Energiezentrale ARA Chur / Wärmepumpe NH3

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Location: Canton GR
Procuring office: Beag Engineering AG
Requesting office: IBC Energie Wasser Chur

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Awarded

According to the simap publication. Values that are not given are deliberately missing here.

Awarded to

As published on simap.ch: winner and price (with or without VAT, as stated).

Award of 25.03.20251 bid
- CTA AG, Zweigniederlassung Zürich, ZürichCHF 2’422’500.00 without VAT

Awards of this contracting authority

Justification

Das Angebot der CTA AG stellt sich als das wirtschaftlich günstigste dar und erfüllt die Ausschrei-bungsbedingungen vollständig. Es ist zudem das einzige Angebot, das eingegangen ist

AI summary

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In brief
Services
Requirements
Conditions
Dates
Award criteria

An example of the structure without content: no summary is stored for this tender yet.

What is being procured?

Scope of work

Diese Ausschreibung umfasst die Realisierung der beiden Ammoniak-Wärmepumpen für die Energiezentrale ARA in Chur. Die eine Wärmepumpe wird in der ersten Etappe 2025/2026 realisiert, die Zweite ca. fünf Jahre danach.

Die neue Wärmeerzeugung der Energiezentrale ARA erfolgt im Endausbau mittels zwei neuen zweistufigen NH3 Wärmepumpen. Die Wärmeleistung der beiden Wärmepumpen beträgt je ca. 1'850 kW.

Als Energiequelle für die Wärmepumpen dient die Abwärme der ARA. Die Wasserentnahme aus der ARA wurde schon im Jahr 2019 gebaut und ist vorbereitet für die gewünschte Kälteleistung. Der Rohrleitungsbau / Anschluss der Wärmepumpe ist jedoch nicht Bestandteil dieser Submission.

Key facts, codes and options

Type of contract: Construction and installation
Type of construction: Building construction
Construction service: Execution
Procedure: Open procedure
Trades: OAG 4.2.1 – Energy production
CPV: CPV 42511110 – Heat pumps
Options: Not evident from the available publication data.
Variants: Not evident from the available publication data.
Partial offers: Not evident from the available publication data.

TEXFY assessment: Products, installations, quantities, technical specifications and exclusions are not structured fields of the publication. TEXFY does not analyse the free text on them: check the original text and the tender documents.

Market data for this service

From awards published on simap.ch, without rankings and without rating companies.

Comparable awards

Wastewater treatment plants, canton of Graubünden, last 12 months

3 awards, bids (median): 2.

Awards: Wastewater treatment plants

Range of award prices

Wastewater treatment plants, all of Switzerland, last 12 months

CHF 207’05110 % of the prices were lower

CHF 681’396Median: half were lower

CHF 5’676’86310 % of the prices were higher

8 out of 10 award prices were between CHF 207’051 and CHF 5’676’863.

From 178 published award prices in CHF from 13.11.2025 to 02.11.2026, with or without VAT, as published. A single contract can differ widely.

Official source

Go to the official tender

simap project number: 5848
Publication number: 5848-02
Covered by international agreements: No

Checked against simap: 10.11.2026, 18:02

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More in the guide

Award, reasons and appeal

Contract awards in Graubünden: monthly reports

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