Henning Mortensen a/s

What Henning Mortensen a/s does

Henning Mortensen a/s is a Danish multi-trade technical contractor founded in 1959 and headquartered at Lillehøjvej 38, 8600 Silkeborg, with additional offices in Aarhus (two locations) and Herning. The company delivers integrated technical installations across nine disciplines: VVS (plumbing and heating), EL (electrical), ventilation, sprinkler, alarm and fire safety (Alarm & Brand), sheet metal work (Blik), technical contracting (Teknikentreprise), climate and energy (Klima og Energi), and PE-welding (PE-svejsning). Customer logos span public-sector clients (Herning Kommune, Aarhus Kommune, Banedanmark), commercial real estate (UNITY Aarhus / Nordstern, College360), construction (MT Højgaard), sports and entertainment (Silkeborg IF / JYSK Park), energy (Foersum Bioenergi), and financial services (Aberdeen Standard), indicating a diversified mix across East/Central Jutland and nationwide Denmark.

The business model is project- and contract-based: revenue is generated through technical installation contracts, recurring service and warranty work on long-life building and infrastructure assets, and increasingly through climate and energy retrofit projects (solar, EV charging, energy optimization). The firm operates as a private, family-owned enterprise with multi-generational continuity — Hans Mortensen serves as Chairman, Anna Mortensen heads Finance, Søren Blønd-Mortensen is Department Manager, and Johnny Sørensen is Director. The company holds ISO 9001:2015 certification alongside DBI approvals (ABA, AIA, AVS) and F&P certifications, qualifying it for regulated fire-safety, sprinkler, and plumbing installations. Sister companies HM-Ventilation a/s and VVS & El Experten extend the group's reach into specialized ventilation and retail trade segments.

With a headcount of more than 200 employees, the firm has earned recognition including Silkeborg CSR-pris 2020, Silkeborg Arkitekturpris 2021 (Sølyst project), and Årets Lærlingevirksomhed 2022 (apprentice employer of the year). The strategic posture combines geographic expansion across East/Central Jutland, service-line broadening into sustainability-driven technical work, and continued investment in apprenticeship pipelines — positioning the company as an established mid-sized multi-trade contractor with stable public-sector and developer relationships rather than as a high-growth challenger.

Name

Henning Mortensen a/s

Legal name

Henning Mortensen a/s

Website

https://henning-mortensen.dk

Company type

Private

Founded year

1959

Operating status

Operating

Headcount range

51–100 employees

Short description

Henning Mortensen a/s is a Danish multi-trade technical contractor (founded 1959, 200+ employees) delivering plumbing, electrical, ventilation, sprinkler, fire/security, sheet metal, and climate/energy installations from Silkeborg, Aarhus, and Herning to public, commercial, real estate, and industrial clients across Denmark.

Ownership category

akta.pro rank

Product category

Multi-trade technical building installation and contracting (VVS, EL, ventilation, sprinkler, security, sheet metal)

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

Construction - Special Trade Contractors (1700)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industry

Industrial/Process Piping & Mechanical Contracting (IMAFALAG)

Keywords

• Technical installation contracting
• Building services engineering
• Fire safety systems
• Sprinkler installation services
• Multi-trade construction services

Headquarters

HQ city

Silkeborg

HQ country

Denmark

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Technical installation services (VVS, EL, Ventilation, Sikring, Blik, Sprinkler): Henning Mortensen a/s generates revenue by providing technical installation services as a contractor, operating as both a specialist trade contractor (fagentreprise) and a coordinating technical contractor (teknikentreprise/hoved-/totalentreprise). Revenue is project-based and earned through competitive tendering and direct client engagements with building owners, municipalities, developers, and general contractors for new-build and renovation projects across Denmark.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

Henning Mortensen a/s is a Danish multi-trade technical contractor providing integrated installation services in VVS (plumbing, heating, sanitation), EL (electrical), ventilation, sprinkler, alarm & fire safety (ABA, AIA, AVA, ADK, TVO), and blik (sheet metal and roofing) across new-build, renovation, and service projects. The company operates as specialist trade contractor (fagentreprise), main contractor (hovedentreprise), or coordinating total technical contractor (teknisk totalentreprise), serving municipalities, developers, general contractors, and building owners primarily in East and Central Jutland, Denmark.

Product overview

Henning Mortensen a/s is a multi-trade technical contractor that has consolidated technical trades under one roof. The company operates as both a local craftsman and professional technical contractor with the ability to deliver both trade-specific and cross-disciplinary solutions. The core portfolio consists of eight integrated service areas: VVS (plumbing/heating/sanitation), EL (electrical), Ventilation (provided through sister company HM-Ventilation a/s), Sprinkler (fire suppression systems), Alarm & Brand/Sikring (security and fire safety including AIA, ABA, AVA, ADK, TVO), Blik (sheet metal/roofing), Teknikentreprise (technical contracting/coordination), and Klima og energi (climate/energy solutions including heat pumps, solar, EV charging). Additional specialty services include PE plastic welding for district heating and biogas applications. The company coordinates all technical installations in-house, enabling efficient construction processes through integrated project delivery.

Differentiator

Problem solved

Functional benefit

Products and services

• VVS (Plumbing, Heating, Sanitation) Complete plumbing, heating, and sanitation installation and service, performed as fag-, hoved-, or totalentreprise for residential, commercial, and industrial projects since 1959.
• EL (Electrical Installation) Full electrical installation services ranging from smaller private customer tasks to complex commercial and industrial installations, including EL contracts for new construction, renovation, and ongoing service.
• Ventilation Design, installation, and servicing of all types of ventilation solutions under fag-, hoved-, and totalentreprise contracts, delivered through sister company HM-Ventilation a/s.
• Sprinkler Systems Design, installation, and service of automatic sprinkler systems (wet, dry, and pumped-reservoir) for warehouses, parking structures, high-rise residential, schools, care centers, hotels, and offices, with ISO 9001 certification and DBI authorization.
• Alarm & Fire Safety (Sikring) Integrated security and fire safety installations covering intrusion alarm (AIA), fire alarm (ABA), voice evacuation (AVA), access control (ADK), and video surveillance (TVO) using the NOX/SIMS management platform; available with outright ownership for private customers and managed service options.
• Blik (Sheet Metal and Roofing) Sheet metal, roofing, and facade services covering gutters, downpipes, dormer flashing, roofs, and facades (including copper, zinc, and natural slate), produced in the in-house Silkeborg workshop with specialty bending machines.
• Teknikentreprise (Technical Contracting / Coordination) Coordinated delivery of all technical installations, with most trades (VVS, EL, ventilation, sprinkler, security, blik) executed in-house, providing a single contracting entity and reducing client coordination overhead.
• Klima og Energi (Climate and Energy Solutions) Climate and energy solutions including heat pumps (Vølund), ground source heating, solar panels, EV charging stations, LED lighting, energy optimization, and DGNB-aligned certified construction services.
• PE-svejsning (Polyethylene Pipe Welding) Polyethylene (PE) pipe welding for district heating networks, biogas plants, and industrial pipeline infrastructure, with welding capability from Ø32 to Ø315.

Quantifiable outcome

• ~1 working day ABA system replacement (Funder Plejecenter, 180 units) with DBI approval next morning
• +8 more outcomes

Named customers19 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature11 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• HM-Ventilation a/scoreStrategic or Co-development PartnerHM-Ventilation a/s is a sister company of Henning Mortensen a/s, specializing exclusively in ventilation installations. The two companies frequently collaborate on multi-trade technical projects, with HM-Ventilation handling ventilation scope while Henning Mortensen handles VVS, EL, sprinkler, and security. Joint projects include Poul Munk A/S (Silkeborg, 2020), UNITY Aarhus high-rise (2020-2023), Gefion Telegrafkollegiet (Ballerup, 2020), and Sports- og Kulturcampus Aarhus (2020-2021). HM-Ventilation operates its own careers page at hm-ventilation.dk.
• VVS & El ExpertenminorChannel Partner/ Reseller/ DistributorVVS & El Experten is a sister company that handles VVS work while Henning Mortensen handles electrical scope, as demonstrated on the Torvehuset project in Galten (2021-2022). The partnership enables Henning Mortensen to offer combined VVS and EL services on projects where both trades are required.
• LPH Byg a/sminorStrategic or Co-development PartnerLPH Byg a/s served as the main contractor (totalentreprenør) for the renovation and modernization of Ry Højskole (2017-2019), with Henning Mortensen a/s as a subcontractor handling the sheet metal trade. The project involved slate roofing, copper/zinc detailing, and ventilation installation across multiple building phases.
• MT HøjgaardcoreStrategic or Co-development PartnerMT Højgaard served as the main contractor (hovedentreprenør) for the Sports- og Kulturcampus project in Brabrand, Aarhus (2020-2021). Henning Mortensen a/s was engaged as specialist electrical and security subcontractor for this 8,500 sqm community facility. MT Højgaard is a major Danish construction group.
• Wils A/SminorStrategic or Co-development PartnerWils A/S served as the main contractor for the construction of Ny Hal 2 in Sejs-Svejbæk (2021-2022), with Henning Mortensen a/s as specialist subcontractor for VVS, electrical, and ventilation on this 1,600 sqm sports hall for Silkeborg Kommune.
• Stender Entreprise A/SminorStrategic or Co-development PartnerStender Entreprise A/S served as main contractor for the conversion of Gefion Telegrafkollegiet (Ballerup, 2020), where Henning Mortensen a/s delivered EL, VVS, ventilation, and ABA as specialist trades in collaboration with sister company HM-Ventilation.
• Nordstern (formerly KPC)coreStrategic or Co-development PartnerNordstern (formerly KPC) was the main contractor and developer for UNITY Aarhus (94m, 28-floor residential tower, 23,000 sqm, 652 units), with Henning Mortensen a/s as the sprinkler and technical enterprise contractor. The project also involved collaboration with sister company HM-Ventilation. UNITY Aarhus achieved DGNB Sølv certification.

Scale indicators6 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Instalco: Swedish multi-trade technical installation group with Nordic-wide operations in electrical, VVS, HVAC, and industrial piping. Operates a decentralized model of local multi-trade units comparable in structure and service mix to Henning Mortensen.
• MT Højgaard: Major Danish construction and civil engineering group that acts as main contractor (hovedentreprenør) on projects where Henning Mortensen serves as specialist trade subcontractor (e.g., Sports- og Kulturcampus Brabrand). Larger and broader incumbent overlapping in technical installations.
• Assemblin: Nordic multi-discipline technical installation and service contractor with operations in Sweden, Norway, and Finland. Comparable service portfolio (electrical, VVS, ventilation, security, sprinklers) at significantly larger scale across multiple Nordic markets.
• Caverion: Finnish-headquartered building solutions and technical installation provider with a Danish subsidiary. Offers integrated HVAC, electrical, fire safety, and security across commercial and public buildings — comparable service portfolio at larger scale.
• Bravida: Nordic multi-trade technical installation and service contractor (Swedish parent, Danish subsidiary) with broad coverage in electrical, VVS, HVAC, and sprinkler. Larger scale and broader Nordic footprint make it a broad incumbent peer.

Regional players

• GK Gruppen: Norwegian multi-trade technical contractor focused on ventilation, electrical, plumbing, and building automation. Comparable multi-trade technical contracting model but operates in Norway rather than Denmark, making it a regional peer rather than a direct competitor.
• YIT: Finnish building solutions and technical services group with a Danish presence. Offers HVAC, electrical, and building systems services comparable to Henning Mortensen's portfolio, though focused primarily on the Finnish market.

Direct peers

• Wicotec Kirkebjerg: Danish multi-trade technical contractor (part of MT Højgaard group) delivering VVS, electrical, ventilation, sprinkler, and technical enterprise services. Direct peer in scope and certifications (ISO, DBI), competing on the same public and private tenders in Denmark.
• Kemp & Lauritzen: Major Danish multi-trade technical contractor offering electrical, VVS, ventilation, and automation services across Denmark. Highly comparable in scope, customer base (municipal, commercial, industrial), and technical contracting model to Henning Mortensen.

Emerging players

• Minimax: Danish fire protection specialist with deep sprinkler and ABA expertise. Comparable in sprinkler engineering, installation, and service scope to Henning Mortensen's sprinkler line, but narrower portfolio focused on fire protection.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/HenningMortensenAs
• LinkedInlinkedin.com/company/henning-mortensen-a-s

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Henning Mortensen a/s