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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringRenggDIEMO Warmluftheizungen AG
DIEMO Warmluftheizungen AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

DIEMO Warmluftheizungen AG plans, supplies, installs and refurbishes warm-air heating systems. The company offers oil-, gas- and wood-fired units, mobile and wall-/ceiling-mounted warm-air generators, air heaters, ceiling fans and chimneys, and provides equipment for hay drying.

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Offering

Products & services

Industry:Technical Consulting & EngineeringSpecialized Construction Installations
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3.8/5

DIEMO Warmluftheizungen AG

✓ Offered6
Design, supply, installation and renovation of warm-air heating systems
Planning, quotation, supply, installation and renovation of warm-air heating systems for private customers, businesses and installers throughout Switzerland and Liechtenstein.
Warm-air generators for commercial and industrial use
Stationary, wall-mounted and mobile warm-air generators for oil and gas operation, complemented by air heaters, ceiling fans and suitable chimneys.
Wood-fired warm-air heaters
Wood-fired warm-air heaters for commercial and industrial use, with cordwood or pellet operation; including the DIEMO and DIEMO Calor variants.
Warm-air generators for residential buildings
Warm-air generators with 20 to 35 kW for use in residential buildings.
Hay dryers
Hay dryers for oil and wood firing, with variants for cordwood or pellet operation, for use in residential homes, business and office premises.
Chimneys
Planning and installation of suitable chimneys according to wishes or requirements.
Trust & reputation

ranQ Trust Score of DIEMO Warmluftheizungen AG: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

DIEMO Warmluftheizungen AG scores 49.8 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.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.35.08%
DIEMO Warmluftheizungen 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%
DIEMO Warmluftheizungen AG scores 83.3 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).83.322%
DIEMO Warmluftheizungen AG scores 4.6 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 35.4.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

DIEMO Warmluftheizungen AG 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 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 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

Stöcken
6162 Rengg

At a glance

Legal form
Corporation
UID
CHE-107.923.202
Founded
1979 · 47 years
Last commercial register change
June 21, 2017
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.
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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