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.
A single-speed pump drawing 2,000 watts, operating at 3,450 rpms and generating a flow rate of 66 gallons per minute can turn over the entire 25,000 gallons of water in roughly 6.3 hours. At this rate the single-speed pump would consume 12,600 watt hours or 12.6 kWh per day, to. turn over the pool.092 watts 6 hours per day 12.6 kWh $153 per month 2092 watts 4 hours per day 8.4 kWh $102 per month 221 watts 6 hours $16 per month 221 watts 3 hours per day 0.66 kWh $8 per month cleaner (year round) 1372 watts 2.5 hours per day 3.4 kWh $42 per month (year round) 650 watts 3 hours per day 2.0 kWh $24 per month.