Permanent project revision

Greencity 2000-Watt District Energy System

Revision 2026-08-22-evidence-baseline · effective 2026-07-29

Current revision. This is the snapshot used by the live entity page.

unreviewed

Created the first structured Evidence Passport with 8 claims and 5 source dossiers.

sha256:a6f01d595de4bd1f307f49ddbf538c41708a66cb82a3d78cc6837ef2b4dc4484

All revisions → Current entity page →

Change set

add /evidencePassport — Added claim-level evidence mapping and source dossiers.
add /revisionHistory — Established a permanent, hash-addressed baseline revision.

8: of 8 claims mapped
5: source dossiers
2: publication dates recorded
0: archives linked
0: exact locators
0: content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-9dbc1c59b636032c descriptive

Zurich's municipal utility ewz finances and runs the heat, cooling and power network for Greencity

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: ewz's own reference page: "Als Partner im Energiebereich haben wir eine ganzheitliche Lösung für die komplette Energieinfrastruktur geplant, finanziert und realisiert" ("as energy partner we planned, financed and built a complete solution for the entire energy infrastructure"), and "verantworten wir die komplette Energieinfrastruktur und stellen den Nutzenden das ganze Jahr über zuverlässig Strom sowie Wärme- und Kälteenergie zur Verfügung" (we are responsible for the complete energy infrastructure and reliably supply users year-round with electricity as well as heat and cooling). The city's 2014 press release confirms the same: "Das ewz wird für das Areal Greencity Energiedienstleistungen aus einer Hand erbringen. Es wird die Anlagen für die Kälte- und Wärmeversorgung planen, finanzieren, erstellen und betreiben."
Caveat: No claim-specific caveat recorded

Claim 2 clm-88ca8924cc222172 quantitative

Switzerland's first 2000-Watt district

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: Losinger Marazzi's own project page states under "Besonderheiten": "Das erste zertifizierte 2000-Watt-Areal der Schweiz." ("The first certified 2000-Watt district in Switzerland.") That is the only one of the five listed sources that makes the nationwide claim.
Caveat: The 'first in Switzerland' claim comes from the site's own developer. Swiss Engineering STV's write-up on the same project instead calls it "das erste Quartier in Zürich" that meets 2000-Watt-Gesellschaft targets — a narrower, city-level claim, not a national one.

Sources carrying this claim

Losinger Marazzi (developer)

Claim 3 clm-cf33e2e21ab4fc27 quantitative

Six groundwater wells and 215 geothermal probes drive 5 MW of ammonia heat pumps

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: ewz: "nun nebst sechs Grundwasserbrunnen 215 Erdwärmesonden mit einer Tiefe von je 220 Metern dafür, dass im Winter geheizt und im Sommer gekühlt werden kann", and "in der Energiezentrale von Greencity über vier Ammoniak Wärmepumpen mit einer Gesamtleistung von 5 MW auf das erforderliche Temperaturniveau von 35 °C erwärmt." Swiss Engineering STV independently confirms the same counts: "6 Grundwasser-Entnahmebrunnen ... 215 Erdwärmesonden à 220 m Tiefe (4 Felder)" and "4 Ammoniak WP/KM à total 5 MW Heizleistung".
Caveat: Swiss Engineering STV also lists 2 groundwater infiltration galleries alongside the 6 extraction wells, which the entry's snippet omits — not a contradiction, just a simplification.

Sources carrying this claim

ewz (operator)
Swiss Engineering STV

Claim 4 clm-ab3c0a62a4dbb478 quantitative

584 kWp of rooftop PV and a biogas boiler for peaks

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: Swiss Engineering STV gives the exact figure: "Die Photovoltaik-Anlage verteilt auf 10 Dächern ... Sie hat eine Leistung von insgesamt 584 kWp und ist in Ost-West Richtung aufgeständert." It also lists "1 Biogaskessel à 2 MW Heizleistung" used for redundancy and peak demand ("Redundanz sowie zur Deckung des Spitzenbedarfs"). The city's 2014 release corroborates the biogas-for-peaks role: "Für die Spitzenlast im Winter steht zusätzlich Biogas zur Verfügung."
Caveat: ewz's own current reference page rounds this down to "über 500 kWp installierte PV-Leistung" rather than citing 584 kWp specifically — not a contradiction (584 is indeed over 500), just a less precise figure from the operator itself.

Sources carrying this claim

Swiss Engineering STV
City of Zurich (authority)

Claim 5 clm-7cf116b8374d8082 quantitative

on a 30-year contract

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: ewz: "In Greencity verantworten wir aufgrund eines langfristigen Contracting-Vertrags über 30 Jahre das gesamte Wärme-, Kälte- und Stromnetz des Areals sowie die energietechnischen Anlagen."
Caveat: No claim-specific caveat recorded

Sources carrying this claim

ewz (operator)

Claim 6 clm-bfcf9a43978b7c39 quantitative

City projected ~1,800 t CO2 avoided per year

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: The city's December 2014 press release, announcing council approval of ewz's contracting budget, states: "Dank dieser umweltfreundlichen Energieversorgung lassen sich pro Jahr 1800 Tonnen CO₂ einsparen, was rund 37 Tanklastwagen Öl entspricht." This is explicitly framed as an expected saving from the approved concept, i.e. a projection at contracting stage, matching the entry's own "projected" framing.
Caveat: This is the 2014, contracting-stage projection. Swiss Engineering STV's later technical breakdown gives a slightly different, presumably more current, full-build-out figure for Greencity alone (1,900 t/year), and ewz's current reference page cites 2,400 t/year — but for the combined "Greencity & Areal West" area, which is larger than Greencity alone.

Sources carrying this claim

City of Zurich (authority)

Claim 7 clm-4aa5da53007077f3 quantitative

the district now houses ~2,000 residents and ~3,000 workplaces

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: Losinger Marazzi's current project page describes Greencity in the present tense: "Greencity beherbergt: 730 Wohnungen (ca. 2000 BewohnerInnen) 43 000 m2 Büroflächen (ca. 3000 Arbeitsplätze) 4500 m2 Hotel (ca. 350 Gäste)" ("Greencity houses: 730 apartments [approx. 2000 residents], 43,000 sqm of office space [approx. 3000 workplaces], 4,500 sqm hotel [approx. 350 guests]"). The site is described as largely complete, with only the last building (B6/Vergé) still under construction as of this reading.
Caveat: These are the developer's own approximate, self-reported figures on a project-marketing page, not an independent census. They also closely mirror the city's original 2014 construction target for the same district ("Wohnungen für 1500 bis 2000 Menschen sowie Raum für etwa 3000 Arbeitsplätze"), so "now houses" may reflect the site's planned near-final capacity as much as a precisely counted current occupancy.

Sources carrying this claim

Losinger Marazzi (developer)

Claim 8 clm-3afb3be8f4fbc613 quantitative

The federal 2000-Watt-Areal label Greencity pioneered was scrapped in 2024 for lack of demand

Published field: lesson · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: espazium, an independent trade-press outlet, reported: "Per 2024 macht die Behörde Schluss mit der Zertifizierung von 2000-Watt-Arealen." ("As of 2024 the authority is ending certification of 2000-Watt districts.") It gives the reason explicitly: "«Die zu geringe Nachfrage» bewegt nun das Bundesamt, die Finanzierung überraschend zu beenden" ("'Insufficient demand' is now moving the federal office to unexpectedly end the funding") — after 43 certified sites nationwide.
Caveat: This espazium article is dated 18 March 2022. It reports the federal energy office's announced plan to end the certification scheme "per 2024" via a harmonisation agreement signed that month — it documents the plan, not an after-the-fact confirmation that the scheme was actually discontinued on schedule in 2024.

Sources carrying this claim

espazium (trade press)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-22-evidence-baseline effective 2026-07-29 · created 2026-08-22

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:a6f01d595de4bd1f307f49ddbf538c41708a66cb82a3d78cc6837ef2b4dc4484

Revision history → Permanent version link → Machine-readable record → Evidence Constitution →

8: of 8 claims mapped
5: source dossiers
2: publication dates recorded
0: archives linked
0: exact locators
0: content captures hashed

Governance facts carried by the record

Operator: ewz (Elektrizitätswerk der Stadt Zürich); district developed by Losinger Marazzi
Actor types: utility
Funding model: utility
Funding description: ewz energy contracting, 30-year term
Cost: ≈CHF 18.45M (ewz energy plant)
Ownership: Not recorded
Decision rights: Not recorded
Exit conditions: Not recorded

5 source dossiers

ewz (operator) ewz.ch · 3 linked claims

Open original source ↗

Stable source ID: src-74787092410c9e8a
Publisher: Name not classified · ewz.ch
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-29
Dossier created: 2026-08-22
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Municipal utility's page: 30-year contracting, 4 NH3 heat pumps, groundwater as primary source, 215 borehole probes.
Descriptive only — not page/paragraph exact
Claims linked: clm-9dbc1c59b636032c
clm-cf33e2e21ab4fc27
clm-7cf116b8374d8082

City of Zurich (authority) stadt-zuerich.ch · 3 linked claims

Open original source ↗

Stable source ID: src-eb7c6f443b5ae6db
Publisher: Name not classified · stadt-zuerich.ch
Type / language: web-page · language not classified
Published: 2014-12-03
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-29
Dossier created: 2026-08-22
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
2014 media release approving ewz's CHF 18.45M investment; projects ~1,800 t CO2 saved per year.
Descriptive only — not page/paragraph exact
Claims linked: clm-9dbc1c59b636032c
clm-ab3c0a62a4dbb478
clm-bfcf9a43978b7c39

Swiss Engineering STV swissengineering.ch · 2 linked claims

Open original source ↗

Stable source ID: src-7aea118c4d767afb
Publisher: Name not classified · swissengineering.ch
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-29
Dossier created: 2026-08-22
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Independent technical breakdown: 6 extraction wells + 2 infiltration galleries, 215 probes at 220 m in 4 fields, 5 MW heat pumps, 584 kWp PV on 10 roofs, 2 MW biogas boiler.
Descriptive only — not page/paragraph exact
Claims linked: clm-cf33e2e21ab4fc27
clm-ab3c0a62a4dbb478

Losinger Marazzi (developer) losinger-marazzi.ch · 2 linked claims

Open original source ↗

Stable source ID: src-9b92547505343d62
Publisher: Name not classified · losinger-marazzi.ch
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-29
Dossier created: 2026-08-22
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
District figures and 2014-2026 realisation timeline; first certified 2000-Watt-Areal claim.
Descriptive only — not page/paragraph exact
Claims linked: clm-88ca8924cc222172
clm-4aa5da53007077f3

espazium (trade press) espazium.ch · 1 linked claim

Open original source ↗

Stable source ID: src-7b62afff4ae12913
Publisher: Name not classified · espazium.ch
Type / language: web-page · language not classified
Published: 2022-03-18
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-29
Dossier created: 2026-08-22
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
The federal 2000-Watt-Areal certificate was discontinued in 2024; Minergie-Areal and SNBS-Areal replace it.
Descriptive only — not page/paragraph exact
Claims linked: clm-3afb3be8f4fbc613

Known limits of this passport

Publisher names and source languages have not yet been classified; domains are recorded without guessing.
Existing source notes are descriptive locators, not page- or paragraph-exact citations.
A missing archive, publication date or content hash is shown as null rather than inferred.
The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.