I have those two, 240V heaters installed. I decided to go with the models that can either produce 3000W or 6000W. I doubt I will ever use the high setting, but time will tell. Perhaps only using the low setting will extend the life of these heaters. I am leaving one of the 120V, 1500W heaters (one in each greenhouse) on their own dedicated thermostat and they are on another electrical panel. Those will be my backups just in case the 240V trips a breaker or for some other reason, don't heat. I hope the 240V will be more efficient and perhaps use less electricity. These heaters, and running those 240V dedicated lines, were not an inexpensive venture.
