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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,544 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceChêne-BourgAmbrosio SA
Ambrosio SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Ambrosio SA consists of the installation and maintenance of heating systems, including heat pumps, photovoltaic panels and other heating systems, as well as providing services for water treatment, including cleaning and descaling.

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Products & services

Industry:Building MaintenanceSpecialized Construction Installations
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Ambrosio SA

✓ Offered7
Heating installations
Heating installations for new construction and renovation, all energy types, oil and gas boilers, heat pumps, solar heating, underfloor heating, radiators.
Maintenance of heating installations
Maintenance 7 days a week, monitoring of boiler rooms in apartment buildings and villas, 24/7 assistance, maintenance contracts tailored to requirements.
Heat pumps
Professional installation of heat pumps, advice on the suitable model, commissioning, maintenance and replacement for renovation or new construction.
Photovoltaic panels
Installation and maintenance of photovoltaic panels, advice on panel selection, regular monitoring and preventive maintenance to optimise solar power production.
Water heaters
Detection and maintenance of water heaters, periodic descaling, inspection of the magnesium anode for enamelled cylinders, maintaining performance and service life.
Water treatment
Water treatment for the heating circuit, chemical flushing, anti-limescale filters, household, semi-industrial and industrial water softeners, non-electric volumetric solutions.
Technical studies for heating and sanitary
Needs assessment studies and technical advice for heating and sanitary installations, renovation or new system, with support through to commissioning.
Trust & reputation

ranQ Trust Score of Ambrosio SA: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Ambrosio SA scores 66.1 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.73.324%
  • 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.45.610%
  • 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.70.08%
Ambrosio SA scores 85.5 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.55.07%
Ambrosio 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%
Ambrosio SA scores 20.0 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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ambrosio SA reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.8 out of 5 stars from 5 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
4.8
of 5

Aggregated from 5 reviews across all connected sources

Sources
GGoogle4.85
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Route de Jussy 2
1225 Chêne-Bourg
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-108.004.723
Founded
1992 · 34 years
Last commercial register change
October 26, 2021
Employees
1 to 10
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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