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Old 09-20-2016, 10:15 PM   #1
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Default Panasonic Whisper Quiet exhaust fans

Anyone wire one of these? It is supposed to run at a low CFM all the time then with a second switch it kicks onto high. The instructions state that the red wires are NOT low voltage, but they are only 24 gauge. If you look at the diagram one comes from the neutral. Can this be wired with a 3 conductor cable by tying into the neutral at the switch box and sending it up on the extra conductor in the 3 wire cable, tying it to the red control wire?

We roughed it in with a 2 wire and a 3 wire Romex. The HVAC installer took our 2 wire out and threw it away saying we only need the 3 wire. Then he got fired before we came to trim.

Makes no sense to me to install a ventilation fan that is supposed to run 24/7 for the new building codes then give the option of switching it off.
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Old 09-20-2016, 10:46 PM   #2
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The description, if you read Japanglish properly, is telling you that the red wires are essentially a very low voltage logic level signal for the electronics (Multi-speed Module) rather than either direct power control or even coil current of a relay (i.e. 24VAC).
You can still turn the fan off or disconnect it for maintenance with the on/off switch, but normally that switch would be left on.
Some fans control whether to even run the low speed by using an internal humidity sensor.
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Old 09-20-2016, 11:12 PM   #3
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Originally Posted by inetdog View Post
The description, if you read Japanglish properly, is telling you that the red wires are essentially a very low voltage logic level signal for the electronics (Multi-speed Module) rather than either direct power control or even coil current of a relay (i.e. 24VAC).
You can still turn the fan off or disconnect it for maintenance with the on/off switch, but normally that switch would be left on.
Some fans control whether to even run the low speed by using an internal humidity sensor.
Yes this model can be fitted with "plug n play" modules, one of which is a humidity sensor.

So I suspect that while it may work with a 3 conductor cable it will be in violation for the different voltages in the same cable/box. However interconnected smoke alarms are wired this way so maybe not.
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Old 09-20-2016, 11:26 PM   #4
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Without the control switch the fan will still work,
it will be only one speed thou.
My guess is it will run on low speed
the control probably changes it to high speed.
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Old 09-20-2016, 11:30 PM   #5
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Originally Posted by dmxtothemax View Post
Without the control switch the fan will still work,
it will be only one speed thou.
My guess is it will run on low speed
the control probably changes it to high speed.

Yes that's how it works. Low is only 30 CFM though
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Old 09-20-2016, 11:33 PM   #6
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Originally Posted by Joefixit2 View Post
Yes this model can be fitted with "plug n play" modules, one of which is a humidity sensor.

So I suspect that while it may work with a 3 conductor cable it will be in violation for the different voltages in the same cable/box. However interconnected smoke alarms are wired this way so maybe not.
If that is how it was designed, manufacturers specs are what the AHJ will look at normally.
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Old 09-21-2016, 12:49 AM   #7
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I always tell customers who insist on picking up their own fart fans to get the ones that are just fart fans and no other bells and whistles. So one guy, I just know he is going to pick up ''bells and whistles'' and sure enough not only am I fishing two 14-3 cables for the voltage stuff, but a cat-5 cable to a volume control so you can drown out ''sounds'' by bluetooth linking to your I-tunes library on your phone ...............................
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Old 09-21-2016, 04:06 AM   #8
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more work = more money ?
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Old 09-21-2016, 04:25 AM   #9
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more work = more money ?

Yea but sometimes when you are busy as hell with lots of other sqawking customers you don't really want to ''do extra work''. Still yet- Charge Large.
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Old 09-21-2016, 07:14 AM   #10
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I'm buying a bells and whistles. Panasonic with fan, heater, light, and night light.
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Old 09-21-2016, 07:24 AM   #11
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I'm buying a bells and whistles. Panasonic with fan, heater, light, and night light.
No surround sound ????

Built in camera ??
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Old 09-21-2016, 07:44 AM   #12
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Quote:
Originally Posted by Joefixit2 View Post
Anyone wire one of these? It is supposed to run at a low CFM all the time then with a second switch it kicks onto high. The instructions state that the red wires are NOT low voltage, but they are only 24 gauge. If you look at the diagram one comes from the neutral. Can this be wired with a 3 conductor cable by tying into the neutral at the switch box and sending it up on the extra conductor in the 3 wire cable, tying it to the red control wire?

We roughed it in with a 2 wire and a 3 wire Romex. The HVAC installer took our 2 wire out and threw it away saying we only need the 3 wire. Then he got fired before we came to trim.

Makes no sense to me to install a ventilation fan that is supposed to run 24/7 for the new building codes then give the option of switching it off.
I have that fan in my house.
They both have the occupancy sensor trim. I would suggest that.
Also, a nice feature is the night light.
Another is humidity control.
All of that is done in the the grill you pick out.
This is what I did.

In the master bath, I connected the fan to a switchleg and that's it.
I leave the switch on 24/7, it has a very low speed and I picked out the occupancy sensor grill. They have a cfm and run time selector switch.

The second bath is hard wired. Runs low 24/7 and turns on at a preset cfm when someone enters. The runtime is selected to allow you to preset how long the fan runs after someone leaves the room.
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Old 09-21-2016, 10:05 AM   #13
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No surround sound ????

Built in camera ??
I considered it but you have to draw a line somewhere.
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Old 09-21-2016, 08:14 PM   #14
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I put one of the high end ones up without any modules and they didn't like it saying it was too quiet and didn't work. I ended up putting in an ac motor from a similar model and they were happy. I wonder if I didn't connect something in the dc one and it spun too slowly or was supposed to ramp up.
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Old 09-21-2016, 08:23 PM   #15
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I have one of the newer ones that takes the modules (none installed) and a led light and (3) settings for different cfms. They do ramp up to speed and have a slight delay in starting. The first one I did it threw me for a loop as I thought it was a bad unit until it started after I turned it on and off a couple of times.
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Old 09-21-2016, 08:23 PM   #16
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I do like mine though
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Old 09-21-2016, 08:46 PM   #17
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This one had delay in starting, but didn't seem to ramp up, so maybe that was the problem. I like them in general. I like the new bracket for old work.
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Old 09-21-2016, 08:47 PM   #18
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I like the bluetooth ones...
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Old 09-21-2016, 10:22 PM   #19
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Maybe this should be a new thread cuz it's kinda of tangent but:
Recently put in a HO supplied Broan fan with built in Humidistat.
Manual said there's a special/optional switch. Don't remember
what the switch was for. Regardless, the HO's didn't buy/supply
the optional switch so I wired as the manual indicated it be wired
when used with a regular switch. When I did the finishing the
fan didn't turn on with the switch. Found by accident that turning
it on-off-on made it come on every time. Fortunately the HO still
had the manual and I was able to find in the manual that that's it's
designed operation. When in the on position, it operates based on
the humidistat. To override this and have the fan run for 20 mins,
on-off-on is required.
This seems easy for the people that live there. Kind of a pain to
explain to everybody who comes to visit.
Bottom line is that these special option fans are a pain. Charged the
HO's for some, but not all, of my extra time.
P&L
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