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Description
The Panasonic FV-VS43R 4" Oval to 3" Duct Adaptor is a genuine Panasonic ventilation accessory designed to provide added flexibility during installation of compatible Panasonic WhisperValue bathroom fans and fan/light combinations. This adaptor converts a 4" oval duct connection to a 3" round duct connection, making it a practical solution for renovation work, tighter duct layouts, and installations where a 3-inch round duct path is preferred.

As an Authorized Panasonic Distributor in Canada, MARS Lighting & Electrical Distribution (MARS LED) supplies genuine Panasonic bathroom fan accessories and ventilation products to contractors, electricians, builders and homeowners across Ontario, British Columbia, Alberta, Saskatchewan, Manitoba, Quebec, Atlantic Canada, and the Territories, with fast Canada-wide shipping.
Key Features – Panasonic FV-VS43R Duct Adaptor
- Converts 4" oval to 3" round for more flexible duct routing
- Designed for Panasonic WhisperValue models and compatible fan/light combinations
- Genuine Panasonic accessory for reliable fit and installation compatibility
- 24-gauge steel construction for durability
- Fire-code rated adaptor for compliant installation applications
- Helpful for bathroom fan retrofits and duct layout constraints
- Ideal when adapting a compatible Panasonic fan to 3" round ducting
- Useful in renovation, multi-family, residential, and light commercial applications
- Supports cleaner transitions where space or duct runs make standard connections difficult
- Fan sold separately
Ideal Applications
- WhisperValue fan installations requiring a 4" oval to 3" round duct transition
- Bathroom exhaust fan retrofit and renovation projects
- Residential and light commercial ventilation layouts
- Tight ceiling or wall duct runs where a 3-inch round connection is preferred
- Replacement or accessory add-on for compatible Panasonic WhisperValue fan models
Technical Specifications – Model FV-VS43R
| Model | FV-VS43R |
| Product Type | Duct Adaptor / Transition Fitting |
| Duct Size Conversion | 4" oval to 3" round |
| Material | 24-gauge steel |
| Rating | Fire-code rated |
| Compatible Product Family | Panasonic WhisperValue fan and fan/light combinations |
| Application | Residential, multi-family, renovation/remodeling, light commercial |
| Installation Context | For compatible ceiling and wall-mount WhisperValue ventilation applications |
| UPC | 885170136540 |
| Brand | Panasonic |
Product Resources & Downloads
Reference official Panasonic product information for the FV-VS43R duct adaptor:
Compatible Panasonic WhisperValue Applications
| Accessory | Best For | Connection Type | Notes |
|---|---|---|---|
| FV-VS43R (this model) | WhisperValue fan installs needing a duct transition | 4" oval to 3" round | Designed exclusively for compatible WhisperValue fan and fan/light combinations |
| Standard WhisperValue connection | Direct installation without adaptor | 4" oval | Used where duct layout already matches the fan outlet |
Explore More Panasonic Bathroom Ventilation Products
- Panasonic Whisper Quiet Brand Page
- All Panasonic Bathroom Ventilation Fans in Canada
- Panasonic WhisperValue Bathroom Fans
- Panasonic WhisperCeiling Bathroom Fans – Canada
- Shipping & Delivery Information
Why Buy Panasonic Ventilation Accessories from MARS LED?
- Authorized Panasonic distributor in Canada
- Genuine Panasonic accessories only
- Fast Canada-wide shipping
- Reliable support for contractors, builders, and renovation projects
- Easy product pairing with Panasonic WhisperValue bathroom fans
Canada-Wide Shipping
We ship the Panasonic FV-VS43R duct adaptor across Canada, including Ontario, Quebec, British Columbia, Alberta, Saskatchewan, Manitoba, Atlantic Canada, and the Territories.
Frequently Asked Questions – Panasonic FV-VS43R
What is the Panasonic FV-VS43R used for?
The Panasonic FV-VS43R is a genuine duct adaptor used to convert a 4" oval duct connection to a 3" round duct connection for compatible Panasonic WhisperValue bathroom fan and fan/light combinations.
Is the FV-VS43R a bathroom fan?
No. The FV-VS43R is not a fan. It is a Panasonic bathroom fan accessory designed to help adapt duct connections during installation.
Which Panasonic fans is this adaptor compatible with?
This adaptor is designed for compatible Panasonic WhisperValue fan and fan/light models. e.g. FV-0510VS1 . Always confirm model compatibility before purchase if you are matching it to an existing unit.
What duct sizes does this adaptor connect?
The adaptor converts a 4-inch oval connection to a 3-inch round connection, making it useful for renovation and retrofit applications where duct layout flexibility is needed.
Is this a genuine Panasonic part?
Yes. The FV-VS43R is a genuine Panasonic ventilation accessory supplied by MARS LED as an authorized Panasonic distributor in Canada.
Do you ship the Panasonic FV-VS43R across Canada?
Yes. We ship the Panasonic FV-VS43R duct adaptor across Canada, including Ontario, Quebec, British Columbia, Alberta, Saskatchewan, Manitoba, Atlantic Canada, and the Territories.
Looking for a Panasonic 4" to 3" Duct Adaptor in Canada?
Customers often find this product while searching for “Panasonic FV-VS43R”, “Panasonic 4 inch to 3 inch duct adaptor”, “WhisperValue duct adapter Canada”, “4" oval to 3" round duct adaptor”, or “Panasonic bathroom fan duct adaptor Canada”. If you need a genuine Panasonic transition fitting for a compatible WhisperValue fan installation, the FV-VS43R is the correct accessory for added duct layout flexibility.
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