Hence the relatively small projected sea level rise by the year 2100, as compared to the changes measured in tens of meters that occurred in Earth's history (see Introduction). The rise by 2100 is only a small beginning of a much larger, multi-century response of ocean and ice sheets to elevated global temperatures.
Single Speed Pool Pumps: Runs at a single speed, 3450 rpm (revolutions per minute). Imagine if your car ran at 3450 rpm - all the time, and how much gas you would use! Dual Speed Pool Pumps: Have a fourth wire coming into the pump, the low speed wire. This allows you to run the pump on low speed for 8-16 hrs per day, and high speed for 4-8 hrs. Variable Speed Pool Pumps: Operates at many speeds, programmable and self-optimizing for the highest energy efficiency and greatest energy savings.
14 Years and still going strong. I built my pool in 2000 and put in a 2 HP 2 speed Wisperflow. It is still going strong July 2014. I have 30,000 Gal pool. I run the pump 99 % on low speed.I have an Energy SMART power saver hooked up to low speed. It cut the current from 3.3 amps to 3.0 amps.he Hayward pool pump died about 14 months afterwards. The new one has lasted about 3 years and I suspect it is in big trouble. It is making very loud noises and now it won't start. I will be bringing it in tomorrow.