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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumberWinterthurPAUL HERZOG AG
PAUL HERZOG AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

PAUL HERZOG AG plans and installs heating and plumbing systems for new builds and renovations. Its services include oil and gas heating, heat pumps, pellet and solar systems, water and wastewater installations, pipework, repairs and maintenance.

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Service area

Offering

Products & services

Industry:Plumber
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4.0/5

PAUL HERZOG AG

Heating systems
Heating systems for conversions and new builds, from single-family homes to large boiler installations; planning and implementation of complete heating systems from heat generation to heat distribution.
Sanitary installations
Sanitary installations for new builds, conversions and renovations; bathrooms, showers, WC facilities, cold- and hot-water installations, drainage and sewer lines, water treatment and rainwater usage.
Repair service
Repair service for emergencies, faults, maintenance and upkeep; rectification of defects on radiator valves and fittings, including on-call duty outside business hours.
Heat pumps
Heat pumps for heating and domestic hot water; water/water, warm-water, air/water and brine/water heat pumps, as well as control technology for individual units and complex systems.
Oil and gas heating
Oil and gas heating systems with modern heating boilers and burners; energy-saving and low-emission systems, as well as domestic hot-water heaters for different space and usage requirements.
Pellet heating systems
Pellet heating systems as part of the heating offering; planning and integration of pellet systems for heating and domestic hot water within complete heating solutions.
Solar heating
Solar heating and solar systems for heating domestic hot water and supporting the heating system; designed for small and large installations with coordinated sizing and efficiency.
Trust & reputation

ranQ Trust Score of PAUL HERZOG AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 100% · As of November 2026

PAUL HERZOG AG scores 60.5 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.73.510%
  • 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.78.08%
PAUL HERZOG AG scores 90.9 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%
PAUL HERZOG AG scores 88.3 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).88.322%
PAUL HERZOG AG scores 19.3 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 35.28.64%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.10.04%
Qualifications+0.00

PAUL HERZOG AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 3.8 out of 5 stars from 17 customer reviews. As of November 2026.

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

Reviews

Aggregated rating

Aggregated rating
3.8
of 5

Aggregated from 17 reviews across all connected sources

Sources
GGoogle3.817
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

March 5, 2024Media
Wirtschaft in Winterthur: Die Anwärter für den KMU-Max stellen sich vor
tagesanzeiger.ch

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Location

Papiermühleweg 19
8408 Winterthur

At a glance

Legal form
Corporation
UID
CHE-105.786.762
Founded
1974 · 52 years
Last commercial register change
August 14, 2025
Employees
11 to 20

Active in 1 of 26 cantons

  • ZHZurich
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.85.03%
    • Full methodology

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