The wiring could then be where the black wire of the 12 2 could be for the heater function which would be controlled by the timer switch and the 12 3 could be wired so the black wire is for the light and the red wire is for the exhaust fan.
Fan heater light wiring.
One switch is for the exhaust fan one switch for the ceiling fan light and one switch for the light over the vanity.
This is a 4 function switch.
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This switch will operate a fan heater and either light or night light.
For what you are asking you need a 3 function switch.
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Broan nutone qtx110hl very quiet ceiling heater fan and light combo for bathroom and home 0 9 sones 1500 watt heater 60 watt incandescent light 110 cfm white 4 2 out of 5 stars 220 265 00 265.
These three in one fixtures work best when wired to a three function switch box allowing for individual control of the unit s functions from a single point.
Broan nutone qt series very quiet 110 cfm ceiling bathroom exhaust fan with heater light and night light model qtx110hflt 325 99 325 99.
Broan nutone ceiling bathroom exhaust fan infrared heater 70 cfm 250 watt model 162 44 30 44.
There is a dial switch for the heater.
On the bathroom wall there are three wall switches.
In the attic there were two wire cable feeds.
As a result these combo units can be complicated to install.
Model 765hl page 4 operation before using heater make sure heater has been properly installed according to installation steps beginning with the typical in stallation section on page 1.
One cable is for the existing heater and the other is for the light and fan.
Use a 3 function control to operate the heater fan and light.
An electrician deactivates the electrical circuit before you start the job.