Do Heated Pools Cause More Evaporation and Water Use?

Heated pools do result in more evaporation, so more make-up water is required to refill heated pools than unheated pools. Whether using solar heating, heat pumps, or gas heaters, heated pools do require more water.

But how much will the increase in water usage cost?

We have heard just about every question imaginable when it comes to solar pool heating. That’s a question we had not heard before, and it’s a great question! As a curious bunch, it got us thinking… and calculating.

Cost of Water Evaporation In Heated Pools

The answer is not easy, but we can come up with a reasonable guess based on experience. First, we have to consider that for about half of the year, no make-up water is required due to rain in Southwest Florida. During the other half of the year, every pool owner needs to add water to refill their pool. Many factors impact the amount of water required, including whether the pool is screened, covered, protected from wind, circulated at night, etc.

It also depends to what temperature you heat your pool. The calculation would be extremely complex.

The humidity and temperature difference between the ambient air and the pool surface impacts the rate of evaporation. On cold, dry nights, evaporation can be significant as seen in this video below.

What Does Excess Water Evaporation Really Cost?

Based on experience, on the absolute high side, you might expect to need an additional inch of water per week for a heated pool. We can calculate out how much water that would be for a sample 14’x28′ pool:

14 ft x 28 ft x 1/12 ft depth x 7.48gal/cf x 26 weeks per year = 6,350 gallons

So what does this cost? This is another “it depends” answer.

Lee County Utilities currently charges $3.27 for water in it’s lowest residential usage tier. So the annual cost would be about $21 per year on the absolute high side. However, if you are on municipal sewer, you would need to add this cost at $5.85 per thousand gallons, adding another $37 per year.

In reality, for someone on municipal water and sewer, the cost would be pretty low. We expect that the added water cost would be in the range of $20 per year for most pools if heated at all times.

How Can I Minimize Water Evaporation Costs?

These are probably grossly inflated costs. It is extremely unlikely that you would increase your water usage by 1 inch per week, half of the year. The figure is likely much less. But there are steps you can take to reduce evaporation in a heated pool:

  • Only heat your pool when you actually plan to use it. If you always keep your pool warm you will need more make-up water. If you use electricity or gas, you are also throwing money out the window, quite literally.
  • Cover your pool. Nothing does more to stop evaporation than a solar cover, especially during cool and dry conditions and especially at night when most evaporation usually occurs.
  • Shelter your pool from wind. Wind increases evaporation dramatically.
  • Minimize water features. Waterfalls, deck jets, and spa overflows
  • Do not circulate your pool at night. This causes more warm water to reach the surface.

 

  • Comment (2)
  • blank Robertbit says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    https://www.longisland.com/profile/carrentalsantalyacom
  • blank MichealZoorn says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    https://virtual-local-numbers.com/countries/32-usa.html
  • blank Peterspild says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    https://european-sailing.com/thailand-catamaran-charter
  • blank CharlesKes says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    https://letterboxd.com/rentcaristanbul/
  • blank site says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    I recommend to you to visit on a site, with a large quantity of articles on a theme interesting you. I can look for the reference.
  • blank Josiahzef says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    https://continent-telecom.com
  • blank Athens Rental says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    Car rental in Athens
  • blank click says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    This situation is familiar to me. Is ready to help.
  • blank Tommie Canlas says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    Having read this I thought it was very informative. I appreciate you finding the time and energy to put this article together. I once again find myself personally spending a lot of time both reading and leaving comments. But so what, it was still worthwhile!
  • blank Adam Carpenter says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    Hi Jason, what temperature are you using for this? I’m assuming the smaller the surface area for the pool you and the shallower the pool, that would increase the gallons lost? Thank you.
  • blank Scot Scurlock says:

    Sorry you lost me with your calculation showing 6,350 gallons for 26 weeks or 245 gallons a week

    14 ft x 28 ft x 1/12 ft depth x 7.48gal/cf x 26 weeks per year = 6,350 gallons

    Then saying “However, if you are on municipal sewer, you would need to add this cost at $5.85 per gallon, adding another $37 per year.”

  • blank ikuneluq says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    [url=http://mewkid.net/who-is-xandra/]Buy Amoxicillin Online Without Prescription[/url] Buy Amoxicillin und.bpps.floridasolardesigngroup.com.fqj.om http://mewkid.net/who-is-xandra/
  • blank odisaiab says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    [url=http://mewkid.net/who-is-xandra/]Buy Amoxil[/url] Buy Amoxicillin Online Without Prescription gnl.pjcy.floridasolardesigngroup.com.xow.vc http://mewkid.net/who-is-xandra/
  • blank obacihuhava says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    [url=http://mewkid.net/who-is-xandra/]Amoxicillin[/url] Amoxicillin ghd.inop.floridasolardesigngroup.com.juu.cg http://mewkid.net/who-is-xandra/
  • blank obijabag says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    [url=http://mewkid.net/who-is-xandra/]Buy Amoxicillin Online[/url] Amoxicillin efr.rqvc.floridasolardesigngroup.com.saj.cg http://mewkid.net/who-is-xandra/
  • blank uidohudawefum says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    [url=http://mewkid.net/who-is-xandra/]Amoxicillin 500mg Capsules[/url] Amoxicillin 500mg Capsules tzq.fkwr.floridasolardesigngroup.com.uqp.ca http://mewkid.net/who-is-xandra/
  • blank jimofuw says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    [url=http://mewkid.net/who-is-xandra/]Amoxicillin 500 Mg[/url] Amoxil Dose For 55 Pounds adz.itud.floridasolardesigngroup.com.mvi.eh http://mewkid.net/who-is-xandra/
  • blank anigeheba says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    [url=http://mewkid.net/who-is-xandra/]Amoxil[/url] Amoxicillin Online yre.zniw.floridasolardesigngroup.com.qda.gs http://mewkid.net/who-is-xandra/
  • blank mivipemozacux says:
    Your comment is awaiting moderation. This is a preview; your comment will be visible after it has been approved.
    [url=http://mewkid.net/who-is-xandra/]Buy Amoxicillin Online[/url] Amoxicillin 500 Mg fpk.ctcu.floridasolardesigngroup.com.uow.ez http://mewkid.net/who-is-xandra/

Leave Your Comment


The reCAPTCHA verification period has expired. Please reload the page.

Share the post

Related Solar Education Article

Scroll to Top