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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesSpecialized Construction InstallationsEyholzg. Ofenbau Heldner
g. Ofenbau Heldner Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Ofenbau Gilbert Heldner is the manufacture and distribution of wood-fired heating systems, wood stoves and whole-house heating systems with wood, including various types of stoves such as Giltstein stoves, Greithwald hearths, chimney stoves, storage stoves and soapstone stoves.

AI-generated
Offering

Products & services

Industry:Specialized Construction Installations
✓ Offered6
Stove construction and installation of wood-fired heating systems
Planning, energy calculations and installation of wood-fired heating systems, wood stoves and whole-house heating systems; plus design, new installations, restorations and expert assessments.
Nunnauuni soapstone stoves
Soapstone stoves, heat-storage stoves, heat-storage stoves with baking compartment and ranges; including planning and design for Nunnauuni stoves as well as professional installation.
Lotus half-storage stoves
Lotus half-storage stoves with advanced insulation, Clean Burn Technology and up to ten hours of heat storage; including consulting and professional installation.
Sikken stoves
Sikken stoves with steel plates, a large glass front and room-air-independent fresh-air supply; designed for a clear view of the fire and low pollutant levels.
Giltstone stoves
Renovation and preservation of old giltstone stoves, partly of historical value; ensuring and maintaining these traditional hearths.
Greithwald ranges
Greithwald ranges and wood cookers for classic and modern living; combines cooking with heat generation, including consulting and installation.
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4.0/5

g. Ofenbau Heldner

Trust & reputation

ranQ Trust Score of g. Ofenbau Heldner: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

g. Ofenbau Heldner scores 65.9 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.75.024%
  • 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.40.910%
  • 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%
g. Ofenbau Heldner scores 78.5 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%
g. Ofenbau Heldner 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%
g. Ofenbau Heldner scores 8.6 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 35.8.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

g. Ofenbau Heldner reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 4 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
5
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

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

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Secure profile

Location

Alte Kantonstrasse 2
3930 Eyholz

At a glance

Legal form
Sole proprietorship
UID
CHE-109.044.636
Founded
2001 · 25 years
Last commercial register change
February 6, 2014
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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