Is anyone using a procedure to allow for different swimming pool temperatures through the day?  My evening classes are "cold" needing a warmer swimming pool, the atrium affect in the morning, my clients are "hot" - in more than one way - just joking!

Seriously, to make best use of the swimming pool any 8 hours at this temp, 8 hours at this and night time - heater simply off?

Any studies on the utility consumption?

Thank you for listening.

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I don't have any specifics, since every pool will be different, and it depends on the amount of the swings. I do know that constantly changing temperatures will cause a significantly increase in expense for heating. If you are draining and refilling with cold water you have the additional expense of the water as well.

After many years of discussing this with operators that have the same concerns that you do, I think you have to determine a medium-range compromise. In reality, you will never make everyone happy, no matter what you do. I would pick a temperature and then tell anyone who asks that you cannot change the temperature; "the equipment won't allow that." The hard core approach is to just tell them you can't change it because other larger groups of people will complain.

From a budget standpoint, keeping the water temperature as low as possible without causing a riot is your best bet. One thing that can help to some extent is keeping the air temperature constant and warmer than the water. Heating and cooling the air is much cheaper than heating and cooling water, and it will also reduce the damage condensation can cause. Water doesn't evaporate near as quickly when the air temperature is high enough to change the heat exchange from the air to the water. If the heat is going from the water to the air, humidity levels go way up and heating costs go up with it.

In addition to everything else, the changes in temperature, especially in the heater, can throw you water balance off. If you faithfully maintain calcium saturation, you will likely be using up your heat exchanger capacity (it will probably scale) as you run the heater for long periods of time.
Dear Mr. Keifer,

Great tips and advice. That is what I needed. I would not have thought about the calcium saturation which is ironic because I did allot of work for a municipal facility to soften their water.

Thank you very much!

Kindest Regards,
Kelly Engaldo, MBA

I attempted this feat about 15 years ago at the Reebok Sports Club/NY, and it failed MISERABLY...

We had an oversized heater, and CHILLER, to raise and lower the temps on demand.

We WERE able to get the pool from 80 - 85 degrees, and back, within a 1 hour period. This however, proved to be very problematic; we had issues with maintaining water balance, and as you would know, the pool surfaces, and the heater and chiller elements suffered.

We abandoned the project after a year.

My suggestion to you is to find a HAPPY medium for all patrons. As a CPO for many years, it is just impossible to keep everyone happy, UNLESS you have multiple bodies of water.

Stick to one temperature, and POST it for your members as a Mandate. There will be resistance in the beginning, but when the dust settles, everyone will comply, and live with it.

If you are going to cater to your lap swimmers, suggest your aqua and therapy users to invest in a wetsuit. They will appreciate the suggestion, as it will DEFINITLEY keep them warm (not to mention the potential revenue stream for your facility).

Hope this helps! - Clemente
Word of experience - very much appreciated - thank you!
This is a daily fight in our industry. The key is to find a polite compromise temperature and stick to it. Patrons set their expectations on a constant and can find methods to make themselves comfortable. We strongly advise swimmers trap body heat with a wet wrap (easier on & off) or go to WalMart and buy tight UnderArmor (cheap option).

We seriously promote a full shower before swimming. THAT makes a world of difference!

Don't forget- I think the air needs to be within 2 degrees of the water.
I love my UnderArmor - I need to start wearing it.

We have this problem every season change.

Yes, I did forget about the 2 degrees - that is really helpful.

Great tips.

Thank you very much!!
Yep air temp should be 2 degrees above water temp for proper evaporation rates.


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