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.
I like to run pools with the minimum amount of pool pump run time as possible. It only takes a little experimentation. This will require a pool pump timeclock-don't' rely on your memory to turn a pool pump on and off each day, you are bound to forget. Begin at 12 hours of filter run time per day.sing a 2 speed pool pump will save money, no doubt-even more if you run it only 12-18 hours per day total. Typically the lower speed is 1/8 hp, and consumes only a very small amount of amperage. Experimentation is key here also-perhaps 4-8 hours on high speed and 8-12 hours on low speed, with seasonal adjustments.