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How Energy Efficient are your hot tubs? October 2022 Ofgem Energy Price Guarantee.

With the rise of energy prices, asking "how energy efficient are your hot tubs", is one of the most important questions to ask a hot tub retailer when purchasing a new hot tub for the first time. However, many hot tub retailers and hot tub manufacturers are starting to make spurious claims about the energy efficiency of their hot tubs, and there are very few that can provide independently tested results to back there somewhat wild and misleading claims... So, you will be glad to know that we can independently verify the energy efficiency on our range of multiple award-winning hot tubs, but more importantly we have published the independent TÜV SÜD test results below which demonstrates the energy consumptions based on the latest Ofgem Energy Price Guarantee (October 2022).

How Energy Efficient are your hot tubs? Ofgem Energy Price Guarantee - October 2022
How Energy Efficient are your hot tubs? Ofgem Energy Price Guarantee - October 2022

For over 10 years, Penguin Spas has partnered with some of the UK’s best designers, best suppliers, and best manufacturers of hot tubs and spas to ensure we can deliver the UK’s most energy efficient hot tubs and spas on the market.

Our Commitment - World's First Net Zero Carbon Neutral Hot Tub and Swim Spa Showroom

In 2021, Penguin Spas took the radical decision to be the worlds first net zero carbon neutral hot tub and swim spa retailer by investing in clean green technology for its new 1,283m2 Premium Outdoor Living showroom in South Lanarkshire, Scotland by offsetting the energy used through renewable sources which includes a 30Kw Wood Pellet Biomass heating system along with 10kw of solar cells with the latest TESLA Powerwall (battery that stores energy) which provides all the electricity required for the hot tubs and showroom.

How did you independently test the energy efficiency of your SmartSpa™ R10 hot tubs?

The manufacturer of Sunbeach Spas established the only hot tub factory with witness laboratory of TÜV SÜD Certification in the world. Through several tests in the laboratory of SmartSpa™ R10 insulated hot tubs alongside a direct comparison of a normal insulated hot tubs, the TÜV SÜD experts where able to conduct testing, measurements and certification in-line with the applicable norms and standards to independently certify the energy efficiency of SmartSpa™ R10 insulated hot tubs - See the results below.

TÜV SÜD Testing Certification

What is SmartSpa™ R10 and SmartSpa+™ R18 insulation? - Look for the SmartSpa™ Logo.

UK hot tub designer Sunbeach Spas and Oasis Spas introduced the registered trademarks of SmartSpa™ R10 and SmartSpa+™ R18 to their collection of hot tubs and swim spas earlier this year with the aim of combating the growing number of hot tub retailers across the UK advertising hot tubs with R10 and R18 energy efficiency without any independent certification nor any understanding of what exactly R values are.

The New SmartSpa™ and SmartSpa+™ logos gives consumers the confidence of purchasing an energy efficient hot tub that has been independently tested and verified of its credentials.

What does a R10 hot tub or R18 hot tub mean?

The R value refers to a materials ability to resist heat flowing through it at a certain thickness. The higher the R-Value, the better it can resist heat transfer. The R Value on our hot tubs are based on the thermal resistance of the hot tub elements which includes the closed cell foam sprayed on the shell, side skirts and base, where contradictory to the U value the higher the R value the better performing the product is, in the sense of reducing heat loss (the higher the R value the better the product is at insulating).

What difference does a hot tub with SmartSpa™ R10 insulation make?

A hot tub with SmartSpa™ R10 insulation will save you on average £84.26 per month or £1,011.16 per year on energy costs. To show the difference between a SmartSpa™ R10 insulated hot tub and a normal heat insulated hot tub, the TÜV SÜD independently tested both hot tubs electricity consumption under specified use conditions and the findings recalculated to reflect the current Ofgem Energy Price Guarantee @ £0.34 per/kWh (as from October 2022).

Test Conditions

  • Chamber temperature setting: 10°C

  • Test voltage: 230 V, 50 Hz

  • Water temperature: 37°C

  • Operation mode: Standard

How we tested the Sunbeach SB355L 5-Person Hot Tub

We tested the Sunbeach SB355L under these Conditions:

  • Removed upper cover for 30 minutes, and used the hot tub for 15 minutes during that time.

  • Twice water circulations every day with each water circulation lasting 3 hours and all the motor operating for 1 minute before each water circulation.

  • The rest of the time it was kept warm with the covers on.

TUV SUD Energy Test Results for the Sunbeach SB355L Hot Tub with SmartSpa R10

With SmartSpa™ R10 insulation, you will be saving £87.01 per month, or £1,041.08 per year in direct comparison to a hot tub with a normal heat insulation system.

How we tested the Sunbeach SB344S 5-Person Hot Tub

We tested the Sunbeach SB344S under these Conditions:

  • 2 Usages per day.

  • Twice water circulations every day with each water circulation lasting 3 hours and all the motor operating for 1 minute each day.

  • The rest of the time it was kept warm with the covers on.

TUV SUD Energy Test Results for the Sunbeach SB344S Hot Tub with SmartSpa R10

With SmartSpa™ R10 insulation, you will be saving £84.26 per month, or £1,011.16 per year in direct comparison to a hot tub with a normal heat insulation system.

TUV SUD Hot Tub Energy Efficiency Certification

What difference does SmartSpa+™ R18 hot tub insulation make?

Our exclusive, environmentally friendly, SmartSpa+™ R18 multi-layer insulation system forms a continuous thermal barrier that makes the Oasis Spas among the most energy-efficient hot tubs on the market and early tests show you can save between 11.6%-12.2% in energy usage in comparison to a similar sized hot tub - tests are still being carried out here in the UK by SPATECUK.

Oasis Spas with SmartSpa R18 insulation

Oasis Spas with SmartSpa+ full foam insulation


About Penguin Spas Premium Outdoor Living

Here at Penguin Spa Premium Outdoor Living, we are passionate about delivering the best quality hot tubs, best in energy efficiency, great value for money, and unbeatable customer service. Our friendly team is here to help you choose the right hot tub for your needs and your budget.

Award Winning Penguin Spas Premium Outdoor Living Showroom - Scotland

Our new Scottish outdoor living showroom is an oasis of calm, showcasing a large selection of multiple award-winning hot tubs and accessories we have to offer. Based in Yieldshields, near Carluke – right in the central belt of Scotland – we are within easy reach of the M74 & M8 motorway network and less than 35-minute drive to the city of Edinburgh and Glasgow.

Since 2012, Penguin Spas Outdoor Living have been devoted at creating and supplying elaborate products which are all designed to help improve people’s health, wellbeing, wellness, and happiness.

All our premium products are carefully designed and manufactured, and we strive to constantly improve ourselves and the products we deliver. We embrace new technologies and understand the importance of delivering reliable and durable products which help to improve our customers lives.

Do you want to know more about our range of multiple award-winning, energy efficient hot tubs available here in Scotland?

Here at Penguin Spas, we are proud to be the only official Scottish dealer of award-winning, energy efficiency gold standard hot tubs and swim spas from UK designed Sunbeach Spas and the world’s premier spa brand Oasis Spas

Both manufacturers of the Sunbeach Spas and the Oasis Spas have created a complete insulation energy saving system that reduces energy consumption to save you money. You can have peace of mind that your hot tub or swim spa will be hot and ready for you, without costly energy bills.

Sunbeach Spas are leading the hot tub and swim spa industry with energy efficient SmartSpa™ R10 insulation and cutting-edge technology. The multiple award-winning Sunbeach Spas are all designed here in the UK and are manufactured with the newest industry features which the company consistently pushes the industry forward with innovative designs and features.

Eco Spas are committed at improving the wellbeing of people and the health of our planet. Eco Spas is proud to be at the forefront of energy efficiency hot tub design and manufacture. Each of our holiday park hot tubs have been carefully designed here in the UK in compliance with current safety guidance written by the Health and Safety Executive (HSG282) which provides constant efficiency and immediate use while ensuring utmost hygiene and guaranteeing the easiest maintenance possible resulting in an experience that becomes an asset to your business.

Oasis Spas are built by one of the world’s largest international hot tub and swim spa manufacturers who distribute products in 40 countries around the world. Oasis Spas are built to last with premium components and the thickest shells on the market. The Power Saver Technology with SmartSpa+™ R10 insulation will save you thousands over the life of your hot tub or swim spa and the Easy-Care Technology makes maintenance simple.


Air Source Heat Pumps for Swimming Pools and Hot Tubs

The Poolex air-to-water heat pump (AWHP) provides hot water directly to your swimming pool or hot tub without using fossil fuels, providing a low carbon solution for an efficient, comfortable experience. Poolex uses 75% of natural energy absorbed from outside air and the rest of 25% comes from electricity.

Air Source Heat Pumps with Full Inverter Technology - Experience the luxury of total comfort with our new range of Poolex, energy efficient air source heat pumps designed for swimming pool and hot tubs. Never let the British weather control your swimming pool or hot tub enjoyment again. Pool and Hot Tub heaters provide the ultimate in spa water comfort letting you choose the perfect temperature all year round.


Handcrafted BaltoScandia Wood Fired Hot Tubs

Peaceful, natural relaxation can be yours every day with a wood-fired hot tub. Wood fired bathing in a hot tub creates the most elemental and authentic outdoor bathing experience. If you’ve ever soaked in water heated only by wood, you’ll know it's much richer than just the bathing: it's the splitting and stacking of firewood, the methodical stirring and preparation of the water, the sound of the crackling fire, the anticipation of the heat.

Traditional Wood Fired Hot Tubs

Choose the very best from our range of traditional Scandinavian wood fired hot tubs that have been designed to be simple and timeless with an elemental everlasting design.

Fiberglass Wood Fired Hot Tubs

Choose from our exclusive premium collection of BaltoScandia eco-friendly handcrafted luxury fiberglass wood fired hot tubs with Scandinavian Thermowood cladding.

Stainless Steel Wood Fired Hot Tubs

View our beautifully UK designed stainless steel wood fired hot tubs. Our range of Stainless-steel hot tubs are eco-friendly in the environment and green by their nature

Plunge Ice Cold Tubs

Cold water and ice therapy with our plunge tub. After enjoying the hot tub or sauna, many bathers will quickly cool themselves down by getting into a cold plunge pool or ice bath.

Read our Blogs on Wood Fired Hot Tubs & Ice Tubs

There are a number of great health benefits to soaking in a wood fired hot tub in all sessions, such as stress relief, muscle relaxation, improve sleep, pain relief, calorie burn and much, much more - our team of hot tub experts have put together informative blogs all relating to wood fired hot tubs and cold tubs for you to read and enjoy.


Handcrafted BaltoScandia Garden Saunas

Our new and exclusive range of Electric and wood fired BaltoScandia outdoor saunas are specially crafted from Nordic Thermowood and Canadian Red Cedar (Holls by BaltoScandia only) which radiates warmth and gives them a natural and authentic feel to make them truly inviting to step into and relax. We have the most popular outdoor garden sauna styles and shapes for you to offer. Starting from traditional barrel saunas, sauna cubes, sauna cabins to many variations of modern saunas.

Traditional Scandinavian Sauna Barrels

BaltoScandia produces more than 15 models of outdoor saunas barrels with different shapes and sizes. Each model has a unique inside layout for the most efficient space usage.

Nordic Garden Sauna Cubes

Embrace the Nordic wellness culture with our luxury range of outdoor saunas cubes that encapsulate pure, clean, modern design, powered by dedication and craftmanship.

Sauna Cabins made from thick spruce logs

Our sauna cabins provide a haven of tranquillity and place to unwind. This sauna cabin is constructed of solid, thick spruce log sections that are profiled for a precise fit.

Oval Saunas

The oval sauna models have been carefully designed with the sauna barrel in mind by increasing the inner volume to allow a steam room and a wellbeing chill zone for you to relax.

Holls by BaltoScandia

Explore our exclusive range of Holl's by BaltoScandia Outdoor Garden Sauna Collection. Let yourself be transported by the beautiful Canadian red cedar wood and its distinctive smell.

Sauna Accessories

BaltoScandia sauna accessories for any sauna; buckets, ladles, oils, sand timers, thermometers, headrests, birch brooms and much more. Make your sauna sleek & stylish with our range of accessories.


Outdoor Living Premium Range

As our company has grown so has our passion to create amazing outdoor spaces. Whatever style garden you have, large or small, you want it to be a place that you can relax in, and escape to. As well as the obvious perks of getting more fresh air and sunlight, there are lots of other benefits of an ideal outdoor living spaces.

Creating an outdoor living space will provide an additional space in your home to relax and unwind. Expand the space that you already have available to you. A casual living space in the garden is also the perfect place to entertain guests, to provide seating, and mingling space to enjoy evening drinks or a BBQ. Create a functional and enjoyable area for you and your family to use in the garden, whatever the weather.

BaltoScandia is a family-owned company founded with a clear objective: to create and design a premium line of Scandinavian designed outdoor living products like no other. There collection of premium Scandinavian designed cosy BBQ huts, grill cabins, glamping pods, glamping cubes, sauna cabins, sauna barrels and hot tub enclosures are all designed for private, and business uses.

Alfa Forni Pizza Ovens - Everybody Loves Restaurant Quality Pizza. Now You Can Enjoy it at Home with an Alfa Oven! Turning a traditional tool like an oven into a designer object acclaimed all over the world as a standard-bearer for “Made in Italy” and high-quality has always been the mission of the Alfa family. That is why Alfa ovens are conceived and designed as professional ovens that guarantee excellent results in baking pizza, bread and then some combined with unparalleled ease of use and maintenance.

The story of RB73 is a story of passion for fire. But also of beautiful and timeless products. Handmade by professionals with love for the product. Enjoy beautiful moments, enjoy staying outside! Think of warm summer evenings, but also throughout the rest of the year there are often beautiful days when an outdoor fireplace can be used to give that wonderful extra warmth and atmosphere on your terrace. The fires have glass fronted doors, so you do not suffer from smoke, ash or sparks on the terrace.

Contact Us

Address: Thornhome House, Yieldshields, Carluke, South Lanarkshire, Scotland, ML8 4QD

Telephone: 0800 112 3886 or 01555 729 607


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