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Q: Can you set cfm to zero for the multi-speed module so it completely turns the fan off after 20 minutes? basically just using it as a simple timer?

No, the cfm flow setting only changes the fan speed. If you want it to shout off after a period of time then use a timer at the switch instead of a toggle. or you can buy the panasonic motion detector which will turn on the fan at motion and then it will time out ( another module to purchase). It is simplest to just jinstall an adjustable timer, - there are many to chose from .

Q: Do you have to have multi speed to use the condensation sensor?

No, the condensation sensor is a different component. I personally installed motion and the condensation sensor. It is triggered and will run for a specified period of time or until the humidity level has dropped below threshold. One cautionary note, the condensation sensor does need to be periodically cleaned along with the fan, otherwise it will run much longer than needed.

Q: can i use this module to force the fan to turn on without delay? I'm a little perturbed by the time it takes for fan to start after switching on.

No, adding this module will not cause the fan to start more immediately after the wall switch is turned on. The way the fan is designed is that the fan takes a few seconds to get started up and then build up to whatever operating speed you have selected.

Q: Does zero cfm turn it off? This and a motion sensor came on my fan. The fan is always very noisy and setting cfm to zero still keeps the fan running.

Have not adjusted this and don't know why you would want to turn it to zero which suggests the fan would be in effect turned off all the time. You might want to contact the mfgr to see if this unit is working properly. Mine turns on and off properly and is far from noisy. I also left it on a wall switch so that I can turn it off any time. For example, if I walk into the bathroom and the motion sensor kicks the fan on but I am not using any appliance and just walking out. I just flip the switch and it is off.

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Description

🌬️ Elevate your air game with smart, silent ventilation!

SMART TIME DELAY - Automatically returns fan to preset airflow after user-defined delay, balancing efficiency and comfort.
SEAMLESS INTEGRATION - Plug ’N Play module designed exclusively for WhisperGreen Select fans—no hassle, no fuss.
ASHRAE 62 2 COMPLIANT - Meets rigorous continuous ventilation standards for healthier, fresher living spaces.
ENERGY STAR CERTIFIED - Eco-friendly performance that saves energy without compromising air quality.
PRECISION AIRFLOW CONTROL - Tailor ventilation with 3 selectable speeds up to 150 CFM for optimal indoor air quality.

The Panasonic Multi-Speed Module FV-VS15VK1 upgrades WhisperGreen Select exhaust fans with customizable airflow settings (up to 150 CFM) and a user-programmable time delay. Designed for easy Plug ’N Play installation, it ensures compliance with ASHRAE 62.2 ventilation standards while delivering energy-efficient, quiet operation for healthier indoor air.

Specifications

Manufacturer	Panasonic
Part Number	FV-VS15VK1
Item Weight	1.45 ounces
Item model number	FV-VS15VK1
Is Discontinued By Manufacturer	No
Size	1.50 x 1.75 x 2.50 inches
Color	Green
Style	Panasonic FV-VS15VK1 Whisper Select-Plug and Play Multi-Speed Module
Finish	Black
Material	Plastic
Pattern	FV-VS15VK1 Whisper Select-Plug and Play Multi-Speed Module
Item Package Quantity	1
Cutting Diameter	10 Inches
Mounting Type	Plug-In Mount
Certification	Energy Star
Included Components	FV-VS15VK1
Batteries Included?	No
Batteries Required?	No
Warranty Description	Manufacture Warranty
Assembled Diameter	10 Inches