I am wanting to replace my light/vent combo in my bathroom to a
light/vent/heater combo. My curent switch runs the light and vent at
the same time.
How would I wire the new heater cobo? Will I have to run a new circuit
or can I just use the existing wire?
You can use the existing wire *IF* you are willing to have the
fan and light and heater all come on at the same time *every* time.
But...I would look closely at the heater rating and see if the
wire size is adequate. You'd have to calculate what other loads
are already on that circuit too.
Doesn't sound practical to me...
Most Heat/Vent/Light units are 1200-1500 watt heaters and the manufacturers
state "Use on dedicated circuit only."
If you're gonna go through with this, now would be a good time to bring in 2
-20a circuits, 1 for the heater and the other for a new 20a bathroom GFCI
H-V-L units (w/o the "night light") require a 2-wire cable and a 3-wire cable
to have seperate switches for each function.
I used a 12/2 for the heater on a spring-wound "Broan" timer, on it's own
circuit, and a 14/3 from a local lighting circuit for the light & fan. The fan
is also on a timer, and the light comes on with the vanity lights.
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