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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,837 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesLangenthalLang Heizungen AG
Lang Heizungen AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Lang Heizungen AG provides consulting, design, installation and maintenance services for heating and cooling systems. It plans, installs and services heat pumps, solar thermal systems, wood-fired, oil and gas heating systems, TABS (thermally activated building systems) and building cooling solutions.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered11
Advice
Advice on heating and cooling systems, energy carriers and cost-effective solutions; including needs and budget clarification as well as a cost-effectiveness assessment.
Planning
Planning of heating projects with an in-house planning department, CAD planning software, coordination of materials and equipment, and scheduling in coordination with the site management.
Installation
Professional installation and commissioning of heating systems; also coordinating various construction teams for heating renovations and on-time completion.
Service
Repairs and maintenance of heating systems, including regular servicing, clean work handling and rapid response in emergencies.
Heat pumps
Heat pumps for heating solutions, resource- and energy-saving; described as an ecological and often the most economical heating solution for new builds and renovations.
Wood-fired heating systems
Wood-fired heating systems for heating installations with modern, easy-to-operate systems, using wood as fuel and protecting the environment.
Solar systems
Solar systems for domestic hot water production and heating support; used to harness the energy potential of solar power.
Gas heating systems
Gas heating systems for replacement and renovation in suitable buildings; also mentioned in combination with a thermal solar system and biogas.
Oil heating systems
Oil heating systems for replacement and renovation in suitable buildings; also in combination with a thermal solar system for older or less energy-efficient buildings.
TABS (Thermoaktives Bauteilsystem)
TABS with heating pipes embedded in concrete floors and ceilings; creates a pleasant room climate and also enables cooling in summer.
Cooling
Cooling of properties in conjunction with the heating solution, including Free-Cooling and Active Cooling as well as cooling via underfloor heating.
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4.1/5

Lang Heizungen AG

Trust & reputation

ranQ Trust Score of Lang Heizungen AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Lang Heizungen AG 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%
Lang Heizungen AG scores 74.6 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.86.512%
  • 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%
Lang Heizungen 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%
Lang Heizungen AG scores 68.6 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 35.68.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Lang Heizungen AG reaches a ranQ Trust Score of 4.1 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.

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Location

Försterstrasse 4a
4900 Langenthal

At a glance

Legal form
Branch
UID
CHE-148.628.640
Founded
2016 · 10 years
Last commercial register change
August 10, 2016
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.
76.0
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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