Panasonic FV-20NLF1 Inline Exhaust Fan, 240 CFM, WhisperLine Ventilation - for 6" Duct

SKU: 470502
Brand: Panasonic Model: FV-20NLF1 Condition: New

Panasonic FV-20NLF1 Inline Exhaust Fans

  • Panasonic FV-20NLF1 Inline Exhaust Fans
  • Panasonic FV-20NLF1
Regular Price: $218.25
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Nowadays, homes are built to be more airtight and enclosed, meaning more ventilation requirements for homeowners who want fresh airflow. The Panasonic FV-20NLF1 240 CFM WhisperLine Inline Ventilation Fan for a 6" Duct aims to make airflow simple by eliminating the need for multiple duct fans over several locations. With this easily installed inline fan, you can bring constant airflow to several different areas with just one unit and multiple inlets.

Two suction blower wheels make the Panasonic FV-20NLF1 240 CFM WhisperLine Inline Ventilation Fan almost noiseless as it works. By utilizing a larger, wider fan blade to move air, this high-end duct fan can move 240 cubic feet of air per minute without the constant buzz that smaller blade fans usually create.

The Panasonic FV-20NLF1 240 CFM WhisperLine Inline Ventilation Fan for a 6" Duct also allows for adjustable airflow over several different inlets, allowing you to be in total control over the ventilation to all of your sources.



• Galvanized Steel Housing for long life
• Insulated housing to prevent condensation and noise
• Tapered duct adapter for easy connection
• Super quiet/energy efficient Motor
• Totally enclosed condenser motor for long life • rated for continuous run
• Safety Motor equipped with thermal cut-off fuse
• Easy 5-position Installation
• Joist or truss attachment brackets included
• Suspension brackets included
• Grille with Low profile family design
• Adjustable airflow for multi-inlet balance


• Room Recommendations: Up to 240 Sq Ft
• Duct Diameter (inches): 6"
• Air Volume (CFM): 258 at 0.0" static pressure, 240 at 0.2" static pressure, and 200 at 0.4" static pressure
• Noise (sones): 1.4
• Power Consumption (Watts): 57
• Energy Efficiency (CFM's/Watt): 4.2
• Speed (RPM): 1260
• Current (Amps): 0.46
• Thermal Fuse Protection: Yes
• Super Quiet Operation: Yes
• Totally Enclosed Condenser Motor: Yes, for long life • Rated for continuous run
• Insulated Housing: Yes, to prevent condensation and noise
• Tapered Duct Adaptor for easy connection: Yes
• 5 Positions for Installation: Yes
• Joint or Truss Attachment Brackets Included: Yes
• Suspension Brackets Included: Yes
• Grille: Low profile family design
• Adjustable Airflow for Multi-Inlet Balance: Yes
• Galvanized Steel for Long Life: Yes
• Dimensions (L x W x H): 13 3/8" x 11" x 9 7/16"

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Questions & Answers

I want to install a new QUIET fan in our (relatively small 44 SQ FT) master bathroom in a 60yr old home. B/R has a tub/shower. Above the bathroom is an opened attic with insulation on the floor. I currently have an old, noisy, useless ceiling fan installed that has 4" flex (not-insulated) ductwork running from the fan unit to the side wall of the house..I am looking to installing an inline fan. They seem to be the quietest around. I am looking at the PANASONIC unit which is rated at 120CFM which I know SHOULD be plenty. I was also considering this larger 240CFM unit.I know it would SEEM that the 120 would be plenty big and the 240 would be way too big which leads to my question.Is there any problem with using a too large unit (other than it costs more and uses more power)? Will it be too strong so as to not work properly like getting a central A/C unit that is too big?Part of the reason I am considering the larger (240cfm) unit is because I will be using 4" or 6" insulated flexible duct (depending on which size unit I choose). The run isn't too long (maybe 25 feet total) but there are a number of unavoidable twists and turns to get to the inline fan from the bathroom ceiling and from the inline fan to the outside wall. There is at least 1 unavoidable close to 180 degree turn and 2 x 90 degree turns. From everything I have been reading the flex duct itself and the turns greatly increase the static pressure and reduce the efficiency of the fan requiring a more powerful fan.With this situation should I go with the 120CFM or the 240CFM. Cost and power use not withstanding and taking into consideration I have no other option in mounting location of the fan unit so the direction of the ducting can't be changed.Thank you!

by Ed Feins from NJ on 10-22-2012

For this application, you could loose anywhere from 10-30% efficiency (if not more) from the fan as a result of your ducting situation. The 240 CFM would be needed to adequately vent the bathroom to your specifications. However, the noise level will be slightly increased due to the amount of air being moved, and the friction in the duct.

on 10-23-2012
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