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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesSurseeZEWAG Heizungs- und Sanitärinstallationen AG
ZEWAG Heizungs- und Sanitärinstallationen AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Zewag AG is the planning, installation and maintenance of heating and sanitary technology, including heating technology, sanitary technology and ventilation technology, for private and commercial customers in the Sursee region.

AI-generated
Offering

Products & services

Industry:Plumbing & Building Services
✓ Offered3
Heating system renovation
Heating system renovation from a single source with advice, planning and execution; heat pumps, photovoltaics, wood-fired heating systems as well as oil and gas boilers.
Sanitary and bathroom renovation
Bathroom renovation and sanitary installations with advice, planning and execution; water, wastewater, gas and compressed-air lines, fittings, appliances and water softening.
Service and maintenance
Service work for plumbing and heating, including repairs, maintenance, descaling of boilers, descaling of WCs, leak testing and re-adjustment of systems.
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4.1/5

ZEWAG Heizungs- und Sanitärinstallationen AG

Trust & reputation

ranQ Trust Score of ZEWAG Heizungs- und Sanitärinstallationen AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

ZEWAG Heizungs- und Sanitärinstallationen 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.
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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%
ZEWAG Heizungs- und Sanitärinstallationen AG scores 89.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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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%
ZEWAG Heizungs- und Sanitärinstallationen AG scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
ZEWAG Heizungs- und Sanitärinstallationen AG scores 9.1 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.9.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ZEWAG Heizungs- und Sanitärinstallationen 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

Schlottermilch 8a
6210 Sursee

At a glance

Legal form
Corporation
UID
CHE-107.277.112
Founded
1974 · 52 years
Last commercial register change
September 1, 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

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