HJ Ventilation Service A/S

Public limited companyCVR 30609425Odense SActive

HJ Ventilation Service A/S is a public limited company, based in Odense S, active in insulation installation, founded in 2007. Net profit rose 144% from 2019 to 2025, ending at DKK 2.5m. With 24 employees, the company is about 6 times larger than the industry median. Equity grew to DKK 12.5m in 2025.

PDF report Compare

Key figures · financial year 2025

Gross profitDKK 18.2m+20.5% vs. 2019

Net profitDKK 2.5m+143.8% vs. 2019

EquityDKK 12.5m+15.5% vs. 2019

Employees24latest month from CVR

What has changed

calculated from recorded figures and dates

Employees

2 fewer employees than a year earlier: 24 (08/2026) against 26 (08/2025).

Registrations, last 24 months

01/01/2025: Industry changed to Insulation installation (432300)

Calculated from the latest two annual reports in sequence and from registrations in CVR. A figure that is missing in either year gives no line, and we derive no figures.

Financial statements

Financial years 2018–2025 · amounts in DKK thousand

Equity and net profit

EquityNet profit

Financial figures for HJ Ventilation Service A/S
	2018	2019	2025	Change
Revenue	not stated	not stated	not stated	–
Gross profit	17,282	15,129	18,230	+20.5%
Operating profit (EBIT)	3,138	1,398	3,206	+129.3%
Profit before tax	3,059	1,330	3,166	+138.1%
Net profit	2,378	1,012	2,466	+143.8%
Total assets	20,505	18,202	19,069	+4.8%
Equity	10,818	10,830	12,513	+15.5%
Liabilities	9,528	7,295	–	–
Cash and cash equivalents	977	1,822	3,661	+100.9%
Average number of employees	29	28	23	−17.9%

Source: annual reports filed with the Danish Business Authority (XBRL). Figures for the company (not the group); change is the latest year against the year before. “–” means the figure is not stated in the annual report. Revenue is not stated for 2018, 2019, 2025: smaller companies may omit it, and we do not derive it from other figures. The register has no financial statements for 2020, 2021, 2022, 2023, 2024 (changed financial year or not filed).

Download the figures as CSV · free with an account, amounts in whole DKK

Compare with the industry (179 companies)

Gross profitMedian, the industry (179 companies)

Annual reports

3 financial years

Annual reports for HJ Ventilation Service A/S
Financial year	Period	Published	Figures for	Documents
2025	01/01/2025 – 31/12/2025	19/05/2026	The company	PDF not statedXBRL
2019	01/01/2019 – 31/12/2019	05/06/2020	The company	PDF XBRL
2018	01/01/2018 – 31/12/2018	04/06/2019	The company	PDF XBRL

The figures from all the annual reports are shown on this page. The documents themselves (PDF and XBRL, the machine-readable edition) are downloaded with a Pro account: sign in or create a free account, and then choose Pro. XBRL is the edition the figures on the page are read from.

Employees

monthly figures from CVR

Employees

Position in the industry

179 companies in the database

Comparison with the other companies in insulation installation based on the latest financial year.

Gross profitDKK 18.2mNo. 12 of 179

Better than 94% of the companies in the industry

EquityDKK 12.5mNo. 7 of 179

Better than 97% of the companies in the industry

Number of employees24No. 12 of 179

Better than 94% of the companies in the industry

Industry median: gross profit DKK 2.3m, net profit DKK 200k, equity DKK 720k, 4 employees.

Distribution of gross profit for 172 companies in the industry (latest financial year, logarithmic scale). Amber bar: where this company sits.

Compared with similar companies

size, age and company form

Rank among similar companies
Group	Gross profit	Equity
Companies with 20–49 employees9,922 companies in the comparison	No. 3,305of 9,892 Better than 67%	No. 2,586of 9,922 Better than 74%
Companies that are between 15 and 29 years old24,910 companies in the comparison	No. 3,691of 24,791 Better than 85%	No. 5,841of 24,909 Better than 77%
All companies of type A/S18,025 companies in the comparison	No. 6,365of 17,786 Better than 64%	No. 7,863of 18,024 Better than 56%

The rank is calculated among companies in the database with a figure for the latest financial year, and is shown only for groups of at least ten companies.

Compare with the industry

Insulation installation

Gross profit

HJ Ventilation Service A/SDKK 18.2m
CM Iso A/SDKK 106.6m
Persolit Entreprenørfirma A/SDKK 94.8m

Net profit

HJ Ventilation Service A/SDKK 2.5m
CM Iso A/SDKK 28.8m
Persolit Entreprenørfirma A/SDKK 20.4m

Equity

HJ Ventilation Service A/SDKK 12.5m
CM Iso A/SDKK 39.6m
Persolit Entreprenørfirma A/SDKK 105.9m

Employees

HJ Ventilation Service A/S24
CM Iso A/S108
Persolit Entreprenørfirma A/S314

Latest financial year per company. Choose up to three companies from the largest in the industry.

Owners and group

from the Public Ownership Register

Owners

Zitz Holding ApS100%

HJ Ventilation Service A/S

Management

4 active registrations

Executive management

Executive management at HJ Ventilation Service A/S
Name	Role	Appointed
Rene Zitz	Director	23/05/2011

Board of directors

Board of directors at HJ Ventilation Service A/S
Name	Role	Appointed
Lotte Eckhoff Zitz	Board member	23/05/2011
Rene Zitz	Board member	23/02/2012
Franz Josef Zitz	Chair of the board	20/04/2015

Auditor: VH Revision Registrerede Revisorer ApS
Founders: Knox 2007 A/S

Former management (6)

Former management at HJ Ventilation Service A/S
Name	Role	Appointed	Resigned
Hans Dahl Jakobsen	Director	21/05/2007	23/05/2011
Anne-Lise Jakobsen	Chair of the board	21/05/2007	23/05/2011
Karin Dahl Kristoffersen	Board member	21/05/2007	23/05/2011
Christina Dahl Jakobsen	Board member	21/05/2007	23/05/2011
Tom Bramminge Christensen	Chair of the board	23/02/2012	01/12/2014
Franz Josef Zitz	Board member	23/02/2012	19/04/2015

Signing rule: Selskabet tegnes af en direktør eller af to medlemmer af bestyrelsen i forening, hvoraf det ene bestyrelsesmedlem skal være bestyrelsesformanden, eller af den samlede bestyrelse

Address and production units

1 active production units

Grønvænget 3
5260 Odense S

Odense Municipality · Postcode 5260

Production units
Production unit	Address	Industry	Employees	P number
HJ VENTILATION SERVICE A/S	Grønvænget 3, Stenløse, 5260 Odense S	Insulation installation	24	1013349327

Purpose

Selskabets formål er produktion og handel med ventilationsanlæg og støjdæmpning samt løsning af alle slags service- og installationsopgaver på ventilationsområdet

The purpose is quoted from the register in Danish.

Changes year by year

25 registered events

32015

02016

02017

02018

12019

12020

02021

02022

02023

02024

12025

12026

20261 changeaccounts 1

19/05AccountsAnnual report for 2025 published

20251 changeindustry 1

01/01IndustryIndustry changed to Insulation installation (432300)

20201 changeaccounts 1

05/06AccountsAnnual report for 2019 published

20191 changeaccounts 1

04/06AccountsAnnual report for 2018 published

20153 changesaddress 1 · management 2

24/11AddressMoved to Grønvænget 3, Stenløse, 5260 Odense S
20/04ManagementFranz Josef Zitz appointed chair of the board
19/04ManagementFranz Josef Zitz stepped down as board member

20141 changemanagement 1

01/12ManagementTom Bramminge Christensen stepped down as chair of the board

20123 changesmanagement 3

23/02ManagementFranz Josef Zitz appointed board member
23/02ManagementTom Bramminge Christensen appointed chair of the board
23/02ManagementRene Zitz appointed board member

20117 changesmanagement 6 · ownership 1

23/05ManagementLotte Eckhoff Zitz appointed board member
23/05ManagementRene Zitz appointed director
23/05ManagementAnne-Lise Jakobsen stepped down as chair of the board
23/05ManagementHans Dahl Jakobsen stepped down as director
23/05ManagementKarin Dahl Kristoffersen stepped down as board member
23/05ManagementChristina Dahl Jakobsen stepped down as board member
01/03OwnershipZITZ HOLDING ApS registered as owner (100%)

20091 changeindustry 1

01/01IndustryIndustry changed to Anden bygningsinstallationsvirksomhed (432900)

20081 changeindustry 1

01/01IndustryIndustry changed to Manufacture of non-domestic cooling and ventilation equipment (282500)

20075 changesfounded 1 · management 4

21/05FoundedRegistered as HJ VENTILATION SERVICE A/S
21/05ManagementAnne-Lise Jakobsen appointed chair of the board
21/05ManagementHans Dahl Jakobsen appointed director
21/05ManagementKarin Dahl Kristoffersen appointed board member
21/05ManagementChristina Dahl Jakobsen appointed board member

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Same industry in Odense

CH Industri Bellinge ApS6 employees
Isolerings-gruppen Odense A/S6 employees
Røjsmose Isolering ApS3 employees
Lifa ventilation ApS3 employees
Aros Isolering Fyn ApS2 employees

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Same people in management

Schmiedmann Odense A/Svia Tom Bramminge Christensen
Næsby Malerfirma A/Svia Tom Bramminge Christensen
Fyns Galvanisering A/Svia Franz Josef Zitz
BYRG Invest ApSvia Tom Bramminge Christensen
Advokatfirmaet Ret & Råd Fyn A/Svia Tom Bramminge Christensen
Askov Construction ApSvia Tom Bramminge Christensen

Largest in the industry

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Source and updates

The information comes from the Danish Central Business Register (Danish Business Authority) and from annual reports filed with the Danish Business Authority. Last synchronised 24/10/2026. The company is protected against advertising; contact details are not shown, and the data must not be used for marketing.

View in CVR Report a correction