NDS Engineering Launches 'My Löyly System,' a Retrofittable Löyly Control System for Existing Saunas
NDS Engineering Co., Ltd. has begun accepting orders for 'My Löyly System,' a löyly control system that can be retrofitted to existing saunas. This system automatically controls water pouring onto sauna stones and air blowing by a blower, providing a stable sauna experience by suppressing uneven steam distribution and perceived temperature variations, thereby enhancing the value of experiences at hot spring facilities, hotels, and spas.
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- 📰 Published: May 7, 2026 at 17:00
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NDS Engineering Co., Ltd. has started accepting orders for 'My Löyly System,' a löyly control system that can be retrofitted to existing saunas. This system automatically controls water pouring onto sauna stones and air blowing by a blower, suppressing uneven steam distribution and perceived temperature variations, thereby achieving a stable sauna experience. Since it can be retrofitted with minimal major renovations depending on the conditions of existing facilities, it can be utilized to enhance the experiential value at hot spring facilities, hotels, spas, private saunas, and more.
Development Background
With the recent expansion of the sauna market, the criteria for choosing a facility have shifted from 'the presence of a sauna' to 'the quality of the experience.' In particular, the quality of löyly and heat wave experiences significantly impacts user satisfaction.
However, many existing saunas face the following challenges:
・Steam does not easily spread throughout the room after löyly
・Perceived temperature tends to be uneven
・High operational burden for heat wave events
・Difficulty in differentiation with existing facilities
・Load on the sauna stove due to excessive water pouring
To address these issues, the system was developed to achieve a more stable löyly experience by simultaneously controlling steam generation and diffusion.
My Löyly System
■ Solution: Achieves a 'reproducible steam experience' with consistent volume and intervals
The My Löyly System controls the water discharge time by a pump, maintaining a consistent water volume and interval during löyly, thereby achieving a reproducible steam experience.
With traditional manual löyly, the water volume varied among users, leading to differences in steam generation and heater load. This system optimizes water volume and intervals with second-by-second control, creating a stable löyly environment.
■ Differences from manual löyly (reproducibility, equipment load management, operability)
Compared to manual löyly, the My Löyly System has the following differences:
・Water volume: Individual differences → Standardized by second-by-second control
・Steam: Single burst → Sustained with small amounts multiple times
・Heater load: Unstable → Protected by upper limit management
・Operation: User-dependent → Manageable by facility side
■ Technical Point: Small amount, multiple times control
This system adopts a design that pours a small amount of water multiple times, rather than a large amount at once.
For example, by supplying approximately 7mL to 14mL of water multiple times with a water flow time of 0.5 to 1 second, it simultaneously achieves:
・Improved steam persistence
・Stabilized perceived temperature
・Reduced load on the heater
Even with the same total water volume, the experience changes significantly depending on whether it's 'poured all at once' or 'divided into multiple times.' It has been confirmed that for small saunas, small amounts multiple times lead to a greater sense of sustained steam.
Features of My Löyly System
■ Experience design combining steam and wind
In addition to steam generation by löyly, the blower circulates steam throughout the sauna room, reducing perceived temperature variations. This provides a uniform and sustained löyly experience.
■ Retrofittable installation
It supports installation in existing sauna rooms and is characterized by its ability to be introduced without major renovations. It can enhance experiential value while utilizing existing facilities.
■ Stable operation through automatic control
By controlling water injection volume, intervals, and air blowing timing, a stable löyly environment is maintained. This allows for a consistent experience even when a heat wave master is not present.
Introduction Benefits (for facility operators)
・Improved customer satisfaction (standardization of experience quality)
・Operation possible without relying on heat wave events
・Differentiation from existing facilities
・Reduced equipment load (prevention of excessive water injection)
For those concerned about the feasibility of installation/retrofitting
If you have any concerns, such as retrofitting to existing saunas or checking installation conditions, you can consult for free at Sauna no Madoguchi.
Free consultation here
Anticipated Introduction
▶Hot spring facilities
Suppresses variations in löyly, always providing a stable heat environment. Standardizes experience quality even during peak times.
▶Sauna facilities (specialty stores)
Strengthens the 'totonoi experience' with auto-löyly x blower production, enhancing differentiation and repeat rates from other stores.
▶Hotels/Ryokans
Introduced as added value for guests, improving satisfaction during their stay. Provides high-quality experiences without requiring human effort.
▶Glamping facilities
Enhances the sauna experience combined with the natural environment. Increases buzz and contributes to SNS spread and customer attraction.
▶Rental villas/Private accommodations
Increases the value of properties 'with a sauna,' contributing to higher unit prices and occupancy rates.
▶Private saunas
Assists stable löyly operation based on conditions set by the facility, reducing operational burden.
▶Facilities with existing auto-löyly equipment
Improves control precision through retrofitting, optimizing water volume and timing to improve perceived temperature variations.
*Installation costs vary depending on the size of the sauna room, existing equipment, and control content. For details,
Keywords:
Development Background
With the recent expansion of the sauna market, the criteria for choosing a facility have shifted from 'the presence of a sauna' to 'the quality of the experience.' In particular, the quality of löyly and heat wave experiences significantly impacts user satisfaction.
However, many existing saunas face the following challenges:
・Steam does not easily spread throughout the room after löyly
・Perceived temperature tends to be uneven
・High operational burden for heat wave events
・Difficulty in differentiation with existing facilities
・Load on the sauna stove due to excessive water pouring
To address these issues, the system was developed to achieve a more stable löyly experience by simultaneously controlling steam generation and diffusion.
My Löyly System
■ Solution: Achieves a 'reproducible steam experience' with consistent volume and intervals
The My Löyly System controls the water discharge time by a pump, maintaining a consistent water volume and interval during löyly, thereby achieving a reproducible steam experience.
With traditional manual löyly, the water volume varied among users, leading to differences in steam generation and heater load. This system optimizes water volume and intervals with second-by-second control, creating a stable löyly environment.
■ Differences from manual löyly (reproducibility, equipment load management, operability)
Compared to manual löyly, the My Löyly System has the following differences:
・Water volume: Individual differences → Standardized by second-by-second control
・Steam: Single burst → Sustained with small amounts multiple times
・Heater load: Unstable → Protected by upper limit management
・Operation: User-dependent → Manageable by facility side
■ Technical Point: Small amount, multiple times control
This system adopts a design that pours a small amount of water multiple times, rather than a large amount at once.
For example, by supplying approximately 7mL to 14mL of water multiple times with a water flow time of 0.5 to 1 second, it simultaneously achieves:
・Improved steam persistence
・Stabilized perceived temperature
・Reduced load on the heater
Even with the same total water volume, the experience changes significantly depending on whether it's 'poured all at once' or 'divided into multiple times.' It has been confirmed that for small saunas, small amounts multiple times lead to a greater sense of sustained steam.
Features of My Löyly System
■ Experience design combining steam and wind
In addition to steam generation by löyly, the blower circulates steam throughout the sauna room, reducing perceived temperature variations. This provides a uniform and sustained löyly experience.
■ Retrofittable installation
It supports installation in existing sauna rooms and is characterized by its ability to be introduced without major renovations. It can enhance experiential value while utilizing existing facilities.
■ Stable operation through automatic control
By controlling water injection volume, intervals, and air blowing timing, a stable löyly environment is maintained. This allows for a consistent experience even when a heat wave master is not present.
Introduction Benefits (for facility operators)
・Improved customer satisfaction (standardization of experience quality)
・Operation possible without relying on heat wave events
・Differentiation from existing facilities
・Reduced equipment load (prevention of excessive water injection)
For those concerned about the feasibility of installation/retrofitting
If you have any concerns, such as retrofitting to existing saunas or checking installation conditions, you can consult for free at Sauna no Madoguchi.
Free consultation here
Anticipated Introduction
▶Hot spring facilities
Suppresses variations in löyly, always providing a stable heat environment. Standardizes experience quality even during peak times.
▶Sauna facilities (specialty stores)
Strengthens the 'totonoi experience' with auto-löyly x blower production, enhancing differentiation and repeat rates from other stores.
▶Hotels/Ryokans
Introduced as added value for guests, improving satisfaction during their stay. Provides high-quality experiences without requiring human effort.
▶Glamping facilities
Enhances the sauna experience combined with the natural environment. Increases buzz and contributes to SNS spread and customer attraction.
▶Rental villas/Private accommodations
Increases the value of properties 'with a sauna,' contributing to higher unit prices and occupancy rates.
▶Private saunas
Assists stable löyly operation based on conditions set by the facility, reducing operational burden.
▶Facilities with existing auto-löyly equipment
Improves control precision through retrofitting, optimizing water volume and timing to improve perceived temperature variations.
*Installation costs vary depending on the size of the sauna room, existing equipment, and control content. For details,
Keywords: