Actually, the usual block heater is 400W. Yes, you can get 750, not sure of the part number. I wouldn't recommend 1000W. Besides fit issues, I would worry about boiling coolant right at the heater.PlantDrive wrote:A block heater is often 750W or 1000W. So if you are where it gets really cold in winter and you want to plug in and not have it running too long (on a timer, save hydro), then use one of those.
You can only heat so much before the warmed up block will be radiating 400W of energy to the surrounding -20 air, and your coolant and block won't get any warmer.