Nine (maybe?) year-old Hayward Superpump impeller has seized (I managed to free it last year but no luck this year). Exploring VS (Pentair SuperFlo VS) versus replacement of Hayward 1 HP single-speed pump. Would some kind soul with more expertise than I have please help me to ensure my calculations (below) make sense?
Difference in cost between units with install and tax: $713
No rebate from utility company for VS pump.
Off-peak electricity rate including distribution: $0.103/KWh (off-peak period is 12 hours per day, fixed charges not included)
Pool runs for maximum 150 days per year.
Note: KWh for Pentair taken from calculator from their web site for the duration specified at a flow rate of 36 GPM
Not sure about dynamic head loss for pool.
Supplier quoted typical life of Pentair as between "3 and 12 years," which is not overly helpful given the variability. I'm hesitant to spend the extra $ without a decent guarantee that the pump would last long enough to recoup the difference.
Thanks in advance for any thoughts.
Mark
Difference in cost between units with install and tax: $713
No rebate from utility company for VS pump.
Off-peak electricity rate including distribution: $0.103/KWh (off-peak period is 12 hours per day, fixed charges not included)
Pool runs for maximum 150 days per year.
Note: KWh for Pentair taken from calculator from their web site for the duration specified at a flow rate of 36 GPM
Not sure about dynamic head loss for pool.
Hayward | Pentair | ||
KW | 1.54 | 0.37 | |
Hours per day | 10 | 12 | |
Cost per day | $1.59 | $0.46 | |
Difference per day | $1.13 | ||
Days to break even | 631 | ||
Seasons to break even | 4.2 |
Supplier quoted typical life of Pentair as between "3 and 12 years," which is not overly helpful given the variability. I'm hesitant to spend the extra $ without a decent guarantee that the pump would last long enough to recoup the difference.
Thanks in advance for any thoughts.
Mark