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

About the company

Relesa AG installs and renovates heating, air-conditioning and solar systems, including oil and gas heating, heat pumps, solar thermal systems and photovoltaic systems. It also carries out upgrades, overhauls and service work on building technology installations.

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Presence

Service area

Offering

Products & services

Industry:Air conditioningHeating installer
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3.9/5

Relesa AG

Photovoltaics
✓ Offered6
Heating system installations and replacement
Oil-fired heating systems, gas heating systems and heat pumps; installation of complete new systems, refurbishment of existing systems, as well as addition and revision of the technology.
Air-conditioning systems
Mobile and permanently installed split air-conditioning units for living, working and training rooms as well as wine cellars; consultation, planning and installation.
Compact air-conditioning systems – complete packages
Fixed-price air-conditioning packages for compact systems, with information and a contact option on the offer page.
Solar systems
Solar thermal for domestic hot water and heating support, as well as photovoltaics in collaboration with selected partners.
Service for heating, air-conditioning and solar
Maintenance, inspection and checks of systems, replacement of spare parts, troubleshooting of heating failures, descaling of boilers and official combustion inspection.
Impulse advisory for renewable heating
Advisory in the canton of Baselland with a funding report for oil, gas or electric heating systems; assessment of suitable renewable heating systems and a heating cost calculator.
Trust & reputation

ranQ Trust Score of Relesa AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of November 2026

Relesa AG scores 53.8 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.70.824%
  • 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.27.910%
  • 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.35.08%
Relesa AG scores 85.5 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.55.07%
Relesa 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%
Relesa AG scores 2.3 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 35.2.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Relesa AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 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 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Lettenweg 118
4123 Allschwil
Opening hours
Mon
07:30 - 12:00, 13:00 - 17:00
Tue
07:30 - 12:00, 13:00 - 17:00
Wed
07:30 - 12:00, 13:00 - 17:00
Thu
07:30 - 12:00, 13:00 - 17:00
Fri
07:30 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-108.073.210
Founded
1983 · 43 years
Last commercial register change
February 15, 2022
Employees
1 to 10

Active in 3 of 26 cantons · 1 municipality

  • Northwestern Switzerland
  • BSBasel
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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