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Spa Circulation Pump?


Most circulation pumps are rated at around .4 hp to .5 hp this equates to (746w = 1HP) 298 Watts to 373 Watts.

  

This means that if you run one for 24 Hours it will use 7.15 KW Hours to 8.95 KW Hours

 

At the current cost of electricity of about 11 cents per unit the cost per day is 79c to 99c. This means the total cost per year is $288 to $361

 

Artesian Spas use a smaller more efficient pump 87W only using only 2KW Hours per day or 22c per day and $79 for a Whole Year.

 

Do I need a circulation pump?

 

Spas engineers have for years been using a two speed pump as an alternative to a circulation pump.

 

Reasons:

Just as quiet as a circulation pump

One pump less to break down

The pump works on the whole system thus better cleaning

 

How much filtration is necessary 3 to 4 hours per day is the recommended amount so if we use a half speed pump what does it cost us;

 

A 2.5 HP pump run at half speed will consume 923Watts x 4 hours = 3.73 KW Hours as you can see that is around a half of what the normal circulation pumps consumes saving you about a $150 per year. Is there any advantages for using a circulation pump?

In reality no unless you use the 87W variety

 

Pump

Rated  Watts

KWH per day

KWH per Year

Cost

Day /Year

Circ Pump .4 HP

298

7.15

2610

79c / $288

Circ Pump .5 Hp

373

8.95

3266

99c / $361

87W Laing pump

87

2

730

22c / $79

Half speed 2.5 HP

932

3.78

1379

41c / $ 151



 

Other issues:

 

Noise Circulation pumps are reasonably quiet but as with any constant noise it is annoying and it is on all the time. Bear in mind that as pumps age they become more noisy The Laing Pump almost silent

 

The half speed pump you can set to run only during daylight hours