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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,544 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringEinsiedelnFässler Leonardi GmbH
Fässler Leonardi GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company Fässler Leonardi GmbH specializes in the planning, calculation, and conception of building technology and energy solutions. The core activities include in particular: planning and realization of HVAC and industrial piping systems (heating, ventilation, air conditioning, cooling, and sanitary facilities); creation of energy and mini-energy certificates; development of energy concepts and GEAK (total energy certificate) and impulse consulting; application of Building Information Modeling (BIM); and conducting drone surveys and heating cost accounting. The company thus offers comprehensive services in the field of building technology and energy efficiency.

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Products & services

Industry:Technical Consulting & Engineering
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4.0/5

Fässler Leonardi GmbH

✓ Offered8
Planning HVAC&R & Utility Lines
Planning of heating, ventilation, air-conditioning, refrigeration and sanitary systems as well as service lines; servicing via sewer, water, ground heat exchanger probes and district heating lines, including coordination of trades.
Energy Concepts
Analysis and planning of integrated building energy concepts; variant comparisons for HVAC&R systems, building automation, measurement concepts, cost-efficiency calculations and CO2 assessments.
Energy and Minergie Certificates
Preparation of energy certificates for new, extended and converted buildings; evidence of energy measures in accordance with legislation and advice on Minergie standards.
GEAK & Impulse Consulting
Creation of GEAK and GEAK Plus to analyse the building's condition as well as impulse consulting «erneuerbar heizen» with an on-site inspection and heating alternatives.
BIM (Building Information Modeling)
Support for BIM projects with complex 3D models and a central platform for collaboration between architects, specialist planners and clients.
Funding Applications & Building Programme
Analysis of possible measures for the building envelope and heating as well as preparation, submission and completion of funding applications for the Building Programme.
Heating Cost Allocation
Consumption-based heating and domestic hot-water cost allocation (VHKA/VWKA), including measurement of actual consumption and fair distribution of energy costs.
Drone Aerial Photography
High-resolution aerial photography for documentation or inspection of existing roof surfaces and building objects.
Trust & reputation

ranQ Trust Score of Fässler Leonardi GmbH: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Fässler Leonardi GmbH scores 59.3 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.75.024%
  • 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.40.910%
  • 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%
Fässler Leonardi GmbH scores 86.7 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%
Fässler Leonardi 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%
Fässler Leonardi GmbH scores 28.6 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: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Fässler Leonardi GmbH reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 4 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 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Langrütistrasse 45
8840 Einsiedeln
Opening hours
Mon
07:30 - 17:00
Tue
07:30 - 17:00
Wed
07:30 - 17:00
Thu
07:30 - 17:00
Fri
07:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-108.457.970
Founded
1995 · 31 years
Last commercial register change
January 17, 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.
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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