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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesLangnau Im EmmentalHeiztechnik Widmer AG
Heiztechnik Widmer AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Heiztechnik Widmer AG is the planning, installation, maintenance and repair of heating systems, including various types of heating such as wood chip firing, log firing, pellet heating, solar systems, heat pumps, oil heating and radiators/underfloor heating. The company also provides consulting and service services to customers to optimize their heating systems to their needs.

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Products & services

Industry:Plumbing & Building Services
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Heiztechnik Widmer AG

11
Planning heating systems
Cost estimates, energy consulting and energy documents, support with building submissions, and planning and tender document preparation for all heating systems.
Heating system refurbishments and construction site supervision
Coordination and construction site supervision for heating system refurbishments, from planning to the implementation of heating systems.
Service for heating systems
Support with problems with existing heating systems, including quick contact by phone or email.
Mobile heating units
Mobile heating solutions for rent for single-family houses, residential developments and manufacturing facilities, with outputs from 67 to 200 kW.
Wood-chip firing
Wood-chip heating systems for small multi-family houses up to large district heating networks, fully automatic, robust, comfortable and efficient.
Piecewood firing
Modern piecewood heating systems with energy storage, coordinated boiler selection, automatic combustion control, easy loading and long burn times.
Pellet heating system
Pellet heating systems for smaller output ranges with efficient operation, an ecological heating system and flexible solutions for pellet storage.
Solar systems
Solar systems for heating and domestic hot water production using solar energy, as a sustainable solution for energy self-sufficiency.
Heat pumps
Heat pumps for generating energy from outside air, preferably for low-temperature heating systems with underfloor heating or low-temperature radiators.
Oil heating
Oil heating systems with condensing technology for energy-efficient operation, high operational reliability and low space requirements for storage and the heat generator.
Radiators and underfloor heating
Radiators and underfloor heating for comfortable warmth, even heat distribution and the combination with different heating systems.
Trust & reputation

ranQ Trust Score of Heiztechnik Widmer AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Heiztechnik Widmer AG scores 61.8 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.70.224%
  • 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.63.210%
  • 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.35.08%
Heiztechnik Widmer AG 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%
Heiztechnik Widmer AG 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%
Heiztechnik Widmer AG scores 37.1 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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Heiztechnik Widmer AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.5 out of 5 stars from 11 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
4.5
of 5

Aggregated from 11 reviews across all connected sources

Sources
GGoogle4.511
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Bäraugrundstrasse 37A
3550 Langnau Im Emmental

At a glance

Legal form
Corporation
UID
CHE-108.509.437
Founded
1996 · 30 years
Last commercial register change
October 13, 2025
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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