Archive for: January, 2011

Using 163 Light Bulbs?

Jan 20 2011 Published by under American Consumer, Changing scene, Geek stuff

Do you have 163 60 watt light bulbs on for several hours a day.  Will if you are running a single speed 2 horse power pool pump, that is how many 60 watt light bulbs you have on each and every hour the pump is on.


The average 2HP single speed pool pump uses 2000 watts per hour. Most people run there pump atlease 3 hours a day, most likely 6 to 8 in the summer.  So for the average summer month you are spending $50 to $60 a month, based on Southern California rates. It could be costing you more as you move up to a higher rate tier when you consume more electricity in the summer.

How does this happen. Back in the 70′s and 80′s pool pump horse power was king. The pool salesman would upgrade you to a better, higher, horse power for the same cost and you though you were getting a better deal. More power, ya!

So,  do you really need all that horse power to jam the water through a pool pump and filer. NO, you do not. So the pool industry came out with a two speed pump to save you money on electricity.  One speed to clean your pool and get that pool sweep running. With a slower speed to circulate the water and get your turn rate. Did it save money?  You bet!  But now there is even something better.

The Pool industry has a variable speed pump. The pump can be programed to run at almost any speed you want. And here is the dirty little secrete! As you decrease the pump speed, by reducing the revolutions per minute (RPMs),  the pump gets more efficient and uses LESS ELECTRICITY. Are you with me?

The normal pool pump runs at or above 3200 RPM, that will use 2000 watts or more of electricity per hour. A variable speed pump can be run at 1100 RPMs and only use 156 watts or less per hour. Sometime 145 watts.  BUT BUT what about my water turn rate, will it turn over in 6 hours? NO, so you run the pump longer. BUT that use more electricity, right? NO, not  at the lower RPMs.

If you run your single speed pump for 6 hours, that 12,000 watts of electricity.  If you triple your run time to 18 hours with the variable speed pump you will only use 2,772 watts of electricity. That is less then what one and one half hours of the single speed pumps electricity usage.

So what about the pool sweep it will not run at that low flow rate. So you program the variable speed pump to ramp up to maybe 2000RPM and use anothe 1000 watts of electricity to keep the pool clean. Onky for an hour or so. Your still way under 12,000 watts of power.

So save some money and get a variable speed pump. Do they cost more? Ya a lot more.  But you just missed a Southern California Edison rebate program that paid you $300 to install a variable speed pump. I’m sure there will be more incentives. Just keep your eye open. Once you get a variable speed pump you will only be using 2.5 60 watt bulbs per hour not 163. And that save you money and is good for the environment.

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