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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryCrafts & TradesPlumberLausanneAérotec21 Sàrl
Aérotec21 Sàrl Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Aérotec21 Sàrl provides services for heating, air-conditioning and ventilation systems. Its work includes installing heat pumps, heating and cooling equipment, and ventilation systems, as well as repairs and maintenance; it also offers pool servicing.

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Presence

Service area

Offering

Products & services

Industry:Plumber
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4.2/5

Aérotec21 Sàrl

✓ Offered9
Heating installation
Installation of heat pumps and heating, mounting of the unit, commissioning and the necessary adjustments.
Heating breakdown repair
Repairs for heating of all makes, diagnosis of faults and repairs to get the unit back in working order.
Heating maintenance
Maintenance and cleaning of heating systems, regular checks to ensure proper operation and extend the service life of the installation.
Air-conditioning installation
Installation of air conditioners, system installation, start-up, checks and adjustments, with advice on choosing the model.
Air-conditioning repair & maintenance
Air-conditioner breakdown repair and maintenance including cleaning of filters, topping up the refrigerant and checking that the unit is in proper condition.
Ventilation installation
Installation of ventilation systems and VMC, complete installation and adjustments to ensure good indoor air quality.
Ventilation breakdown repair
Repair of ventilation systems and VMC, diagnosis of malfunctions and rapid intervention in the event of a breakdown.
Ventilation maintenance
Ventilation and VMC maintenance, cleaning of filters, inspection of ducts, checking of motors and components.
Pool repair & maintenance
Repair of a pool heat pump and pipework, maintenance and pool cleaning with professional equipment.
Trust & reputation

ranQ Trust Score of Aérotec21 Sàrl: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of November 2026

Aérotec21 Sàrl scores 87.1 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.89.424%
  • 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.80.810%
  • 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.88.08%
Aérotec21 Sàrl scores 69.4 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.64.612%
  • 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%
Aérotec21 Sàrl scores 86.7 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).86.722%
Aérotec21 Sàrl scores 0.9 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 35.0.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Aérotec21 Sàrl reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 23 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 23 reviews across all connected sources

Sources
GGoogle523
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Avenue de Sévelin 28
1004 Lausanne
Opening hours
Mon
07:00 - 18:00
Tue
07:00 - 18:00
Wed
07:00 - 18:00
Thu
07:00 - 18:00
Fri
07:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-468.312.704
Founded
2021 · 5 years
Last commercial register change
October 20, 2026
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • VDLausanne
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.85.03%
    • Full methodology

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