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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsLachen SzMZ Sanitär + Heizung AG
MZ Sanitär + Heizung AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of MZ Sanitär + Heizung AG consists of planning, organizing and executing sanitary and heating work, including bathroom renovations, heating system upgrades and the installation of solar systems. The company also offers comprehensive services in the areas of renovation, consulting and maintenance.

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Products & services

Industry:Solar & Photovoltaics
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4.4/5

MZ Sanitär + Heizung AG

5
Heating / thermal solutions / cooling
Planning, installation, commissioning and maintenance of heating systems; heat pumps, solar technology, pellet, gas, oil, wood and district heating systems as well as free cooling.
Plumbing installations
Planning and installation of sanitary facilities for new builds, conversions, occupied renovations and extensions; including rainwater utilisation, gas installations, heat pump boilers and water treatment.
Bathroom refurbishment and bath renovation
Design, planning and implementation of bathroom projects; renovate and refurbish bathrooms, 3D bathroom planning, coordination of the work and implementation from a single source.
Renewable heating advisory
On-site consultation for replacing a heating system with building survey, assessing options, selecting a renewable heating system and completing the heating cost calculator, as well as accompanying the process.
Service and maintenance
Service and repair work for drinking water and wastewater installations; maintenance work, technical clarifications, solution proposals, service check and appointment coordination.
Trust & reputation

ranQ Trust Score of MZ Sanitär + Heizung AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

MZ Sanitär + Heizung AG scores 79.6 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.81.624%
  • 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.58.610%
  • 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%
MZ Sanitär + Heizung AG 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%
MZ Sanitär + Heizung AG scores 83.3 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).83.322%
MZ Sanitär + Heizung AG scores 37.1 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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

MZ Sanitär + Heizung AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 9 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
5
of 5

Aggregated from 9 reviews across all connected sources

Sources
GGoogle59
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

St. Gallerstrasse 86
8853 Lachen Sz
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:00
Tue
07:00 - 12:00, 13:00 - 17:00
Wed
07:00 - 12:00, 13:00 - 17:00
Thu
07:00 - 12:00, 13:00 - 17:00
Fri
07:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.875.572
Founded
1989 · 37 years
Last commercial register change
August 27, 2026
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.
100.0
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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