What is the sound (scone) level of this fan?

I believe it operates at .9 @110cfm .6 @80 cfm .4 @50cfm. It's advertised as <.3 scone which is true if measured off of the start up speed. Since it is a DC motor it has what would be noticed as a slow start but that is totally normal. They have a larger unit also that has a light with a 6" exhaust and it tops out at 150cfm and it is maybe a little above 1 scone at full speed. These are in opinion hands down the best residential bathroom/utility room exhaust fans. I don't even offer anything else to my customers. You won't be disappointed.

What is the duct size please?

It is 4 in oval so it can fit into 2 by 4 walls. I used this to immediately go to the outside. Fantech 4 inch Round to Oval Duct Elbow FEL 4 https://www.amazon.com/dp/B004HE1A7C/ref=cm_sw_r_cp_apip_ZR9i4rM5GZFhA

Can this fan be installed from below, or do you need to access from above ceiling?

Yes. If you can get the knockout out and enough vent tube down. Not your hole will need to be about 1/2” bigger than the fan to accomplish this and you will need to be in a stub/joist

The fan turns on but its not a constant speed/whir and it oscillates between on and off - is that how its supposed to work?

You've probably solved your problem by now, but for future purchasers reading these questions, this issue appears to be caused by certain timers that are not compatible with the unit. It should operate at constant speed. Mine shows up today so haven't tested yet, but I read that the Legrand RT2WCCV4 timer works fine.

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Q: What is the duct size please?

It is 4 in oval so it can fit into 2 by 4 walls. I used this to immediately go to the outside. Fantech 4 inch Round to Oval Duct Elbow FEL 4 https://www.amazon.com/dp/B004HE1A7C/ref=cm_sw_r_cp_apip_ZR9i4rM5GZFhA

Q: Can this fan be installed from below, or do you need to access from above ceiling?

Yes. If you can get the knockout out and enough vent tube down. Not your hole will need to be about 1/2” bigger than the fan to accomplish this and you will need to be in a stub/joist

Q: The fan turns on but its not a constant speed/whir and it oscillates between on and off - is that how its supposed to work?

You've probably solved your problem by now, but for future purchasers reading these questions, this issue appears to be caused by certain timers that are not compatible with the unit. It should operate at constant speed. Mine shows up today so haven't tested yet, but I read that the Legrand RT2WCCV4 timer works fine.

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💨 Elevate your air game with whisper-quiet, smart ventilation!

CUSTOM COMFORT CONTROL - Pick-A-Flow selector lets you choose between 50, 80, or 110 CFM with a simple switch flip.
ADAPTIVE AIRFLOW MASTERY - SmartFlow tech auto-adjusts fan speed for perfect ventilation no matter the duct complexity.
WHISPER QUIET EFFICIENCY - Operates at just 0.9 sones, ensuring your bathroom stays peaceful and fresh without noise intrusion.
SLEEK FLEXIBLE INSTALLATION - Slim profile and unique L-shaped bracket enable easy ceiling or wall mounting, fitting tight spaces effortlessly.
ENERGY STAR CERTIFIED LONGEVITY - Runs cooler and uses less power (11.1W), extending motor life while saving on energy bills.

The Panasonic WhisperValue FV-0510VS1 is a modern, energy-efficient bathroom exhaust fan featuring an intelligent ECM motor with SmartFlow technology for optimal airflow between 50-110 CFM. Its ultra-quiet 0.9 sones operation and versatile ceiling or wall mount design make it ideal for residential and multifamily homes. Equipped with a user-friendly Pick-A-Flow speed selector and an innovative L-shaped bracket, it ensures easy installation and long-lasting performance while meeting ENERGY STAR standards.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Brand	Panasonic
Colour	White
Electric fan design	Exhaust Fan
Power Source	Corded Electric
Style	Modern
Room Type	Bathroom
Special Feature	Portable
Noise Level	0.9 Sones
Wattage	11.1 Watts
Blade Length	7.09 Inches
Voltage	120 Volts
Switch Type	Push Button
Item Weight	6.8 Pounds
Model Name	WhisperValue
Specification Met	energy star rated
Manufacturer	Panasonic
UPC	885170306295
Global Trade Identification Number	00885170306295
Item model number	FV-0510VS1
ASIN	B06W2LB17J

Panasonic WhisperValue Ceiling/Wall Mount Bathroom Exhaust Fan, 50-80-100 CFM, FV-0510VS1

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