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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesZofingenLehmann 2000 AG
Lehmann 2000 AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Climartis AG is the acquisition and expansion of companies in the field of renewable energies and energy efficiency, particularly in the sectors of district heating, geothermal energy, heat pumps, solar heat and climate/ventilation. The company focuses on the takeover and integration of companies to build a medium-sized SME with around 500 employees and a turnover of approximately CHF 100 million.

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Products & services

Industry:Plumbing & Building Services
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Lehmann 2000 AG

✓ Offered5
Thermal networks
Thermal networks for heat and cooling supply, including house connections, transfer stations, and the refurbishment of existing heating plants into district heating systems.
Heating systems
Heating systems with renewable energy sources, in particular heat pumps and wood heating, for new builds, conversions, and heating refurbishments.
360° consulting
360° consulting for heat and air-conditioning systems, including analysis of the existing heating system, support during the permitting process, and assistance up to the disbursement of funding.
Solar systems
Solar systems for households and businesses, including photovoltaic systems, solar thermal installations for domestic hot water and heating support, as well as mounting structures for flat and pitched roofs.
Energy storage systems and charging station
Energy storage systems for photovoltaic installations and charging infrastructure for electric vehicles, including DC, AC, and hybrid storage, as well as smart charging stations.
Trust & reputation

ranQ Trust Score of Lehmann 2000 AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 100% · As of October 2026

Lehmann 2000 AG scores 69.2 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.49.324%
  • 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.92.510%
  • 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.100.08%
Lehmann 2000 AG scores 92.3 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.82.07%
Lehmann 2000 AG scores 86.7 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).86.722%
Lehmann 2000 AG scores 17.2 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 35.34.34%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Lehmann 2000 AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 3.9 out of 5 stars from 37 customer reviews. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
3.9
of 5

Aggregated from 37 reviews across all connected sources

Sources
GGoogle3.937
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

July 14, 2023Media
Die Inhaber der LEHMANN 2000 AG stellen die Weichen für die Zukunft
aarauer-nachrichten.ch

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Location

Müllerweg 5
4800 Zofingen
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00, 13:30 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-108.359.764
Founded
1995 · 31 years
Last commercial register change
November 18, 2025
Employees
21 to 50
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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