You should never leave your pool heater on overnight. Doing so is not efficient and will cost you more than it would if you just turned the pool heater off. While many of us know that heating a pool can take up to several hours, running it overnight defeats the purpose of heating it at all.
As long as you are willing to wait for the pool to heat, it is cheaper to turn off the heater when you aren't using the pool. BTUs are BTUs. The pool needs a certain amount to heat to a certain temp and will lose a certain amount.
The efficiency of the heater? Physicist: The correct answer is always to leave the heater off for as long as possible, as often as possible. The one and only gain from leaving a pool heater on is that it will be warm when you get in. The same is true of all heaters (pool, car, space, whatever).
If the pool is in continuous use, or if you want to use it spontaneously, it must be kept heated all the time, which raises the cost. Keeping an insulated or solar cover on the pool between uses minimizes the heat loss.
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One of the reasons you aren't recommended to leave your pool heater turned on overnight is that it may cost a fortune to keep the pool heated for all those hours. Operating and energy costs may also increase especially on colder nights.
A pool that is uncovered can lose up to 5 degrees F overnight; a good cover can cut that loss by half. Used at night or whenever your pool is not in use, the pool cover can help save fuel costs by cutting heat loss regardless of the type of heating you utilize.
The best time to heat your pool is during the day at least several hours before you plan on using it. The risk of running your pool pump overnight is that the outdoor temperature might be too low for the pump to efficiently warm your swimming pool.
It is not advisable to heat your pool at night because of the time and energy it will consume. You're advised to heat your pool during the day for more efficiency, and if you can, buy a solar blanket to retain the temperature of your pool.
Depending on its purpose, competitive swimmers would prefer a cooler water temperature, whereas young children and senior citizens would benefit more so from warmer temperatures. Despite this, the average pool temperature, which is said to be ideal for all, is between 77-82°F.
Higher temperatures are therapeutic
While pools should be never above 95 degrees, anywhere in the 90-92 degree range creates a comfortable, yet therapeutically warm environment for older swimmers or infants and toddlers learning how to swim.
No matter where you're swimming, avoiding water below 70 degrees Fahrenheit is a good rule of thumb for the average swimmer. The truth of the matter, though, is that 70 degrees is still pretty chilly. You'll probably have a better time if you wait for warmer water. In fact, you'll be safer, too.
It depends on a few things to determine how long it takes a heat pump to heat a pool. However, overall a heat pump generally heats a pool after 24 to 72 hours by 20-degrees Fahrenheit. For smaller pools like a spa pool, the heat pump can heat a pool between 45 and 60 minutes.
In dry and/or windy conditions, the evaporation rate of the pool increases. Therefore, it is generally beneficial to have a transparent or bubble cover on during daylight hours. In warm, humid conditions the evaporation rate decreases. In this case, it may be more beneficial to leave the cover off during the daytime.
Air bubbles in the pool cover act as an insulator in a similar way that your thermos would keep water warm. A pool cover will, therefore, keep your pool water warmer for longer.
When pool water evaporates, it carries with it heat and therefore cools the pool water down. So if evaporation is prevented, then there will be much least heat loss. So simply put, covering your pool you will help warm the water up.
Many of the INTEX pump/filters are NOT UL rated and you should not swim with them plugged in. They do have one or two that are UL rated and can be left on while swimming. Just about all other pool equipment brands can be used while you are in the pool when properly installed.
You should cover your pool every night for several reasons. First off, a pool cover saves energy and conserves water by decreasing the amount of make-up water. Also, it reduces the consumption of chemicals, and finally, it saves a lot of cleaning time since it keeps the debris out of the pool.
On average, natural gas burns about 1 therm per 100,000 BTUs per hour (British Thermal Units). Meaning, an average pool heater between 300,000 and 400,000 BTUs will cost anywhere from $3.30 to $4.40 per hour to heat your pool.
The fastest way to heat your pool is to use a gas pool heater and a solar cover. It's like heating up your coffee in the microwave and putting a lid on it. No matter how you plan to heat your pool, you should at least have a solar cover (or liquid solar cover) to help you retain the heat.
You have a 20,000-gallon pool and use a 125,000 BTU heater. Your water is currently 70 degrees F but you would like it to be a minimum of 80 degrees F. How long will it take before the pool water reaches 80 degrees F? 10 x 1.33= 13.34 hours of heating before the pool reaches 80 degrees F.
According to the World Health Organization, water temperatures ranging from 78 to 86 degrees Fahrenheit are generally comfortable and safe for those engaging in moderate physical activity in a pool.
Lap swimming for exercise
Most lap swimmers like the water temperature to be somewhere between 75-80 degrees. Being active by swimming laps will cause the body to heat up fairly quickly.
The temperature of the water was -2.2 degrees Celsius when Titanic was sinking.
Water temperatures are slow to heat up, and just as slow to cool down. Water is very "stubborn" to change temperature. It takes 4 times the energy to heat up water than to heat air. Water also "feels" colder because water is a more efficent medium than air to cool our body down.
How cold are Olympic pools? Overall, water temperatures for competitions need to be between 25-to-28 degrees Celsius or 77-to-82.4 degrees Fahrenheit. However, FINA, the international federation that handles water sport rules and regulations, said that different sports require slightly different pool temperatures.