Brew Heat Pad 25w

Using for the first time in my garage early in November (in chilly Bend OR). I have my fermenter sitting on top of my fermentation chamber (AKA chest freezer), resting on my Brew Heat Pad, which is plugged into my Temp Controller. I've taped the Temp Controller probe to the side of the fermenter. I've insulated the fermenter with a thick towel, leaving only the airlock exposed. My Tilt inside the fermenter reading is within 1 degree F of my Temp Controller. Fantastic!