Trade of steam, hot water and cooled air companies in Köln

Köln ·Currently listed companies in the Trade of steam, hot water and cooled air industry headquartered in Köln.

124 companies · 1–20 of 124

A & H Körperkälte GmbH GmbH · HRB 118499 Köln (Cologne) · 2024
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AB-Isoliertechnik-W/K/S/B GmbH GmbH · HRB 87971 Köln (Cologne) · 2011
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Ampera Energy Solutions GmbH GmbH · HRB 111236 Köln (Cologne) · 2022
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AnDi.l.Sanierungssysteme GmbH GmbH · HRB 117521 Köln (Cologne) · 2024
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Anlagenmechanik Daniel Müller GmbH GmbH · HRB 58050 Köln (Cologne) · 2006
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Arri Well e.K. e.K. · HRA 14826 Köln (Cologne) · 2002
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B + S Kälte-Klimatechnik Spangenberg GmbH GmbH · HRB 14128 Köln (Cologne) · 1984
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BaConi Industrieservice Gesellschaft mit beschränkter Haftung GmbH · HRB 123090 Köln (Cologne) · 2018
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Biddle GmbH GmbH · HRB 22703 Köln (Cologne) · 1958
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Biogasanlage Haßleben GmbH GmbH · HRB 7534 Neuruppin · 2006
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Biogasanlage Sandbeiendorf GmbH GmbH · HRB 115258 Stendal · 2006
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Br@inTop GmbH GmbH · HRB 34554 Köln (Cologne) · 2000
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Brandi Consult GmbH GmbH · HRB 30347 Köln (Cologne) · 1998
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BRUNATA-METRONA GmbH GmbH · HRB 88488 Köln (Cologne) · 2016
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Brüßeler Ortungstechnik DUS GmbH GmbH · HRB 125711 Köln (Cologne) · 2025
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Burkard Kentenich Sanitär- und Heizungs-GmbH GmbH · HRB 25946 Köln (Cologne) · 1995
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Castelletto UG (haftungsbeschränkt) UG (haftungsbeschränkt) · HRB 117000 Köln (Cologne) · 2010
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ClimaLevel Energiesysteme GmbH GmbH · HRB 74542 Köln (Cologne) · 2012
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CO2OLTEC Kältetechnik Deutschland GmbH GmbH · HRB 56371 Köln (Cologne) · 2005
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Concept Energy Düsseldorf GmbH & Co. KG GmbH & Co. KG · HRA 37912 Köln (Cologne) · 2020
267c66d401…

All industries in Köln

Live API

GEThandelsregister.ai/api/v1/search-organizations

?limit=20

&filters={"city":"Köln","industry_code":"35.30.3","industry_scheme":"WZ2025"}

# pip install handelsregister
from handelsregister import Handelsregister

client = Handelsregister(api_key="YOUR_API_KEY")  # or set HANDELSREGISTER_API_KEY
page = client.search_organizations(
    filters={
        "city": "Köln",
        "industry_code": "35.30.3",
        "industry_scheme": "WZ2025"
    },
    limit=20,
    skip=0,
)
print(page["total"])
for item in page["results"]:
    print(item["name"], item["registration"]["register_number"])

// npm install handelsregister
import { Handelsregister } from 'handelsregister';

const client = new Handelsregister('YOUR_API_KEY'); // or set HANDELSREGISTER_API_KEY
const page = await client.searchOrganizations({
  filters: {
      "city": "Köln",
      "industry_code": "35.30.3",
      "industry_scheme": "WZ2025"
  },
  limit: 20,
  skip: 0,
});
console.log(page.total);
for (const item of page.results) {
  console.log(item.name, item.registration.register_number);
}

// npm install handelsregister
const { Handelsregister } = require('handelsregister');

const client = new Handelsregister(process.env.HANDELSREGISTER_API_KEY);
(async () => {
  const page = await client.searchOrganizations({
    filters: {
        "city": "Köln",
        "industry_code": "35.30.3",
        "industry_scheme": "WZ2025"
    },
    limit: 20,
    skip: 0,
  });
  console.log(page.total);
  for (const item of page.results) {
    console.log(item.name, item.registration.register_number);
  }
})();

curl 'https://handelsregister.ai/api/v1/search-organizations?limit=20' \
  -H 'x-api-key: YOUR_API_KEY' \
  -G --data-urlencode 'filters={"city":"Köln","industry_code":"35.30.3","industry_scheme":"WZ2025"}'

{
    "results": [
        {
            "entity_id": "<32-char hex>",
            "name": "<string>",
            "registration": {
                "court": "<string>",
                "register_type": "<string>",
                "register_number": "<string>"
            },
            "address": {
                "house_number": "<string>",
                "street": "<string>",
                "postal_code": "<string>",
                "city": "<string>",
                "county": "<string>",
                "state": "<string>",
                "country": "<ISO country>",
                "coordinates": {
                    "latitude": "<float>",
                    "longitude": "<float>"
                }
            },
            "registration_date": "<ISO date>",
            "purpose": "<string>"
        }
    ],
    "total": "<int>",
    "meta": {
        "request_credit_cost": "<int>",
        "credits_remaining": "<int>"
    }
}

results[]

entity_id string

Stable 32-char hex identifier. Pass straight into /fetch-organization as `q`.

name string

Registered company name.

registration object

address object

Postal address with street, house_number, postal_code, city, county, state, country and coordinates (latitude/longitude).

registration_date date

Initial entry into the commercial register (ISO date).

purpose string

Stated business purpose (Unternehmensgegenstand).

top-level

total integer

Total result count for pagination.

meta.request_credit_cost integer

Credits actually charged for this call.

meta.credits_remaining integer

Account credit balance remaining after this call.

Location · Industry · Legal form · Full-text

Filters & master data — via search-organizations

City, industry, legal form, registration date: every argument combinable through the filters parameter. One REST endpoint, every German company.

Location & geo Filter by city, postal code, state and county through city, postal_code, state and county.
Industry (WZ2025) Industry segmentation via the official WZ2025 codes — industry_code combined with industry_scheme.
Legal form GmbH, AG, KG, OHG and more via legal_form_code.
Company size bs_company_size_category – small, medium, large based on balance-sheet totals.
Active status Restrict to active entries or include deleted companies via active.
Registration date Date ranges via registration_date_from and registration_date_to.
Full-text search Free-text query via the q parameter (min. 2 characters).
Pagination skip and limit (up to 30 results per call) for deep lists.
Master data per result entity_id, name, address, registration and registration_date – pass entity_id straight to /fetch-organization.

Run every filter live with an API key. Get an API key →

Code · AI-Agents · No-Code · Workflows

Drops into any stack

The search-organizations API speaks every mainstream client: REST, Python, Node, MCP for AI agents, n8n and webhook platforms.

REST API Simple GET request with the X-API-KEY header and JSON-encoded filters. Python requests, httpx or your favourite library — pass filters via json.dumps. Node.js fetch or axios with URLSearchParams. Works in edge, worker and browser runtimes. MCP Server Directly in Claude, Cursor or any MCP-aware AI client as the search_organizations tool. n8n Pre-built custom node for workflow automation — city, industry and size as filter inputs. Webhook Callable from Zapier, Make or any other webhook platform.

This list in your app

Grab an API key and filter every German company by city, industry, size and more — straight from your application. One REST endpoint, every result.

Get an API key

Filters & master data — via search-organizations

Drops into any stack

This list in your app

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