I was a little concerned about this heater after reading some of the reviews, but decided I'd give it a try. Glad I did as it has proven to be a outstanding little heater for my 6x4x8 greenhouse. Normally, we only have a few days in the winter where temps drop into the 20s (F) for a week or so. This
year we dropped down to 9.5F a record low. I was concerned for my greenhouse plants, but this heater which was only set on 750w kept the greenhouse at 30.5F which while below freezing was well above what I needed for my over-wintering semi-perennials (which can tolerate down to 25F for a short period). I increased the setting to 1500w and the heater then kept the greenhouse at a steady 65F - outstanding performance for the price; especially considering the environment and the record low outside temperatures. It might have exceeded 65F, but I was using my z-wave home automation system with a temperature sensor to turn the heater on and off remotely to keep the temperatures between 40F and 65F. If you need a small 750/1500w electric heater for your shop, garage, or greenhouse I highly recommend this one.
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