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 42.1 (raw 31.8 of 100), calibrated so the best hotel in this edition (Santa Monica Proper Hotel) reads 90. Evidence retrieved 2026-10-22.
Sleep8.8 / 24
The room as an instrument for deep, uninterrupted, circadian-aligned rest.
Mattress & sleep system
Hotel-reported · in the best room
FreshBed climate-controlled, air-ventilated beds in two suites.
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-quality programme; blue-filter glasses and smart 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
Blue-light-reduced lighting and screens.
In-room red light
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Acoustic quiet
Not yet reviewed · in the best room
Unknown. We have asked the hotel.
0.0 / 4 pts
Unknown
EMF & Wi-Fi-off options
Hotel-reported · in the best room
Electrosmog switch/filter in every room cuts Wi-Fi and electrosmog with one click.
Air2.0 / 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
Hotel-reported · across the property
Fresh-air ventilation with cross-flow heat exchanger; DGNB criteria.
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.
Nourishment7.0 / 10
Food and drink that heal rather than merely please.
Organic & local sourcing
Hotel-reported · across the property
All food certified organic, local where possible.
Clean-ingredient standard
Hotel-reported · across the property
Nutrition and fasting medicine (LANS Med).
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 medicine specialists.
Movement2.0 / 10
The means to train, stretch and move, indoors and out.
Gym completeness
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 4 pts
Unknown
Classes & studios
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 3 pts
Unknown
Swimming
Hotel-reported · across the property
Pool.
Outdoor activity
Hotel-reported · across the property
Complimentary e-bikes.
Holistic Wellness5.0 / 19
Healing traditions and the recovery technology that complements them.
Spa facility
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 3 pts
Unknown
Traditional & integrative modalities
Hotel-reported · across the property
Naturopathy and acupuncture.
Mind & breath
Hotel-reported · across the property
Sport & Meditation programme.
Heat therapy
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Cold therapy
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Photobiomodulation & PEMF
Not yet reviewed · across the property
Unknown. We have asked the hotel.
0.0 / 2 pts
Unknown
Clinical longevity (IV, HBOT, diagnostics)
Hotel-reported · across the property
High-tech diagnostics on site.
Materials & Setting7.0 / 13
What touches the skin and surrounds the stay: finishes, products, cleaning, and the landscape beyond the door.
Natural, low-VOC finishes
Hotel-reported · in the best room
Only building-biologist-approved, emission-free materials; wood and natural paints.
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
Hotel-reported · across the property
'Green Cleaning Concept': 100% ecological dry micro-steam cleaning, no chemical agents.
Green & blue space
Hotel-reported · across the property
Enea-designed gardens and planted roofs.
Walkability & low-impact mobility
Hotel-reported · across the property
Mostly electric transfers; free e-bikes.
Our review
At a glance
- Fragrance
- 5 not yet reviewed
- Air
- 1 hotel-reported, 1 not met, 3 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
- 1 hotel-reported, 1 not yet reviewed
- Building
- 3 not yet reviewed
Two reported by the hotel; one not met; the rest not yet reviewed.
2 hotel-reported1 not met22 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.
So far, a 2018 report says: In 2018 the trade press reported that nights at Lanserhof are ‘completed with biological aromatherapy by Nacht’.
Our note. The article does not say whether scent is used in guest rooms, and it is several years old. Ask whether aromatherapy is part of the evening routine and decline it if you prefer.
How we know
What we look for. No air fresheners, plug-ins, room sprays or diffusers used in guest rooms.
Why it matters. In a US population survey, about a third of adults reported health problems, such as migraine and breathing difficulty, from fragranced products. Terpenes in many fragrances also react with indoor ozone to form fine particles and formaldehyde.
Sources: Steinemann, Air Quality, Atmosphere & Health, Fragranced consumer products: exposures and effects from emissions (); Nazaroff & Weschler, Atmospheric Environment, Cleaning products and air fresheners: exposure to primary and secondary air pollutants ()
Source 1: Well Home: Lanserhof Tegernsee sleep programme6 Dec 2018 · read 22 Oct 2026
No scent marketing
Not yet reviewed.
Fragrance-free laundry
Not yet reviewed.
Unscented bath products
Not yet reviewed.
Unscented spa options
Not yet reviewed.
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: Every room and suite listed has a balcony-terrace, and the Pavillon Suite a roof terrace.
Our note. We read a terrace as a door that opens to outside air.
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 website: rooms and suitesUndated · read 22 Oct 2026
Filtered fresh air
Not yet reviewed.
So far, the hotel said in 2022: Lanserhof says a cross-flow heat exchanger uses the exhaust air to warm the incoming fresh air, so the air stays fresh without wasting energy.
Our note. Filter ratings are not stated, so this falls short of the criterion.
How we know
What we look for. Mechanical ventilation brings outdoor air in through filters rated MERV 13 or better.
Why it matters. Fine particles (PM2.5) are linked to respiratory and cardiovascular harm. A MERV 13 filter captures at least half of the smallest particles it is rated for and most larger ones, and a steady supply of fresh air dilutes pollutants released indoors.
Source: US EPA, What is a MERV rating? ()
Source 3: Lanserhof press release: sustainability (German)9 Mar 2022 · read 22 Oct 2026
In-room air purifier
Not yet reviewed.
No in-room combustion
Not metin some rooms or areas
The hotel says: The Elysium Duo Suite lists a living room ‘with open fireplace’; the Elysium Loft, Infinitas and Somnium suites list one too.
Our note. The fuel is not stated. The Pavillon Suite lists a steam fireplace. The Double Room, Parvus and Symphonia suites list no fireplace; book one of those if this matters to you.
How we know
What we look for. No gas fireplaces, candles or incense in guest rooms.
Why it matters. In homes with gas appliances, the US EPA notes that indoor nitrogen dioxide often exceeds outdoor levels, and that it irritates the eyes, nose, throat and airways. Candles and incense burn in the same small, closed room.
Source: US EPA, Nitrogen dioxide’s impact on indoor air quality ()
Source 4: Hotel website: Elysium Duo SuiteUndated · read 22 Oct 2026
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.
So far, the hotel said in 2022: Lanserhof follows a ‘Green Cleaning Concept’ of fully ecological cleaning with dry micro-steam and no chemical cleaning agents.
Our note. This is a group-wide statement from 2022. No product list is published, so this falls short of the criterion. Ask what is used for disinfection.
How we know
What we look for. Unscented, low-hazard cleaning products and no aerosols, with a product list the hotel will share.
Why it matters. In a ten-country study, weekly use of household cleaning sprays was linked to new asthma symptoms in adults. Residue and scent from cleaning also linger for the next guest.
Source: Zock et al., American Journal of Respiratory and Critical Care Medicine, The use of household cleaning sprays and adult asthma: an international longitudinal study ()
Source 3: Lanserhof press release: sustainability (German)9 Mar 2022 · read 22 Oct 2026
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.
Mattress materials disclosed
Not yet reviewed.
So far, a 2018 report says: In 2018 two suites were reported to have FreshBeds, with a silent unit in the base that filters surrounding air and delivers it through the mattress.
Our note. Mattress materials and flame-retardancy are not stated.
How we know
What we look for. The hotel says what its mattresses are made of and how flame-retardancy is achieved.
Why it matters. Flame retardants have been added to mattresses and seating foam, and the US National Institute of Environmental Health Sciences lists possible effects including endocrine and thyroid disruption. How much a mattress adds to anyone’s exposure is still debated; disclosure lets guests choose.
Source: US National Institute of Environmental Health Sciences, Flame retardants (undated)
Source 1: Well Home: Lanserhof Tegernsee sleep programme6 Dec 2018 · read 22 Oct 2026
Hard floors
Hotel-reportedonly some rooms or areas
The hotel says: The pages for the Double Room and the Elysium Duo, Elysium Loft, Infinitas, Parvus, Somnium and Symphonia suites each list parquet.
Our note. The Pavillon Suite page does not mention its floors.
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 website: rooms and suitesUndated · read 22 Oct 2026
Allergy-friendly rooms
Not yet reviewed.
Pet-free rooms
Not yet reviewed.
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 said in 2022: Lanserhof says it cleans its pool water with its own ultrafiltration system.
Our note. Whether the pool is indoors, how it is ventilated and whether combined chlorine is monitored are not stated.
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 3: Lanserhof press release: sustainability (German)9 Mar 2022 · 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 said in 2022: ‘All our food is certified organic’, sourced from local suppliers where possible, with vegan options chosen where possible.
Our note. This is a group-wide statement from 2022.
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 3: Lanserhof press release: sustainability (German)9 Mar 2022 · 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 project architect lists: Sliding shutters with fine wooden louvres give the loggias privacy and solar shading; Müller-BBM advised on acoustics.
Our note. Blackout and sound insulation in the bedrooms 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 5: Christoph Ingenhoven Architects: project pageUndated · read 22 Oct 2026
Radio-quiet options
Hotel-reportedacross the property
The hotel says: The Double Room and every suite page list an ‘electrosmog switch’ or ‘electrosmog filter’. In 2018 the trade press described it as a button that switches off the room’s Wi-Fi with one click.
Our note. Listed as an amenity, not a health benefit.
Shown for information; not scored.
How we know
What we look for. Wi-Fi that can be switched off in the room, or a wired connection. Listed as an amenity only.
Why it matters. Some guests prefer lower radio exposure. The WHO says current evidence does not confirm any health effects from low-level electromagnetic fields, so we list these options as amenities, not as health benefits.
Source: World Health Organization, Radiation: electromagnetic fields ()
Source 6: Hotel website: Double RoomUndated · read 22 Oct 2026
Not part of any health score. Shown as an amenity at the guest’s preference.
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 said in 2022: Lanserhof says it uses only emission-free materials approved by building biologists, with a focus on wood and natural paints.
Our note. Adhesives and flooring are not described one by one, so this falls short of the criterion.
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 3: Lanserhof press release: sustainability (German)9 Mar 2022 · read 22 Oct 2026
Leak and mold response
Not yet reviewed.
Building certification
Not yet reviewed.
So far, the project architect lists: The architects say all choices were made according to the criteria of the German Sustainable Building Council (DGNB), with Baubiologie Maes as building-biology consultant.
Our note. Working to DGNB criteria is not the same as holding a DGNB certificate, and we have not found one.
Shown for information; not scored.
How we know
What we look for. A third-party certification such as WELL, LEED or a green business program, recorded with its level, and its year where the certifier gives one.
Why it matters. WELL assesses air, water and light in occupied buildings. LEED and green business programs are mainly environmental, with some indoor-quality elements. A certificate records what was designed or checked at a point in time, not what a room is like today.
Source 5: Christoph Ingenhoven Architects: project pageUndated · read 22 Oct 2026
Context only. A certificate supports specific criteria only where its scope covers them.
Know something about building here that we don’t? Tell us
Notes & sources
- Well Home: Lanserhof Tegernsee sleep programme, 6 Dec 2018 · read 22 Oct 2026
- Hotel website: rooms and suites, Undated · read 22 Oct 2026
- Lanserhof press release: sustainability (German), 9 Mar 2022 · read 22 Oct 2026
- Hotel website: Elysium Duo Suite, Undated · read 22 Oct 2026
- Christoph Ingenhoven Architects: project page, Undated · read 22 Oct 2026
- Hotel website: Double Room, Undated · read 22 Oct 2026
- Hotel website: Tegernsee, Undated · read 22 Oct 2026
- Lanserhof website: Deep Sleep, Undated · read 22 Oct 2026
- Lanserhof website: Longevity Medicine, Undated · read 22 Oct 2026
- Lanserhof website: Classic Detox, Undated · read 22 Oct 2026
- Hotel website: Pavillon Suite, Undated · read 22 Oct 2026
Room count: Per the architects’ project page; the hotel’s own site does not give a total. Hotel website (opens the hotel’s website)
Photographs: Lanserhof Tegernsee; Lanserhof Tegernsee; Lanserhof Tegernsee; Lanserhof Tegernsee; Lanserhof Tegernsee; Lanserhof Tegernsee
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