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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumbing & Building ServicesOtelfingenGrünenwald AG
Grünenwald AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Grünenwald AG encompasses the planning, execution, and maintenance of various plants and systems in the field of renewable energy and building technology, particularly: heat pump systems, drilling operations (deep drilling, earth probe drilling), air purification systems, controlled residential ventilation, solar systems (solar collectors, photovoltaic systems), and climate and refrigeration technology. The company offers comprehensive solutions under the motto "everything under one roof", meaning it assumes responsibility for the entire system from planning to maintenance.

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Offering

Products & services

Industry:Plumbing & Building Services
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3.9/5

Grünenwald AG

✓ Offered7
Heat pumps
Heat pump systems for brine-water, water-water and air-water; domestic hot water preparation with domestic hot water heat pumps as well as consultation, planning, installation and service.
Boreholes
Deep boreholes for geothermal probes up to 250 metres, including drilling work even under challenging topographical conditions and an environmentally sound air-lift method.
Solar energy
Solar thermal collectors for domestic hot water heating and heating support, as well as photovoltaic systems for electricity generation and feed-in to the grid.
Air conditioning and refrigeration technology
Ventilation, air-conditioning and refrigeration systems, including variable and constant volume flow systems, chilled ceilings, split units, ice storage systems and heat recovery.
Air purification
Air purification with ceiling and stand units as well as smoking cabins for offices, commercial premises, private households, schools, kindergartens, care homes, medical practices and hospitals.
Controlled residential ventilation
Controlled residential ventilation with draft-free, low-noise air exchange and recovery of the energy stored in the exhaust air.
Home automation
Home automation systems for heating, air conditioning, ventilation, security, shading, Multiroommedia, lighting, energy management and remote access.
Trust & reputation

ranQ Trust Score of Grünenwald AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 100% · As of October 2026

Grünenwald AG scores 52.3 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.16.624%
  • 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.100.010%
  • 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%
Grünenwald 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%
Grünenwald 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%
Grünenwald 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

Grünenwald AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 3.2 out of 5 stars from 73 customer reviews. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
3.2
of 5

Aggregated from 73 reviews across all connected sources

Sources
GGoogle3.273
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

August 17, 2021Media
Grünenwald AG: Wärmepumpen – Wärme aus der Umwelt für alle Gebäudearten
baublatt.ch

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Comparisons

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Location

Lauetstrasse 39
8112 Otelfingen
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.128.509
Founded
1989 · 37 years
Last commercial register change
June 23, 2022
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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