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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryCrafts & TradesAir conditioningNäfelsThoma Systems GmbH
Thoma Systems GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Thoma Systems GmbH manufactures and sells air filters for residential and commercial use, including supply- and exhaust-air filters and custom-made items for ventilation systems. It also offers consulting, ventilation-unit cleaning and airflow measurements.

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Products & services

Industry:Air conditioningGeneral goods production
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3.8/5

Thoma Systems GmbH

✓ Offered6
Air filters
Air filters and filter sets for ventilation units, especially for Zehnder KWL; exhaust air filters, supply air filters, replacement compact filters, and suitable filter solutions for various equipment models.
Filter subscription
Filter subscription with automatic delivery of the right air filter for the filter change; on-time shipping, no ordering effort and no storage burden for the customer.
Filter box
Filter box with 10 individually packaged air filters, including hygiene bags and return shipping of used filters for disposal; as a storage box for multiple filter changes.
Consulting
Consulting for controlled residential ventilation and filter selection; independent support for projects, without brand commitment, with experience in the ventilation field.
Device cleaning
Cleaning of ventilation units and ventilation systems, complemented by checking room ventilation and supporting the preservation of value of the indoor air technology system.
Airflow measurement
Airflow measurement for ventilation systems, to set the volume flows and air outlets correctly according to the duct network calculation.
Trust & reputation

ranQ Trust Score of Thoma Systems GmbH: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of November 2026

Thoma Systems GmbH scores 56.5 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.68.224%
  • 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.17.610%
  • 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.70.08%
Thoma Systems GmbH scores 74.1 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.79.212%
  • 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.55.07%
Thoma Systems GmbH 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%
Thoma Systems GmbH scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Thoma Systems GmbH reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 1 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

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

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Industriestrasse 20
8752 Näfels
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
Limited Liability Company
UID
CHE-340.310.744
Founded
2018 · 8 years
Last commercial register change
January 3, 2020
Employees
1 to 10
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.
88.0
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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