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St. Margrethen · SG
Heller AG
InstallationServicing
Commercial · Residential
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Company overview
What it offers
Plans and implements refrigeration, air-conditioning and energy systems for private, commercial and industrial uses.
How it presents itself
Presents itself as an established technical specialist prioritising quality and environmental awareness.
Summarised from the company’s website; quality claims reflect how the business describes itself.
Sources and check date
What reviewers mention
Not enough verified review text is available yet for a summary.
Sources & evidenceSource checked · 28 Sept 2026
heller-ket.ch Source checked · 28 Sept 2026
Research note
The official site lists St. Gallen, Thurgau, both Appenzell cantons, Schaffhausen and Zurich as its service area. It describes climate systems for private, office, commercial and industrial uses; dedicated product and maintenance pages provide service evidence.
heller-ket.ch Source checked · 28 Sept 2026
Research note
Official service page supporting the installation or maintenance capability; coverage and customer types are documented on the company homepage.
heller-ket.ch Source checked · 28 Sept 2026
Research note
Official service page supporting the installation or maintenance capability; coverage and customer types are documented on the company homepage.
No comparable project total is recorded. Confirm scope and CHF pricing directly with the firm. No editorial rating published