WOW, can't believe I got such a great deal on a beautifully manufactured unit.  I've been admiring these for some time and finally found a great deal.  Purchased the 36 inch unit and it's the perfect size.  When the flame (3 settings: orange, orange/blue, blue) runs there is no sound. Very quiet.  When the heater runs ( 2 setting, low and hot) there is a gentle motor humming.  Nothing annoying.  The "hot" setting gets very hot which is why the directions says not to install anything on top of it.  It would definitely melt or cause damage.  Going to be great for those cold winter days.  The Unit comes with a hanging bar for installation and is about 4.5 inches from the wall.  There are air intake vents on the side of the unit when the heater is turned on so there is no opportunity to install anything decorative around or on top of this unit.  All in all, very nice wall mounted fireplace that will look great anywhere.  Very happy with purchase