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How Hot Do Hot Tubs Get

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Temperature In Different Weather Conditions

23 Crucial Things to Know Before Buying a Hot Tub

Depending on the particular season, changing the temperature ever so slightly can help you make the best use of your hot tub.

During winter and the colder months, youre going to want to set your hot tub a little warmer than you would generally prefer. Because the cold air and wintery breeze will strip the heat from your hot tub, which needs to be offset by a higher temperature in the water. 102 to 104 degrees is a typical setting during winter.

During summer, you may, in fact, want the opposite. Because youre looking to cool down , Ive actually found its quite nice to relax in water thats been set closer to the 80 to 85-degree level. Its very refreshing for a soak, without being cold, so you can also stay and enjoy the water for much longer in the pleasant weather.

How Long Should It Take A Hot Tub To Get Hot

Firstly, we must remember hot tub heaters vary considerably, from 1KW up to 6KW, and the volume of water to be heated varies, as does the mains water temperature from summer to winter. As an example, let’s look at a 300 gallon hot tub with a 1.5kW heater, with summer temperature mains water. You should expect this to be hot in about 20 hours. Bigger spas, different heaters and winter mains water will all have longer or shorter heating times. A final point – hot tubs are designed to be hot 24/7. Once a hot tub is hot you are only ever topping up lost heat. A 1.5KW heater will put about 3 degrees of heat into a spa per hour, so a typical 1/2 hour use will drop the spa temperature about 1 degree, meaning it will take about 20 minutes to recover.

Best Hot Tub Temperature For Most Healthy Adults

For most healthy adults, a water temperature of 100 degrees F is safe, according to the US Consumer Product Safety Commission . At this temperature, you will receive all of the benefits from warm water therapy and a great relaxation experience. According to the CPSC, water temperature should never exceed 104 degrees F. Because of this, the temperature limit on most hot tubs is 104 degrees. Though modern hot tubs should not exceed this temperature, its best to check the temperature with an accurate thermometer before you use the spa.

There are some instances when you should keep the temperature lower than 100 degrees F for safety reasons. Lets take a look at some of those now.

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What Is The Most Energy

The most energy-efficient inflatable hot tub is the Intex PureSpa. It comes with both an insulated lid and a thermal ground cloth. But its 1,300-watt heater is also more powerful than most inflatable hot tubs.

to see the Intex PureSpa on Amazon.

Although I explained that inflatable hot tubs are not as energy efficient as regular solid-body hot tubs, some are more efficient than others.

The thing to look for is the cover. Most of the heat loss occurs through the lid of the hot tub, which is why this needs to be in place when your hot tub is not in use.

One of the best on the market for energy efficiency is the Intex PureSpa, available here on It comes in two sizes 4-person and 6-person , and it is a favorite of mine for three reasons:

  • It costs less than $1,000,
  • The specs are great
  • Its the #1 Best-Selling inflatable hot tub on Amazon with hundreds of awesome reviews

The 6-person tub is equipped with 170 water jets powered by a 1.1hp pump, providing a flow rate of 7.7gpm to give you that excellent spa experience.

With an inside diameter of 65 inches and a height of 28 inches, it can comfortably seat six adults, unlike some so-called 4 to 6-seaters.

Made from a laminate PVC, it is both comfortable and durable.

to see the Intex PureSpa on Amazon.

Speaking of durable, if you ever wondered whether inflatable hot tubs are durable enough, you should read thisrecent article here on my website.

Just click that link to read it on my site.

Start Low Then Gradually Raise Your Spa Temperature

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Set your spa controls to 98 °F or 99 °F, and as you soak, increase the temperature gradually until you can enjoy an invigorating massage without feeling overheated. If you have the urge to get out or sit on the cooling step after a couple of minutes, that’s a sign that your water temperature is too high for comfort.

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Dont Exceed 104 Degrees For Adults

The US Consumer Product Safety Commission has determined that temperatures above 104° Fahrenheit are dangerous for adults because they can lead to heatstroke. In general, people are most comfortable with temperatures between 100° and 102° . Adults are safe to soak at these moderate temperatures for twenty minutes at a time.

The Best Hot Tub Temperatures For Safety And Comfort

What is the best hot tub temperature? While it might seem like the hotter your hot tub, the better your experience will be.

However, thats not always the case: different temperatures may be a better choice in terms of both safety and comfort.

Ahead, well explain why hot tub temperature matters and reveal the best hot tub temperatures for your needs.

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How Do I Know If My Hot Tub Heater Is Working

The heating element in a hot tub heater works the same way as the heating element in a typical water heater. That means the heating element will burn out rapidly if there is no cooling water around it.

With plenty of water around it, the heating element remains warm and not hot to the touch. A heating element that works appropriately will raise the hot tub waters temperature in a short time, say 1 hour. If it maintains the desired temperature, it shows its working correctly.

How Effective Is A Ground Mat In Inflatable Hot Tub Temperature Management

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In your endeavors to maintain the heat in your inflatable hot tub, you might want to consider investing in a ground mat as well.

Many of the hot tubs in this class will not come with a ground mat.

If this is your case, buy one to ensure that your interests are well taken care of. Remember that the thinnest part of the insulated hot tub is the floor.

As a consequence, significant heat losses can be incurred through the floor.

You do not want to lose the efficiency of your inflatable hot tub via the ground, and your number one solution to this will be a good quality ground cover.

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What Are The Recommendations For Children Using A Hot Tub

HSG 282 states that children under 4 years of age should not be allowed to use a spa. In the USA the CDC sets the minimum age at 5. This is partly due to water safety, but also has an element of temperature consideration as children dont have the same heat tolerance as adults. Their smaller bodies and thinner skin make them more susceptible to heat.

At the maximum recommended water temperature, children should not use the hot tub for more than 5 minutes at a time. Dropping the water temperature by a few degrees to 36.5° C / 98° F will allow for a longer soak, but even this should be limited to a maximum of 15 minutes. To reduce risk of children overheating, sitting on a booster cushion is also a good idea as in this way young children avoid full body immersion, allowing their bodies to regulate heat more effectively. Never allow children to use a hot tub unsupervised.

What Do You Do If Your Spa Water Is Cloudy

Cloudy hot tub water can mean two things, 1) that the filtration is failing to clean out the small dust particles in the water or 2) that there is bacteria growing in the Spa. If it is Dust then I would suggest you buy a product like spa sparkle which acts like a coagulant and captures all the dust in the filters. Note that once the hot tub is nice and clean you need to get the filters out and clean them, if you don’t then after 24 hours the spa sparkle will break down and empty the dust back in to your hot tub. If it’s bacteria then you need to act fast and shock the spa with a double the normal does of both Chlorine and Non Chlorine Shock.

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Warm Hydrotherapy In Winter

First, lets talk about the standard maximum hot tub temperature that is pre-set in most hot tubs. Most spa models designed nowadays will not allow the spa to exceed 104. This is for the safety of the spa itself, as well as for the protection of the people using the hot tub on a regular basis.

You can determine the temperature of the water that you most enjoy, depending on the season or purpose for spa time. During the coldest days of the year, the heated water is often calling your name for its instant warming capability. By utilizing the heater, you can easily control the temperature of the spa water. You can head straight out for a soak without having to wait for the water to heat or to cool in the meantime.

Some soakers feel that the 104 limit is too warm for comfortably entering or resting in the spa. Many people find that their sweet spot lies between 100 and 102 just warm enough to relax and unwind depending on the time of year.

The Best Temperature For The Elderly:

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Once again, referring back to health concerns, particularly heart issues, its important to speak with your physician before purchasing or using a hot tub. Your doctor may recommend that it is a good idea to relax and unwind in warm water instead of hot. It is also a good idea to keep a bottle of water around to ensure you stay hydrated, regardless of the temperature of your spa.

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What Is An Air Lock In A Hot Tub

Air locks happen when the hot tub is being filled with water. It is possible for both ends of a plumbing system to simultaneously fill up with water at both the suction end and the return end which sometimes leaves an air lock in the plumbing. This can cause both heater and pump problems. To overcome this issue it is suggested to push the hose pipe down into where your filters screw in which will purge all the air out of your important heating and circulation systems.

How Long Will It Take For My Spa To Warm Up When I’m Ready To Use It

After filling your spa for the first time, allow 18 to 24 hours for your water to reach a temperature of 100 °F .

After your initial setup is complete and you’re enjoying your routine of daily hot tub use, you’ll want to make sure your hot tub is always ready to deliver the ultimate in hydrotherapy. To do so, simply set your spa to your ideal temperature, then close it up and leave the thermostat set at that level. Hot Spring spas feature insulated cabinets, custom-fitted covers, and energy-efficient circulation pumps that work together to maintain a steady temperature while conserving energy.

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Do All Inflatable Hot Tubs Have Built

When you go to a spa and dip yourself, there are always seats which are designed to align you with the installed jets and make your experience more comfortable.

You would expect the same thing with an inflatable hot tub, but sadly they all dont come with seats.

In replacement of the seats, they all come with an inflatable ground cloth. The hot tub is placed directly on top of the ground cloth to act as additional protection from sharp debris that may puncture it underneath.

More importantly, the ground cloth makes the bottom of the tub very comfortable to sit on. It provides a soft cushion so you wont feel the hardness or unevenness of the ground.

However, if you really want to have a seat for your inflatable spa, you can certainly purchase them at a reasonable price online.

Healthy Temperature For People With Heart Disease Circulatory Problems Diabetes And High Blood Pressure Or Those Taking Certain Medications

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We suggest that any people with the medical conditions stated above talk to their physician before using a hot tub. The safest temperature for people with these conditions may vary from person to person.

People who take medications that induce drowsiness, such as tranquilizers, antihistamines or anti-coagulants should also consult their doctor before using a hot tub. It may not be safe for these people to use hot tubs because of the risk of falling asleep in the water.

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Allergic To Chlorine Saltwater Hot Tubs Is Your Best Choice

An inflatable hot tub is very easy to maintain. All of the models come with a standard water filtration system which helps to keep the water free from debris like hair strands, etc.

Most of them come with a chemical floater to place chlorine or bromine tablets. As you may already know, chlorine helps to keep the pH balance or alkalinity of the water.

However, if youre allergic to chlorine or you just cant stand how uncomfortable it feels after soaking in chlorinized water, then these chemical tablets should not be part of your option. You can choose a portable spa that doesnt use chlorine.

Fortunately, most high-end units these days come with a saltwater treatment system. Instead of using a chemical floater, you basically just add salt and the system will convert it into a natural chemical which functions like chlorine.

A saltwater hot tub can be expensive at first glance, but they usually include other high-end features like hydro jet massage and hard water treatment system.

Maintaining Hot Tub Energy Efficiency

When it comes to keeping your hot tub at the ideal temperature, its important to consider the efficiency of the system. Otherwise, you risk an astronomical electric bill.

To combat this, some users will lower their hot tub temperatures overnight then jack them back up during the day. Believing this helps them to save costs. Trouble is, this actually has the opposite effect.

The heating element in your hot tub has been designed for efficiency, not the rapid heating of the water. Repeatedly turning it up or down will play havoc on the system.

You will burn more energy using an approach like this, as the heater struggles to hit the ever-changing temperature setting, and you risk damaging the heating element itself .

Its a much smarter idea to boost your efficiency by insulating your hot tub, especially the sides and the top. Once youve reduced the ambient heat loss, your heating element will not need to work as hard to maintain your set temperature, which will bring the electricity costs right down, and create an energy efficient system.

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Factors Affecting The Heating Time Of A Hot Tub

A standard six-person hot tub usually holds from 320 to 475 gallons of water. When youre ready to soak up all the warmth and bubbles of your spa, thats a lot of water to heat up. To maximize your relaxation time, youll want it to heat as quickly as possible.

Several factors influence how long it may take your hot tub to heat up to the desired temperature. Fortunately, you have control over them all, which gives you control over how long you must wait before the water is just right.

If youre just starting to research hot tubs to purchase, know the difference electrically between 110 vs 220 hot tubs.

Maintaining Your Ideal Temperature

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All the Hot Tubs we sell feature controls which make maintaining and adjusting the temperature of your tub easy. Built-in thermostats measure the water temperature and adjust the heating as required. You can turn this up and down to suit your mood although with all modern tubs you wont be able to turn the heat up beyond a fixed limit.

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How Do I Get Rid Of My Old Hot Tub

Unless you have got a cracked shell in which case you need to pay to have the spa crushed all Hot tubs can be repaired and recycled. You can sell any age of Riptide spa to us, and we will refurbish it and sell through our website. If you wish to sell another brand, or aren’t in an area we cover, try your local spa dealer and see if he will buy it. At least you know it is going to be used and enjoyed this way.


Body Temperature Vs Hot Tub Temperature

Your body temperature is generally around 37°C. The impact this has on your hot tub experience can be quite profound. If the water is under 37 degrees then you may expereince a slight chill. This can be a nice sensation when you want to cool off in hot weather. Alternativley, in the winter when the ambient temperature is cooler you may want to give a buffer of a few degrees above 37, this is because the hot tub will cool slowly with the cover off so if you plan on a longer soak, you will stay warm for longer!

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