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NEWS
GWI unveils latest edition of Hydrothermal Spa & Wellness Development Standards to elevate industry practices
POSTED 28 May 2024 . BY Megan Whitby
Focused on thermal experiences and wet areas, the publication was sponsored by Accor and Hilton Credit: Shutterstock/PH888

Credit: GWI
When implemented correctly, hydrothermal experiences play a key role in programming, offering proven wellness benefits
– Susie Ellis
The GWI has released a 230-page guide to help set industry standards for thermal and wet area design
Realised with the expertise of GWI Hydrothermal Initiative members, it offers crucial information for planning, building and understanding hydrothermal spaces.
Sponsored by Accor and Hilton, the guide is available for free download
The 2024 publication marks the fourth edition of the Hydrothermal Spa & Wellness Development Standards
The Global Wellness Institute (GWI) has published the fourth edition of the Guide to Hydrothermal Spa & Wellness Development Standards

The 230-page guide, developed in collaboration with the GWI Hydrothermal Initiative* members, continues to set the industry standard for designing and constructing thermal experiences and wet areas in commercial and residential properties.

Originally published in 2014, the publication is designed to help stakeholders – including owners, operators and consultants – understand the complexity of these spaces.

Regardless of the size and scope of a project, the manual guides readers through everything from project planning to building and construction considerations, including recommended standards and materials, while clearly defining the functions and benefits of common thermal bathing and wet area experiences and treatments, both communal and private.

“I’ve long been convinced that, when implemented correctly, hydrothermal experiences play a key role in wellness programming, offering proven wellness benefits that are difficult to achieve any other way,” said Susie Ellis, GWI’s CEO and co-founder.

“Available for free download, the fourth edition of this resource has been updated and expanded, and includes crucial information to help anyone embarking on this type of build, whether for a home, spa, bathhouse or fitness centre.”

"Our main goal with this resource has been to provide information readers can’t find elsewhere,” said Don Genders, chair of the GWI Hydrothermal Initiative and CEO of Design for Leisure.

“This book is the result of a unique collaboration between experts, written to enable readers to walk away with a clear understanding of how hydrothermal areas should be designed and constructed, while also providing historical references, wellness benefits, practical tips, and even common building mistakes – all in an effort to elevate industry standards and encourage builds that are both high quality and sustainable."

In addition to the support from Hydrothermal Initiative members, sponsorship was provided by Accor and Hilton.

*About the GWI Hydrothermal Initiative
The GWI Hydrothermal Initiative aims to increase transparency and awareness in the design and implementation of all elements of spas and wellness facilities involving thermal and wet treatments.

The initiative is supported by its member companies including Barr & Wray, Design for Leisure, Dornbracht, Gharieni Group, HygroMatik, Kemitron, KLAFS, Lux Elements, SnowBox, Sommerhuber, TechnoAlpin Indoor, Unbescheiden and WDT.
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Uniting the world of spa & wellness
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News   Products   Magazine   Subscribe
NEWS
GWI unveils latest edition of Hydrothermal Spa & Wellness Development Standards to elevate industry practices
POSTED 28 May 2024 . BY Megan Whitby
Focused on thermal experiences and wet areas, the publication was sponsored by Accor and Hilton Credit: Shutterstock/PH888
Credit: GWI
When implemented correctly, hydrothermal experiences play a key role in programming, offering proven wellness benefits
– Susie Ellis
The GWI has released a 230-page guide to help set industry standards for thermal and wet area design
Realised with the expertise of GWI Hydrothermal Initiative members, it offers crucial information for planning, building and understanding hydrothermal spaces.
Sponsored by Accor and Hilton, the guide is available for free download
The 2024 publication marks the fourth edition of the Hydrothermal Spa & Wellness Development Standards
The Global Wellness Institute (GWI) has published the fourth edition of the Guide to Hydrothermal Spa & Wellness Development Standards

The 230-page guide, developed in collaboration with the GWI Hydrothermal Initiative* members, continues to set the industry standard for designing and constructing thermal experiences and wet areas in commercial and residential properties.

Originally published in 2014, the publication is designed to help stakeholders – including owners, operators and consultants – understand the complexity of these spaces.

Regardless of the size and scope of a project, the manual guides readers through everything from project planning to building and construction considerations, including recommended standards and materials, while clearly defining the functions and benefits of common thermal bathing and wet area experiences and treatments, both communal and private.

“I’ve long been convinced that, when implemented correctly, hydrothermal experiences play a key role in wellness programming, offering proven wellness benefits that are difficult to achieve any other way,” said Susie Ellis, GWI’s CEO and co-founder.

“Available for free download, the fourth edition of this resource has been updated and expanded, and includes crucial information to help anyone embarking on this type of build, whether for a home, spa, bathhouse or fitness centre.”

"Our main goal with this resource has been to provide information readers can’t find elsewhere,” said Don Genders, chair of the GWI Hydrothermal Initiative and CEO of Design for Leisure.

“This book is the result of a unique collaboration between experts, written to enable readers to walk away with a clear understanding of how hydrothermal areas should be designed and constructed, while also providing historical references, wellness benefits, practical tips, and even common building mistakes – all in an effort to elevate industry standards and encourage builds that are both high quality and sustainable."

In addition to the support from Hydrothermal Initiative members, sponsorship was provided by Accor and Hilton.

*About the GWI Hydrothermal Initiative
The GWI Hydrothermal Initiative aims to increase transparency and awareness in the design and implementation of all elements of spas and wellness facilities involving thermal and wet treatments.

The initiative is supported by its member companies including Barr & Wray, Design for Leisure, Dornbracht, Gharieni Group, HygroMatik, Kemitron, KLAFS, Lux Elements, SnowBox, Sommerhuber, TechnoAlpin Indoor, Unbescheiden and WDT.
RELATED STORIES
US named world’s largest wellness economy, reaching US$1.8 trillion valuation


The Global Wellness Institute (GWI) has released new data on the US’ wellness economy, valuing it at US$1.8 trillion.
GWI’s new Wellness Policy Toolkit proposes shift from wellness tourism to ‘wellness in tourism’


Industry research organisation, the Global Wellness Institute (GWI), has announced the release of a new report called Wellness Policy Toolkit: Wellness in Tourism.
New GWI study unveils global wellness market leaders: US, China and Germany


The US, China, Germany, Japan and the UK have been identified as the world’s five largest wellness markets in new research released today by the Global Wellness Institute (GWI).
FEATURE: News report: Peak performance


Fresh research shows the global wellness economy is now worth US$5.6 trillion
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The Good Spa Guide sets up event for modified Good Spa Guide Awards
The UK spa review and discovery platform for consumers, the Good Spa Guide, has announced it will host the Good Spa Guide Awards 2026 during an event on 16 November at Sopwell House Hotel in St Albans, UK.
McKinsey: 84 per cent of consumers say wellness is a top priority
Eighty-four per cent of consumers now say wellness is a top priority in their lives, with this percentage increasing year on year, according to a preview presentation of McKinsey’s Future of Wellness 2026 research report.
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Le Atelier by C.O.D.E. doesn't offer a standard bespoke service, it provides a highly customised approach to designing massage beds and loungers in high-end wellness environments. [more...]

Embrace the chill: TechnoAlpin's Snowsky revolutionises post-fitness recovery with falling snow
In the fast-paced world of fitness and wellness, where high-intensity workouts push us to our limits and the sweat pours, the importance of efficient recovery cannot be overstated. [more...]
+ More featured suppliers  
COMPANY PROFILES
Yon-Ka

As pioneers in aromatherapy since 1954 and founders of the Yon-Ka brand, the Multaler Laboratories, [more...]
+ More profiles  
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+ More catalogues  

DIRECTORY
+ More directory  
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21-23 Jun 2026

Spa Life International (UK)

Midlands (Venue TBA), Liphook, United Kingdom
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World Bathing Day

Worldwide,
+ More diary  
 


ADVERTISE . CONTACT US

Leisure Media
Tel: +44 (0)1462 431385

©Cybertrek 2026

ABOUT LEISURE MEDIA
LEISURE MEDIA MAGAZINES
LEISURE MEDIA HANDBOOKS
LEISURE MEDIA WEBSITES
LEISURE MEDIA PRODUCT SEARCH
PRINT SUBSCRIPTIONS
FREE DIGITAL SUBSCRIPTIONS