Overall this all-in-one is a good value, but Samsung missed a huge opportunity for additional power savings. This unit goes into power saving mode after one minute by default, which is fine. The problem is that the unit "wakes up" the entire system, including the power hungry fuser heaters, whenever anything happens, including outgoing faxes, scanning, or the phone just rings. I can *maybe* see anticipating an incoming fax, but certainly not for scanning or outgoing faxes.
How do I know the fuser heaters are activating? The lights in my office literally dim, there is such a power surge. This is so annoying I have resorted to unplugging the telephone line from this device when I am not actively faxing.
The better approach would be for Samsung to only "wake up" the portions of this unit that make sense for the immediate work to be done. Keeping the fuser heaters off until something is actually going to print would be prudent and "green".