What are the dimensions of this fan?

Outer grate 13" x 13" Recessed guts: 10.25" x 10.25"/ 5.625" high

What is it about this kit that makes it preferable for retrofitting versus new builds?

This is good for both new and remodel construction. (Existing replacement) The fan is bigger than most fans that are being replaced so there isn’t need for drywall patches/paint. The flexible bracket makes it extremely easy. If you have basic tools, a little experience with remodel work and take your time you won’t need to go into attic at all, or if you use the slim low profile version it can be done in between upstairs and downstairs situations. I’ve installed over 200 Panasonic exhaust fans as a professional electrician over the years. They are one of the only exhaust fan brands that I can honestly recommend. Hands down the quietest as well. There is a reason they cost more than the builder grade $15 Broan fans that come in most houses.

The product description says "dc". does that mean it will or won't run off of standard 120v ac current?

These fans run on normal US 120v … The “ DC” motor is powered internally once you supply 120v AC power and is better quality & makes it quieter. Hope this helps …

does this have a 30 day return window? Not sure it will be right and installer not doing for 10 days

Mine worked, didn't worry about 90days

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Panasonic FV-0511VF1 WhisperFit DC Retrofit Ventilation Fan, 50, 80 or 110 CFM, Quiet Energy Star Certified Energy-Saving Ceiling

Panasonic FV-0511VF1 WhisperFit DC Retrofit Ventilation Fan, 50, 80 or 110 CFM, Quiet Energy Star Certified Energy-Saving Ceiling

Product ID: 460542685

Details

Brand
Panasonic
Colour
White
Controller type
Switch
Electric fan design
Exhaust Fan
Mounting type
Ceiling Mount
Power source
Hardwired

⚡Energy Star certified, 15W power

💨3 airflow settings (50/80/110 CFM)

🔇Ultra-quiet 0.8 sones noise level

451446CFA

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Description

💨 Upgrade to whisper-quiet, energy-smart airflow—because your bathroom deserves the best.

CODE READY COMPLIANCE - Built to meet ASHRAE 62.2, LEED, IAP, and California Title 24 standards—future-proof your home’s ventilation.
ENERGY SAVING ECM MOTOR - Brushless DC motor delivers powerful ventilation with minimal energy consumption—eco-friendly and cost-effective.
WHISPER QUIET PERFORMANCE - Operate in near silence at just 0.8 sones—because peace matters in your sanctuary.
CUSTOMIZABLE AIRFLOW CONTROL - Pick your perfect ventilation with 3 precise CFM settings for tailored comfort.
EFFORTLESS RETROFIT INSTALLATION - Innovative Flex-Z Fast bracket and slide-in design make upgrades a breeze, no attic access needed.

The Panasonic FV-0511VF1 WhisperFit DC Retrofit Ventilation Fan offers customizable airflow options (50, 80, or 110 CFM) powered by an energy-efficient brushless DC motor. Its ultra-quiet operation at 0.8 sones and innovative Flex-Z Fast bracket enable easy retrofit installation from below the ceiling, fitting tight spaces with a low-profile 5-5/8" housing. Energy Star certified and compliant with major ventilation codes, this fan combines performance, efficiency, and convenience for modern bathroom ventilation needs.

Specifications

ASIN	B0973N9G21
Air Flow Capacity	110 Cubic Feet Per Minute
Blade Length	4 Inches
Blade Material	Plastic
Brand	Panasonic
Brand Name	Panasonic
Collection Name	Bathroom
Color	White
Colour	White
Control Method	Touch
Controller Type	Switch
Customer Reviews	4.6 out of 5 stars 1,483 Reviews
Electric Fan Design	Exhaust Fan
Electric fan design	Exhaust Fan
Finish Type	Powder Coated
Included Components	Cord
Indoor Outdoor Usage	Indoor
Installation Type	hardwired ceiling mount
Is Product Cordless	No
Item Dimensions D x W x H	33D x 33W x 14.2H centimeters
Item Type Name	Ventilation Fan
Item Weight	9.35 Pounds
Main Power Connector Type	NEMA 5-15 plug
Manufacturer	Panasonic
Material	Other
Model Name	WhisperFit DC
Model Number	FV-0511VF1
Motor Type	Brushless DC Motor
Mounting Type	Ceiling Mount
Noise Level	0.8 Sones
Number of Blades	5
Number of Power Levels	3
Number of Speeds	3
Part Number	FV-0511VF1
Power Source	Hardwired
Power source	Hardwired
Product dimensions	33D x 33W x 14.2H centimeters
Recommended Uses For Product	Ventilating
Room Type	Bathroom
Size	Large
Special Features	Manual
Specification Met	Energy Star, UL
Speed	3 RPM
Standby Power Shutoff	High
Style	Modern
Switch Type	airflow selector switch
UPC	885170375468
Unit Count	1 Count
Voltage	120 Volts
Wattage	15 watts

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