ranQ
ranQ
ranQ
DirectoryIndustriesPlacesKnowledgeComparisonsSoon
Sign inCheck visibility
ranQHSG Startup LabelRecognised by the
HSG Startup Label

The leading AI company directory, built to boost AI visibility.

DEENFRIT
Product
  • Pricing
  • Directory
  • Industries
  • Trust Score
Company
  • About
  • Partner program
  • Contact
  • Legal
© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesVolketswilLehmann + Co AG Gebäudetechnik
Lehmann + Co AG Gebäudetechnik Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Lehmann & Co. AG encompasses the planning, installation, maintenance and repair of heating, ventilation and air conditioning systems, as well as the execution of renovations in these areas.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered5
Heating - Cooling
Advisory and planning, as well as installation of heat pump, solar energy, pellet and wood chip systems, Minergie systems and conventional heating plants; conversions, renovations and boiler replacements.
Ventilation - Air Conditioning
Advisory and planning, as well as installation of controlled residential ventilation, conventional ventilation systems and air-conditioning systems; conversions and renovations of existing systems.
Renovations
Renovation work on heating, cooling, ventilation and air-conditioning systems; conversion of conventional systems into environmentally friendly alternative systems as well as support as a link to the companies involved.
Service Contracts and Maintenance
Recurring maintenance and servicing with a flexible service program, basic service contracts, transparent scope of services and documented repairs.
Emergency Service
Emergency service 24 hours a day, 365 days a year for faults and urgent call-outs on systems.
LeadhubOutbound Leads by COHAGA

Looking for direct email addresses and phone numbers?

Leadhub delivers verified contact details and decision-makers from over 750,000 Swiss companies — management, procurement, marketing, HR.

Discover Leadhub
4.1/5

Lehmann + Co AG Gebäudetechnik

Trust & reputation

ranQ Trust Score of Lehmann + Co AG Gebäudetechnik: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Lehmann + Co AG Gebäudetechnik scores 61.7 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.65.024%
  • 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.78.08%
Lehmann + Co AG Gebäudetechnik scores 89.3 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.70.07%
Lehmann + Co AG Gebäudetechnik 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%
Lehmann + Co AG Gebäudetechnik scores 13.7 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 35.13.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Lehmann + Co AG Gebäudetechnik reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.3 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
4.3
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle4.34
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

No knowledge articles yet

Once Lehmann + Co AG Gebäudetechnik has claimed this profile, we'll publish editorial articles and case studies here together.

Get started
Comparisons

Lehmann + Co AG Gebäudetechnik in comparison

Soon

Industry comparisons are coming soon

We're preparing industry comparisons that rank Lehmann + Co AG Gebäudetechnik by reviews, experience and specialisations.

Is this your company?

Claim the company profile of Lehmann + Co AG Gebäudetechnik to make its contact details visible. With a plan we additionally create and publish industry comparisons, articles and much more.

Secure profile

Location

Brunnenstrasse 7
8604 Volketswil
Opening hours
Mon
07:30 - 12:00, 13:00 - 16:30
Tue
07:30 - 12:00, 13:00 - 16:30
Wed
07:30 - 12:00, 13:00 - 16:30
Thu
07:30 - 12:00, 13:00 - 16:30
Fri
07:30 - 12:00, 13:00 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-109.099.784
Founded
1994 · 32 years
Last commercial register change
March 15, 2023
Employees
11 to 20
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.100.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

    Similar companies

    SI
    SHL Installationen GmbH
    Volketswil
    EH
    ECO HAUSTECHNIK AG
    Zurich
    TH
    Top Haustechnik AG
    Stäfa
    DA
    Dober AG
    Schlieren
    PA
    Pfiffner AG
    Zurich
    DH
    Düring HLKS Engineering GmbH
    Stäfa
    LE
    Lippuner Energie- und Metallbautechnik AG, Zweigniederlassung Wallisellen
    Wallisellen
    VG
    Varitech Gebäudetechnik AG
    Schlieren