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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringFlawilHARTMANN GESUNDE-UMWELT GmbH
HARTMANN GESUNDE-UMWELT GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of HGU (Hartmann Gesunde Umwelt GmbH) is consulting and planning energy-efficient and healthy buildings. This includes in particular: energy consulting and planning for building modernizations and new constructions, conception and implementation of energetic renovations and modernizations, planning and execution of building technology projects (heating, ventilation, air conditioning, cooling, sanitation, electrical), creation of energy certificates and building energy certificates, construction supervision and analysis (building physics, fire protection, indoor climate), and expert opinions for building damage and pollutants. The company offers its services primarily to private and public building owners, tenants, teachers, students, authorities, and property managers.

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Products & services

Industry:Technical Consulting & Engineering
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HARTMANN GESUNDE-UMWELT GmbH

✓ Offered6
Energy consulting
Energy consulting in accordance with the funding programme of the Canton of St. Gallen and with the Conference of Cantonal Energy Directors, including building modernisation with a concept, thermal insulation of individual building components, as well as GEAK® and GEAK®Plus.
Design of building services projects
Design of building services projects for heating, ventilation, air conditioning, refrigeration, sanitary services and electrical systems, as well as energy performance assessments for conversions and new builds.
Construction supervision
Construction supervision for MINERGIE® projects, including MINERGIE® MQS-Bau.
Analyses
Analyses in the fields of building physics, fire protection and indoor air quality.
Expert reports
Expert reports on building defects and pollutants.
Impulse consulting
Impulse consulting in accordance with the EnergieSchweiz programme for the energy-related modernisation of buildings.
Trust & reputation

ranQ Trust Score of HARTMANN GESUNDE-UMWELT GmbH

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

HARTMANN GESUNDE-UMWELT GmbH 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.
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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%
HARTMANN GESUNDE-UMWELT GmbH scores 75.7 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.83.012%
  • 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%
HARTMANN GESUNDE-UMWELT GmbH scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
HARTMANN GESUNDE-UMWELT GmbH 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

Kronenstrasse 11
9230 Flawil
Opening hours
Mon
08:30 - 17:00
Tue
08:30 - 17:00
Wed
08:30 - 17:00
Thu
08:30 - 17:00
Fri
08:30 - 17:00
Sat
08:30 - 12:00
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-153.956.392
Founded
2017 · 9 years
Last commercial register change
February 22, 2017
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.
88.0
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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