Are New Hot Tubs More Energy Efficient? Is it Worth the Investment for Energy Savings?

Are you considering buying a hot tub, but concerned about the energy costs? With rising electricity bills, it’s important to choose a hot tub that is energy efficient. But with so many options on the market, it can be overwhelming to know where to start.

In this article, we’ll explore what makes a hot tub energy efficient and provide tips on how to choose the most efficient one for your needs. We’ll also highlight three of the most energy-efficient hot tubs that we offer, so you can make an informed decision and enjoy your hot tub without breaking the bank.

Let’s get started!

Are new hot tubs more energy efficient?

New hot tubs are more energy efficient compared to older models. They offer excellent insulation and more efficient pumps and controls.

The difference in efficiency can be seen in models that were sold even just a decade ago. Many people find that buying a new energy-efficient hot tub will cost them less than operating and heating an older model.

Hot Tub Basics

What is a hot tub?

A hot tub is a large tub of heated water that can be used to relax or for hydrotherapy. When you hear the term hot tub, it’s pretty generic. It can include tubs that have jets, bubblers, or nothing at all.

Hot tubs are generally intended to be used by more than one person. They can be placed outdoors on patios or in backyards. You can also install a hot tub indoors if you’d like.

Components of a hot tub

No matter what type of hot tub you choose, you will find that it has several main components. These include:

The Shell

This is the inner hot tub surface that contains the water, has various seats in its mold, and provides mounting points for the jets. The shell is reinforced with either fiberglass backing, a high-density polyurethane foam, or a combination of the two.

Cabinet

The cabinet provides structural support for the shell and equipment. It also hides the inner workings of the hot tub. Many modern hot tubs are made from weather-resistant polymer.

Pumps

A hot tub will have at least one pump to circulate the water in and out of the hot tub. There are two speeds. The low speed is used for heating and the high speed is for operating the jets.

Jets

The jets are what create the bubbles that massage the body and relieve muscle soreness.

Spa Pack Controller or Heater

The spa pack has a controller and heater in one. The controller allows the pump, filter, heater, and jets to do their jobs. The heater obviously warms the water. The spa pack can also control lights or power an ozonator.

Topside Control

This control pad allows bathers to change the water temperature. You should never set your hot tub to a temperature above 104 degrees.

Filtrations/Sanitation System

The filters and sanitation system help to keep your hot tub and water clean.

Ozonator

An ozonator helps to destroy organic material with a special light that is injected into the spa. Chemicals still need to be used for proper sanitization.

Equipment Area & Access Door

This is the area where you can find the plumbing and inner workings of your hot tub.

Hot tub vs. spa: clarifying the terminology

The words hot tub and spa are often used interchangeably, but they are not the same. A spa is a term often used to describe an in-ground spa. As we mentioned above, a hot tub is above ground and is a large tub of heated water.

Energy Efficiency: A Primer

If you’re thinking of investing in an energy-efficient hot tub, you need to be familiar with what this includes as well as the benefits of looking for energy-efficient products.

Defining energy efficiency

Energy efficiency is when less energy is used to do the same job or get the same result.

Benefits of energy efficiency

There are several benefits of using energy-efficient products. They are obviously better for the environment because they can lower greenhouse gas emissions and decrease water use. Energy-efficient products also result in lower electric bills because there is less electricity usage. They can also lower overall electricity demand and reduce the need to invest in new electricity generation.

Measuring energy efficiency

Energy efficiency is typically measured using the energy use index. This is the energy consumption per unit conditioned floor area. In the United States, this is measured in Btu per square foot.

Traditional Hot Tubs: A Retrospective

To understand how hot tubs got to where they are today, we need to take a look at where they came from.

The history of hot tubs

The first idea of hot tubs dates back to 1500 B.C. when ancient Greek pools were built around volcanic springs to get warm, mineral-rich water for relaxation and healing. These structures eventually shifted from bathing usage to entertainment.

The Romans later took the spa to the next level with more elaborate baths that were spread throughout their colonies. There were later advancements with radiant heating in floors and walls and boilers to heat pools.

When you’re talking about the history of hot tubs, it’s also important to look at the Japanese influence. They used personal wooden soaking tubs for centuries.

Fast forward to the early 1900s when spa resorts started popping up all over Europe and the U.S. Many of these resorts were molded after Roman architecture and used to promote better health.

When American troops returned from Japan after WWII, they brought back the bathing culture and wooden tubs. These inspired the first wooden tubs in the U.S.

Fiberglass and acrylic spas debuted during the 1960s. Roy Jacuzzi is credited with creating the first type of hot tub, a self-contained whirlpool bath system that is the precursor to the hot tub as we know it today.

During the 1980s and 1990s, more features were added to hot tubs such as jets and lighting.. Since then, manufacturers continue to update and tweak hot tub designs with more features.

Early hot tub energy consumption

Older hot tubs need to work harder to heat water, using more power to raise the water temperature. Larger hot tubs also have more water to heat and can cost more to run.

The energy cost of a hot tub varies depending on the heater. This can draw anywhere from 1,500 to 6,000 watts. The pump also uses energy, estimated at about 1,500 watts. The energy cost to run a hot tub will depend on your energy cost per kilowatt-hour which will vary depending on where you live.

Lessons from the past

Many of the best hot tub brands out there have learned from their predecessors what makes a more energy-efficient hot tub. From finding quality parts to using quality materials, the hot tubs made today take energy consumption and efficiency into consideration.

Modern Hot Tub Innovations

Since the early days of hot tubs, manufacturers have made advancements to make hot tubs more energy efficient. This is an effort to make their products more appealing to consumers who may have reservations about energy consumption.

Insulation advancements

A hot tub’s insulation will weigh heavily on how energy efficient it will be. Full foam insulation is now the industry standard. It is more energy-efficient than partial foam, resulting in a hot tub that is made better and less expensive to use.

Energy-efficient pumps and heaters

Some hot tubs have a two-speed motor that uses the same pump for low and high-speed circulation when the jets are on. These are often not very energy efficient. For energy efficiency, some manufacturers use separate pumps for circulation and jets. While the initial costs can be slightly higher, you end up saving more in the long run.

Smart control systems

Throughout the years, manufacturers have upgraded their control systems so that you can turn on the heat, and control other functions of your hot tub without being in the water. Outside control panels as well as apps to control features have become increasingly popular.

Eco-friendly materials

Many modern hot tubs are made of recyclable materials. They can also be run on solar power if you choose, to further lessen your carbon footprint.

Comparing Old and New Hot Tubs

Heating and energy use

Newer hot tubs can be more energy efficient and produce a lower hot tub energy cost depending on the pumps and heaters that are used. Cost always depends on how big your tub is and the temperature you keep it on.

According to the National Spa and Pool Institute, a hot tub uses, on average, 2514 kilowatts per hour in energy each year. The majority of this energy goes into heating and circulating the water. A small amount of power is used for lighting. Even when hot tubs are covered and not being used.

High-quality hot tubs are more energy efficient than those of lesser quality. Dense full-foam or multi-density foam insulation helps prevent heat from escaping from the sides of your hot tub, resulting in less energy use.

Operational costs

While energy costs have risen over the years, the cost of operating your hot tub will rely heavily on the rates in your area. The cost of operating a hot tub on the west coast versus the east coast can be extremely different depending on the set energy rates.

Environmental impact

More energy-efficient hot tubs made currently will aim to use materials that are better for the environment compared to older models. Also, with less energy used, the stress on the environment is diminished.

User experience

While both older and more modern hot tubs both provide a relaxing experience, modern models offer more bells and whistles than in the past. This can include more massaging jets, lights, music, and control features to amplify the user experience.

Certification and Standards

There are several different types of energy certifications and standards to be aware of. These include:

ENERGY STAR certification

The ENERGY STAR certification is an internationally recognized and trusted mark of high efficiency. Products with this label are certified to use less energy and reduce emissions that contribute to climate change.

California Energy Commission (CEC) standards

The California Energy Commission aims to lead the state to a 100% clean energy future. It helps to create the energy system of the future that is clean and modern.

International standards and comparisons

The International Organization for Standardization is a worldwide federation of national standards bodies of more than 160 countries. The group works together to develop and promote international standards for technology, working conditions, and more.

Case Studies of Hot Tub Energy Efficiency

Residential hot tub installations

When it comes to residential hot tub installations, it’s important to consider international standards and comparisons for energy efficiency. The International Organization for Standardization (ISO) has created a standard for hot tub energy efficiency. This takes into account factors such as insulation, heating systems, and covers.

Some countries have also implemented energy efficiency regulations specifically for hot tubs, such as the United States Energy Policy Act of 2005 which requires hot tubs to meet certain energy efficiency standards. By researching and comparing different standards and regulations, you can make an informed decision about which hot tub will be the most energy efficient for your home.

Commercial spa installations

There are additional factors to consider when it comes to commercial spa installations. Commercial spas often have larger hot tubs that require more energy to heat and maintain. They also have higher usage rates that can lead to you using more energy. You want to choose a hot tub with efficient heating systems, such as heat pumps or solar panels. You also want to invest in proper insulation and covers to reduce heat loss.

Implementing energy-saving measures such as timers and automatic shut-off systems can also help to minimize energy waste. By prioritizing energy efficiency in your commercial spa installation, you can not only save on energy costs but also reduce your environmental footprint.

Retrofitting older hot tubs

If you have an older hot tub that is not as energy efficient as you would like, retrofitting may be an option. Adding insulation to the hot tub cabinet or replacing old, inefficient components with newer, more energy-efficient ones can improve your hot tub’s energy efficiency. Consider upgrading to a more efficient pump or heater. You can also install a timer or automatic shut-off system to reduce energy waste. While retrofitting may require an upfront investment, it can save you money in the long run by reducing your energy costs. Be sure to consult with a professional to determine the best retrofitting options for your specific hot tub.

Making the Most of Your Hot Tub

Maintenance tips for energy efficiency

To get the most life out of your hot tub and keep the running costs of a hot tub down, you’re going to want to take proper care of your hot tub. This includes:

• Keeping it at The Right Temperature

Lower the hot tub temperature when you’re not using it to increase efficiency. You may have to wait a little longer to get the hot tub water to the temperature you want when you go to use it next time, but you’ll keep your energy bill down.

• Turn Jets Off

When you get out of the tub, turn the jets off. This will help to save energy and money.

• Follow a Regular Maintenance Plan

Following a maintenance schedule will keep all parts running smoothly and efficiently. The water quality will be better and the filters will be clean.

• Keep it Covered

Be sure your hot tub cover fits snuggly. This will keep the heat in and prevent water loss so you’re not constantly using gallons of water filling your hot tub. It will then take less energy to heat the water.

Choosing the right hot tub size

When it comes to how to choose a hot tub, you don’t want to have a hot tub larger than you need. This will result in higher electricity costs to heat it and maintain it.

Hot tub placement considerations

Consider where you’re going to put your hot tub. If you choose a heavily shaded area that doesn’t get much sun, your hot tub may not hold the water temperature as easily. This means it may cost you more to keep it heated.

Alternative Energy Options

Heaters are not the only energy option for your hot tub. There are alternative energy options to consider.

Solar-heated hot tubs

A solar-heated hot tub uses a solar collector during the day to heat the tub, much like homes that use solar power. Remember that in the evening, you may still need an auxiliary heater.

Heat recovery systems

Heat recovery systems for hot tubs capture and recycle the wasted heat or energy that the pump produces and delivers it to the water.

Geothermal heating

Geothermal heating for hot tubs works by drawing on the core temperature under the earth to heat and cool the pool. Geothermal heating units typically use a heat pump to draw the heat from the earth and the water.

Wrap Up

Energy-efficient hot tubs for sale today can help you save money due to advancements in the parts used and the way they are made. Upgrades to heaters and pumps can result in less energy used to get the same or even better results.

It’s important to look at the type of insulation used and whether the hot tub is fully insulated, to promote energy efficiency. Taking steps to maintain your hot tub, such as keeping the cover on tightly, can also help to increase efficiency. You may also want to avoid placing your hot tub in a heavily shaded area that may not be the warmest spot in your yard.

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About The Author:

Manny Brambila

Pool & Spa Expert

Manny has been in the Pool & Spa industry for over 15 years and is considered a pool, swim spa, & hot tub expert. He has been a Certified Pool & Spa Operator (CPO) since 2009 and worked 15 years in aquatic training and development for the largest pool chemical and customer care company. He also has been an outside consultant for the Pool and Spa industry in Chicago, New York and Los Angeles since 2018. In the past few years Manny has become Director of Operations for Epic Hot Tubs with a priority of providing customers with the most reliable information and best service possible.