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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesSpecialized Construction InstallationsGrenchenHenzi & Sohn Warmluftheizung-Lüftung GmbH
Henzi & Sohn Warmluftheizung-Lüftung GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Henzi & Sohn Warmluftheizungen-Lüftungen GmbH is the development, manufacture and distribution of warm air heating systems and ventilation systems for various applications, including residential homes, chalets and other buildings. The company offers a wide range of products, including warm air generators, oil and gas heating units, monobloc devices, comfort warm air generators, accessories and special devices. In addition, the company provides repair and renovation services for all brands.

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Products & services

Industry:Specialized Construction Installations
✓ Offered
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Henzi & Sohn Warmluftheizung-Lüftung GmbH

7
Hot air generators
Hot air generators for various applications, in vertical or horizontal design, with a discharge hood or air duct system; also repairs of existing systems of all brands.
Oil and gas heating inserts
Oil and gas heating inserts for hot-air tiled stoves, for replacement and retrofit, with variants for oil and gas operation as well as controllable versions.
Special equipment for houses & chalets
Special equipment for use in houses and chalets, with stainless-steel heat register, condensate drain, sound-insulated fan compartment, and duct connection.
Gas wall units
Space-saving gas wall units for hall heating and similar applications; the page refers to consultation and non-binding offers.
Monobloc units
Monobloc units configured specifically to requirements; the page offers consultation and non-binding offers.
HB comfort hot air generators
HB comfort hot air generators as an available product; further information and requests are handled via the contact address.
Accessories
Accessories for heating and ventilation engineering, including room thermostats for controlling heating, cooling, air conditioning, and ventilation.
Trust & reputation

ranQ Trust Score of Henzi & Sohn Warmluftheizung-Lüftung GmbH: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

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Data basis 54% · As of October 2026

Henzi & Sohn Warmluftheizung-Lüftung 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%
Henzi & Sohn Warmluftheizung-Lüftung GmbH scores 67.8 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.64.612%
  • 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%
Henzi & Sohn Warmluftheizung-Lüftung 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%
Henzi & Sohn Warmluftheizung-Lüftung GmbH scores 0.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.0.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Henzi & Sohn Warmluftheizung-Lüftung GmbH reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

Knowledge

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Location

Dahlienweg 9
2540 Grenchen

At a glance

Legal form
Limited Liability Company
UID
CHE-467.090.464
Founded
2021 · 5 years
Last commercial register change
June 25, 2026
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.88.06%
  • 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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