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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesArni Agsie-tech sieber
sie-tech sieber Logo
Verified· 2 sourcesTrust Score
Summary

About the company

sie-tech sieber provides building services for heating, ventilation and air conditioning (HVAC), offering service, repair and maintenance of ventilation systems. The company also performs installation and commissioning of ventilation and smoke-extraction systems, provides technical advice and site supervision, airflow measurements, documentation and user training.

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Offering

Products & services

Industry:Plumbing & Building ServicesSpecialized Construction Installations
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sie-tech sieber

✓ Offered3
Installation of ventilation and smoke-extraction systems
Installation and assembly of ventilation and RWA systems, residential ventilation units, air-handling components and special ventilation structures; including commissioning, training and support.
Service and repair of ventilation systems
Service, maintenance and repair of ventilation systems; restoration, replacement and repair work, filter replacement, inspection and airflow measurement for various makes and equipment brands.
Consulting and technical support for ventilation, heating and refrigeration
Consulting and technical support for renovations and modifications of ventilation and heating systems, as well as technical construction management in the fields of ventilation, heating and refrigeration.
Trust & reputation

ranQ Trust Score of sie-tech sieber

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of October 2026

sie-tech sieber has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
sie-tech sieber scores 67.8 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.75.012%
  • 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%
sie-tech sieber scores 83.3 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).83.322%
sie-tech sieber scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of October 2026.

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

Knowledge

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Location

In den Reben 3
8905 Arni Ag

At a glance

Legal form
Sole proprietorship
UID
CHE-357.302.724
Founded
2019 · 7 years
Last commercial register change
May 24, 2019
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.
67.0
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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