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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringEchandensH2O Léman SA
H2O Léman SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of H2O Leman SA consists of the installation, maintenance and repair of heating, ventilation, sanitary and air conditioning systems, including the planning and implementation of energy efficiency measures and the creation of energy balances. The company also offers services in the field of wastewater management and disposal.

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Products & services

Industry:Technical Consulting & EngineeringPlumbing & Building Services
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4.6/5

H2O Léman SA

✓ Offered4
Technical office & engineering
Technical office for designing projects in heating, plumbing and ventilation, including studies, technical plans for HVAC (heating, ventilation, sanitary), energy assessments and Minergie documentation.
New installation
New heating, ventilation and plumbing installations for new builds, with heat pumps, gas/oil/wood boilers, solar energy and simple or dual-flow ventilation.
Refurbishment
Refurbishment of heating and plumbing installations, in particular heat pumps, replacement of ageing systems, renovation of bathrooms and sanitary fixtures.
Maintenance & breakdown service
Maintenance and breakdown service for heating and plumbing installations, with maintenance contracts, rapid interventions, on-call service and technical support for heat pumps, boilers, solar and ventilation.
Trust & reputation

ranQ Trust Score of H2O Léman SA: 4.6 out of 5.0

Trust Score4.6/ 5.0

Excellent

x

Data basis 96% · As of October 2026

H2O Léman SA scores 96.1 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.93.124%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.100.010%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.100.08%
H2O Léman SA scores 89.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
H2O Léman SA scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
H2O Léman SA scores 17.1 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.17.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

H2O Léman SA reaches a ranQ Trust Score of 4.6 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.9 out of 5 stars from 147 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.9
of 5

Aggregated from 147 reviews across all connected sources

Sources
GGoogle4.9147
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Knowledge

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Comparisons

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Location

Rue des Artisans 10
1026 Echandens
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-284.266.817
Founded
2011 · 15 years
Last commercial register change
March 31, 2017
Employees
11 to 20
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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