of the vent pipe belong outside habitable space, so a leak at the housing or a joint cannot push radon into the home, and that the fan should go in a vertical run of the vent pipe.
  4. Fantech's manual also asks for guards wherever the fan is within reach or within seven feet of a working level, and says ducted fans must always vent to the outdoors. The EPA's guide says an active system needs a warning device, usually a manometer, placed where it can be seen or heard, and that the fan should never be turned off.
  5. Test once it runs. The EPA's guide says a post-mitigation radon test should be done within 30 days of installation, but no sooner than 24 hours after the system is running with the fan on, and suggests retesting at least every two years.

To find someone to design and install a system, see radon mitigation professionals, and for how a fan fits into one, how a radon fan works.

Compare

Tests that check it works

The same four rows for each, and the one difference that matters

Questions

Questions people ask

6 questions about the Fantech Rn2, answered

Asked about the Rn2

How much air does the Fantech Rn2 move?

It depends on the suction. Fantech's manual lists 160 CFM with no resistance, 150 at 0.20 inches of water column, 120 at 0.50, 80 at 1.00 and 40 at 1.50, and a maximum pressure of 1.97 inches. Its brochure gives a maximum of 174 CFM and 2.0 inches.

What pipe does the Rn2 fit?

Fantech says the Rn2 is for 3 and 4 inch schedule 40 PVC pipe, joined with its LDVI couplings, which come in 4 by 3 and 4 by 4 inch versions and are sold separately. The fan's own connection is 4 15/32 inches across.

Can the Rn2 be installed outside?

Yes, by Fantech's account: its sales sheet says the Rn2 can be mounted indoor, outdoor and in wet locations, and its manual says its radon fans were reviewed by Underwriter Laboratories and found suitable for outdoor use. The EPA's construction guide adds that the fan belongs outside the home's living space.

Does the Rn2 have a speed control?

No. Fantech puts a built-in speed controller on its Rn 2EC and Rn 4EC, and its manual for the Rn series warns against using these fans with any solid state speed control device.

Which other fans does Fantech say the Rn2 replaces?

Fantech's 2025 brochure cross-references the Rn2 to RadonAway's RP145, RP260, XP151, XP201, XR261 and GP201 and to Festa's Maverick and Hawk, based on pressure capability. It notes that pipe and connection sizes vary and may need transition couplings, and that the next larger Fantech model may be needed where a fan works at the top of its range.

Do I need a professional to install it?

The EPA recommends a qualified radon mitigation contractor, and many states require radon professionals to be licensed, certified or registered. Fantech's manual says installation and wiring must be done by qualified persons, and its warranty excludes damage from improper installation.

What to do next

Updated October 6, 2026