Here is what I sorted to have the kitchen fan speed set according to power use on the induction cooktop, with 1:30 seconds of max speed to pop the exhaust hood ball. I'm using an insulated Broan Ecovent for the outside hood. This hood has a foam ball which falls back into an insulated bowl to seal up the vent when not on use. That ball can become slightly frozen in place in very cold weather, hence the 1:30 time with the fan going at 100%. The extra pressure pops the ball out...otherwise there is no venting!
1st I needed to figure out a relationship between induction power and dimmer settings. I did that here: Slope Calculator
I figured when the induction cooktop is at 250 watts, I want the fan at 40% and with power at 4000 watts, the fan should ramp to 99%. Plug those numbers into the graphing web site above and you get "Dimmer Setting" = 0.0157 * (Induction Power in watts) + 36. The equation I'm using in the 3rd pic here is actually Dimmer Setting = 0.02 * (induction power in watts) + 34
Turns fan on with cook top use and sets it to full power for 1:30 seconds, then ramps it down to 50%. At this point, the speed will be set dynamically every time power use changes on the cooktop.
Modifies the kitchen fan speed every time power level on induction cooktop changes...but not until it runs at full power for 1:30 minutes. I set a variable, then do some math on it to arrive at the "correct" dimmer setting for the fan.
