I have 13 ft at home and eyehooks set at 5 foot, though they should be a tad higher. Since January 18, 2011. It is fantastic in the summer time. I set a fan in front of my air conditioner vent and shoot the air right across the bottom of my hammock. Last year the room would be in the 80's but I was cool and comfy in my hammock. This year it's not such an issue as we insulated last year and for the first time in over 20 years it's over 90 outside and whatever I set the air conditioner at inside. Shoot, it even shuts off from time to time. But to keep the wife happy and warm I set the temps up a little higher at night and use the fan trick to keep me from being a sweaty mess.