The evidence
Each criterion with what we found, where we found it and when. Anything we could not confirm says so.
NTH criteria
NTH Framework v1.2. Score 55.6 (raw 42.0 of 100), calibrated so the best hotel in this edition (Santa Monica Proper Hotel) reads 90. Evidence retrieved 2026-10-22.
Sleep6.0 / 24
The room as an instrument for deep, uninterrupted, circadian-aligned rest.
Mattress & sleep system
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 5 pts
Unknown
Bedding & textiles
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 4 pts
Unknown
Sleep programme & pillow menu
Hotel-reported · in the best room
Sleep Cycles: medical sleep programme with Nanobionic linen and Dagsmejan sleepwear.
Blackout
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Circadian & warm evening lighting
Hotel-reported · in the best room
Self-programmable light and sound sequences in Sleep Rooms.
In-room red light
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Acoustic quiet
Hotel-reported · in the best room
Nature-sound transmission and acoustic ceiling panels; no soundproofing rating.
EMF & Wi-Fi-off options
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Air0.0 / 12
What you breathe for eight hours a night: filtered, fresh, smoke-free and unperfumed.
In-room purification
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 5 pts
Unknown
Ventilation & building standard
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 3 pts
Unknown
Smoke-free policy
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Fragrance-free & low-allergen rooms
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Water0.0 / 12
Clean water to drink, and to shower and bathe in.
Filtered drinking water
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 5 pts
Unknown
Shower & bath filtration
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 5 pts
Unknown
Gentler pool & hydrotherapy water
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Nourishment8.0 / 10
Food and drink that heal rather than merely please.
Organic & local sourcing
Hotel-reported · across the property
Fresh, non-processed, organic ingredients.
Clean-ingredient standard
Hotel-reported · across the property
Chenot Diet designed with nutritional scientists; plant-based, anti-inflammatory.
Clean minibar & in-room hydration
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Nutrition guidance
Hotel-reported · across the property
Nutritional consultations throughout the stay.
Movement8.0 / 10
The means to train, stretch and move, indoors and out.
Gym completeness
Hotel-reported · across the property
Extensive fitness area with metabolic and sports laboratory; equipment not named.
Classes & studios
Hotel-reported · across the property
Daily free group yoga, aqua therapy and stretching.
Swimming
Hotel-reported · across the property
Pool; private lakefront beach for swimming.
Outdoor activity
Hotel-reported · across the property
Guided walking and hiking tours; tennis.
Holistic Wellness17.0 / 19
Healing traditions and the recovery technology that complements them.
Spa facility
Hotel-reported · across the property
5,000 sq m medical spa; hammam, sauna.
Traditional & integrative modalities
Hotel-reported · across the property
Traditional Chinese medicine, acupuncture, osteopathy, bio-energetic medicine.
Mind & breath
Hotel-reported · across the property
Neuro-acoustic deep-relaxation treatments.
Heat therapy
Hotel-reported · across the property
Sauna and hammam.
Cold therapy
Hotel-reported · across the property
Whole-body cryochamber at -110°C.
Photobiomodulation & PEMF
Hotel-reported · across the property
Whole-body photobiomodulation (red and near-infrared).
Clinical longevity (IV, HBOT, diagnostics)
Hotel-reported · across the property
Advanced diagnostics, epigenetic profiling and an altitude (hypoxic) chamber.
Materials & Setting3.0 / 13
What touches the skin and surrounds the stay: finishes, products, cleaning, and the landscape beyond the door.
Natural, low-VOC finishes
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 3 pts
Unknown
Clean bath & body amenities
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Non-toxic spa & nail products
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Non-toxic housekeeping & plastic-free operations
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Green & blue space
Hotel-reported · across the property
Lakefront with private beach; Alpine views.
Walkability & low-impact mobility
Hotel-reported · across the property
Walk to Weggis and local hiking.
Our review
At a glance
- Fragrance
- 5 not yet reviewed
- Air
- 1 hotel-reported, 4 not yet reviewed
- Cleaning & care
- 4 not yet reviewed
- Sleep & materials
- 1 hotel-reported, 4 not yet reviewed
- Water & pools
- 4 not yet reviewed
- Food
- 1 hotel-reported, 1 not yet reviewed
- Light & quiet
- 2 not yet reviewed
- Building
- 3 not yet reviewed
Two reported by the hotel; the rest not yet reviewed.
2 hotel-reported23 of 25 not yet reviewed
Counts cover the 25 scored criteria; the other 5 windows are context.
Checked
Read the full profileThe ledger
Fragrance
Added scent is the most common complaint from sensitive guests, and the hardest thing to see on a booking page.
No added fragrance in rooms
Not yet reviewed.
No scent marketing
Not yet reviewed.
Fragrance-free laundry
Not yet reviewed.
Unscented bath products
Not yet reviewed.
Unscented spa options
Not yet reviewed.
So far, the hotel says: Programme treatments include hydro-aromatherapy baths with ‘the very best essential oils’ and a clay body wrap ‘enriched with minerals, microalgae and pure essential oils’.
Our note. Whether these can be given without essential oils, and whether the sauna and hammam use scent infusions, is not stated.
How we know
What we look for. Treatments, saunas and steam rooms available without essential oils or scent infusions.
Why it matters. Essential oils are fragrance: the EU’s scientific committee lists several natural extracts, as well as single fragrance chemicals, among established contact allergens. A shared sauna with a scent infusion is hard to avoid.
Source: EU Scientific Committee on Consumer Safety, Opinion on fragrance allergens in cosmetic products ()
Source 1: Hotel website: Sleep Cycles programmeUndated · read 22 Oct 2026
Know something about fragrance here that we don’t? Tell us
Air
What you breathe for eight hours a night: smoke history, fresh air, filtration and anything burning in the room.
Smoke-free property
Not yet reviewed.
Opening windows
Hotel-reportedacross the property
The hotel says: The rooms and suites ‘boast secluded balconies or terraces’, and room descriptions mention large window fronts, balconies and terraces.
How we know
What we look for. Guest rooms have windows or doors that open to outside air.
Why it matters. The US EPA lists opening windows, when outdoor air allows, as a way to dilute pollutants released indoors. An opening window lets guests air a room themselves when it smells of cleaning products or new furnishings.
Source: US EPA, Improving indoor air quality ()
Source 2: Hotel brochure (PDF)Undated · read 22 Oct 2026
Filtered fresh air
Not yet reviewed.
In-room air purifier
Not yet reviewed.
No in-room combustion
Not yet reviewed.
Know something about air here that we don’t? Tell us
Cleaning & care
How a room is cleaned, treated and prepared, and whether a request for a gentler clean is actually honored.
Low-chemical housekeeping
Not yet reviewed.
No ozone or biocide treatments
Not yet reviewed.
Low-chemical pest control
Not yet reviewed.
Sensitive-guest preparation
Not yet reviewed.
Know something about cleaning & care here that we don’t? Tell us
Sleep & materials
The textiles, mattress and floor you spend the night closest to, and how allergen-aware the room is.
Tested or organic bed linen
Not yet reviewed.
So far, the hotel says: Sleep Cycles guests sleep between Nanobionic bedsheets, which the hotel says contain minerals that emit far-infrared light, and wear Dagsmejan sleepwear.
Our note. No residue-testing or organic certification is named for the linen.
How we know
What we look for. Sheets and towels certified to a residue-testing standard such as OEKO-TEX Standard 100, or certified organic.
Why it matters. Certifications such as OEKO-TEX Standard 100 test the finished fabric, down to the thread, against a list of restricted substances, which lowers skin exposure over a night’s sleep.
Source: OEKO-TEX, OEKO-TEX Standard 100 (undated)
Source 1: Hotel website: Sleep Cycles programmeUndated · read 22 Oct 2026
Mattress materials disclosed
Not yet reviewed.
Hard floors
Hotel-reportedonly some rooms or areas
The hotel says: The Single Deluxe and Single Classic rooms have wooden floors.
Our note. Floors in the other room categories are not described; ask when you book.
How we know
What we look for. Hard, cleanable floors in guest rooms rather than wall-to-wall carpet.
Why it matters. Dust mites live in carpet, and US health guidance for allergic sleepers is to replace wall-to-wall carpet in bedrooms with bare floors, which can be cleaned completely between guests.
Source: US National Institute of Environmental Health Sciences, Dust mites and cockroaches (undated)
Source 2: Hotel brochure (PDF)Undated · read 22 Oct 2026
Allergy-friendly rooms
Not yet reviewed.
Pet-free rooms
Not yet reviewed.
So far, the hotel says: Only small dogs are allowed, one per room, in allocated Classic Rooms on the first floor of La Grande Maison, which have meadow access, no carpets and mandatory daily housekeeping. Dogs are kept out of the restaurant, tea lounge, spa, medical areas, pool and beach.
Our note. A separate cleaning routine for the rooms dogs never use is not described.
How we know
What we look for. Rooms or floors where animals are never allowed, cleaned to a separate routine.
Why it matters. Pet allergen can stay on carpets and furniture for months and travels on clothing. For allergic guests a room animals never enter matters more than any amenity.
Source: US National Institute of Environmental Health Sciences, Pet allergens (undated)
Source 3: Hotel website: FAQsUndated · read 22 Oct 2026
Know something about sleep & materials here that we don’t? Tell us
Water & pools
Drinking water, shower water and pool air.
Filtered or tested drinking water
Not yet reviewed.
Water safety plan
Not yet reviewed.
Shower filters
Not yet reviewed.
Shown for information; not scored.
Outdoor or low-chloramine pools
Not yet reviewed.
So far, the hotel says: There is a 21-metre indoor pool and private beach access on Lake Lucerne.
Our note. Pool ventilation and water treatment are not described.
Shown for information; not scored.
How we know
What we look for. Pools are outdoors, or indoor pools have dedicated ventilation and monitored combined chlorine.
Why it matters. Chloramines irritate the skin, eyes and airways, and they build up in the air of indoor pools without enough ventilation. Outdoor pools, and good ventilation for indoor ones, keep levels low.
Source: US CDC, Chloramines and pool operation ()
Source 2: Hotel brochure (PDF)Undated · read 22 Oct 2026
Context, not scored: almost every pool in this catalog is outdoors, so it says little about one hotel against another.
Know something about water & pools here that we don’t? Tell us
Food
Allergen care first; where the produce comes from second.
Allergen-aware kitchen
Not yet reviewed.
Garden or organic produce
Hotel-reportedacross the property
The hotel says: The Chenot Diet uses ‘fresh, wholesome, non-processed and organic ingredients’.
Our note. The share of organic produce, and any certification, is not given.
Shown for information; not scored.
How we know
What we look for. A meaningful share of the kitchen’s produce is grown on site or certified organic.
Why it matters. A large review found detectable pesticide residues about four times as often in conventional crops as in organic ones. Over a short stay the difference in exposure is small, so we show this as a note on the kitchen, not a scored health factor.
Source: Barański et al., British Journal of Nutrition, Higher antioxidant and lower cadmium concentrations and lower incidence of pesticide residues in organically grown crops: a systematic literature review and meta-analyses ()
Source 2: Hotel brochure (PDF)Undated · read 22 Oct 2026
Kitchen note, not scored.
Know something about food here that we don’t? Tell us
Light & quiet
Darkness and silence at night, and radio-quiet options for guests who want them.
Darkness and quiet
Not yet reviewed.
So far, the hotel says: The Sleep Rooms transmit the sound of nature into the room to mimic a natural acoustic environment, with self-programmable light and sound sequences.
Our note. Blackout shades and sound insulation are not described.
How we know
What we look for. Blackout shades and sound insulation that let the room become properly dark and quiet.
Why it matters. Night-time noise fragments sleep; the WHO’s night noise guidelines set a target of 40 dB outside the bedroom. A dark, quiet room is the simplest sleep aid there is.
Source: WHO Regional Office for Europe, Night noise guidelines for Europe ()
Source 1: Hotel website: Sleep Cycles programmeUndated · read 22 Oct 2026
Radio-quiet options
Not yet reviewed.
Shown for information; not scored.
Know something about light & quiet here that we don’t? Tell us
Building
The materials a hotel was built and renovated with, how it handles damp, and what third parties have certified.
Low-emitting materials
Not yet reviewed.
So far, the hotel says: ‘Natural and locally sourced materials were used for the new building’, and traditional Swiss building techniques were used in the original building.
Our note. Paints, adhesives, finishes and flooring are not named.
How we know
What we look for. Low-VOC paints, adhesives, finishes and flooring specified in construction or renovation.
Why it matters. Paints, varnishes and adhesives release volatile organic compounds, formaldehyde among them, most heavily when new. Low-emitting products reduce that load.
Source: US EPA, Volatile organic compounds’ impact on indoor air quality ()
Source 2: Hotel brochure (PDF)Undated · read 22 Oct 2026
Leak and mold response
Not yet reviewed.
Building certification
Not yet reviewed.
Shown for information; not scored.
Know something about building here that we don’t? Tell us
Notes & sources
- Hotel website: Sleep Cycles programme, Undated · read 22 Oct 2026
- Hotel brochure (PDF), Undated · read 22 Oct 2026
- Hotel website: FAQs, Undated · read 22 Oct 2026
- Hotel website: home page, Undated · read 22 Oct 2026
Room count: Per the hotel’s website. Hotel website (opens the hotel’s website)
Photographs: Chenot Palace Weggis; Chenot Palace Weggis; Chenot Palace Weggis; Chenot Palace Weggis; Chenot Palace Weggis; Chenot Palace Weggis; Chenot Palace Weggis
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