Poul Sejr Nielsen A/S

What Poul Sejr Nielsen A/S does

Poul Sejr Nielsen A/S (PSN) is a privately held Danish multi-trade technical contractor founded in 1956 and headquartered in Birkerød, Denmark. The company delivers integrated VVS (plumbing, heating, ventilation), EL (electrical), and Tag & Facade (sheet metal, roofing, cladding) services through approximately 250 employees, 130 service vehicles, and a 1,000 sqm in-house sheet metal workshop with CNS-controlled profile manufacturing. Following a 2011 management buyout by current CEO Michael Madsen and director Peter Bentsen, PSN has expanded via acquisitions of Fredensborg Teknik A/S (2018) and Erik Nielsen VVS A/S (2021), and through the launch of Næstved operations in 2020 (VVS) and 2023 (EL), bringing service revenue to more than 50% of total turnover.

PSN's service offering spans installation projects (main contracts, major contracts, technical contracts, trade contracts), recurring service and maintenance agreements, energy optimisation (district heating conversion, heat pumps, solar PV, ground-source heat), and 24/7 emergency call-out. Pricing is unit-based with published hourly rates (e.g., journeyman DKK 737/hour, technician DKK 980/hour) and fixed all-inclusive district heating conversion packages starting from DKK 40,000. Customers include housing associations (FSB, BO-VITA, Boligselskabet Nordsjælland), municipalities (Københavns Kommune, Fredensborg Kommune, Allerød Kommune), utilities (Næstved Fjernvarme, Vestforbrænding, Egedal Fjernvarme, E.ON, Forsyning Helsingør), commercial developers (CASA, H.S. Kryolitentreprise), and individual homeowners served via online booking portals and service agreements.

Revenue is generated through four streams: project-based installation contracts (one-time), recurring service agreements (subscription), product sales with installation (one-time), and time-based labour and emergency call-out (usage-based). The company holds ISO 9001, ISO 14001, AAA Tekniq, and DGNB-certified project credentials, runs an in-house PSN Academy training programme with 35 apprentices, and operates an AI-trained CO2 footprint model that has published full Scope 1/2/3 emissions for 2024 (6,350 tCO2e). PSN describes itself as "Nordsjællands største teknikhus" (North Zealand's largest technical house) and serves North Zealand, Greater Copenhagen, and the Næstved/South Zealand area.

Name

Poul Sejr Nielsen A/S

Legal name

Poul Sejr Nielsen A/S

Website

https://psn.dk

Company type

Private

Founded year

1956

Operating status

Operating

Headcount range

101–250 employees

Short description

Poul Sejr Nielsen A/S is a Danish multi-trade technical contractor delivering VVS, electrical, and sheet metal services for private, commercial, and public customers across North Zealand, Greater Copenhagen, and Næstved. Founded 1956, the firm employs ~250 staff across 6 locations and 130 service vehicles.

Ownership category

akta.pro rank

Product category

Building Technical Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Plumbing, Heating, and Air-Conditioning Contractors (23822), Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers (423720)

SIC

Electrical Work (1731), Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industries

HVAC System Replacement & Change-Outs (HSAOAGAB), Heat Pump & Smart HVAC Controller Integration (HSAOANAD), Heat Pump Repair & Maintenance (HSAOAHAD)

Keywords

• Plumbing and heating services
• Electrical installation services
• Sheet metal roofing
• District heating conversion
• Building technical contracting

Headquarters

HQ city

Birkerød

HQ country

Denmark

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Installation and construction projects (Entrepriser): One-time project-based revenue from technical installation contracts including VVS, electrical, and sheet metal work on new build and renovation projects. Covers main contracts (hovedentreprise), major contracts (storentreprise), technical contracts (teknikentreprise), and trade contracts (fagentreprise). Revenue generated through competitive tendering and direct negotiations with property developers, housing associations, municipalities, and private clients.
2. Service and maintenance agreements: Recurring service revenue from service agreements covering ongoing maintenance of VVS, electrical, and building systems. Includes both residential and commercial service contracts, offering regular inspection, troubleshooting, and preventive maintenance as a retainer.
3. Product sales with installation: Revenue from sale of equipment including district heating units, solar panels, heat pumps, electric vehicle chargers, lighting, and sanitary ware, combined with professional installation services. Customers purchase products directly through PSN's online shop or as part of service quotes.
4. Time-based labour and call-out services: Hourly billed labour for service visits, troubleshooting, and repairs. Minimum call-out fees apply. Emergency call-out (vagtudkald) available 24/7 at premium rates. Revenue from individual time-and-materials engagements for both private and commercial customers.

Pricing tiers

Go-to-market motion2 records

Distribution channels6 records

Marketing channels8 records

Core offering

Poul Sejr Nielsen A/S is a multi-trade Danish technical contractor offering plumbing, heating, electrical, and sheet metal/roofing installation and maintenance services. The company serves private homeowners, commercial clients, and the public sector, and increasingly delivers energy transition solutions including district heating conversions, heat pumps, solar panels, and EV charging infrastructure. It operates from offices in Birkerød and Næstved with ~250 employees and a 130-vehicle service fleet.

Product overview

Poul Sejr Nielsen A/S is a multi-trade technical contractor offering a bundled services portfolio under one roof. The core offering spans three disciplines: EL (electrical installations), VVS (plumbing, heating, and ventilation), and Tag & Facade (sheet metal, roofing, and cladding). These are complemented by a suite of energy solutions — Solceller (solar panels), Varmepumper (heat pumps), Fjernvarme (district heating), Jordvarme (geothermal), Solvarme (solar thermal), and Ladestander (EV charging stations) — which are delivered as total solutions in partnership with selected suppliers. Supporting services include Serviceaftaler (service agreements), EL/VVS-tjek (inspections), Energioptimering (energy optimization), Ventilation, and Typehusinstallation (model home installations). The company operates primarily from Birkerød (headquarters) and Næstved, serving North Zealand, Greater Copenhagen, and the Næstved area, with approximately 250 employees and 130 service vehicles.

Differentiator

Problem solved

Functional benefit

Brands

• PSN-akademiet: Internt uddannelsesakademi bestående af lærlingeakademi, læresvendeuddannelse, mentorordning samt efteruddannelse og certificering af montører og funktionæransatte.

Products and services

• Plumbing and Heating Services (VVS)

Quantifiable outcome

• Gadehavegård housing project: 10% energy savings on heating bills achieved through auto-tuning intelligent heating control overlay
• +8 more outcomes

Named customers14 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• VestforbrændingcoreStrategic or Co-development Partner · 14 May 2024PSN won a major district heating agreement in Denmark's largest and most ambitious district heating project with Vestforbrænding, one of Denmark's largest waste-to-energy and district heating companies. The project covers large-scale district heating unit installations.
• Egedal Fjernvarme and E.ON DanmarkcoreStrategic or Co-development Partner · 14 December 2022PSN won the framework agreement with Egedal Fjernvarme and E.ON Danmark for the supply and installation of district heating units in Egedal and Frederikssund municipalities. The agreement enables PSN to expand its district heating operations in the eastern part of the region.
• Næstved FjernvarmecoreStrategic or Co-development Partner · 1 January 2019PSN won an 8-year framework agreement with Næstved Fjernvarme in 2019, serving as the basis for establishing the Næstved VVS department in 2020. The agreement covers district heating installation work across the Næstved area, including gas-to-district-heating conversions, oil-to-district-heating conversions, and district-to-district conversions.
• Vølund (Vølund Varmeteknik)coreTechnology or IntegrationKey supplier of ground-source heat pump systems for residential and commercial installations. Vølund is a Danish manufacturer of heat pumps. PSN uses Vølund products as a key supplier for jordvarme (ground heat) projects.
• Gastech Energi (Ariston Thermo Group / Elco)coreTechnology or IntegrationGastech Energi, owned by Ariston Thermo Group and representing Elco and Geminox brands, is a key partner for gas boiler, heat pump, and solar thermal products. Gastech provides connected IoT-enabled products with remote diagnostics capability. PSN installs and services Gastech/Elco products and offers Gastech service agreements.
• Bedre Bad - Bedre EnergicoreChannel Partner/ Reseller/ DistributorPSN is a member of the nationwide Bedre Bad - Bedre Energi chain, which specialises in bathrooms, utility rooms, and energy improvements. PSN's staff are certified as energivejledere (energy advisors) and vådrumsinstallatører (wet-room installers) through this network, providing standardised quality assurance to customers.
• InterForce (Danish Armed Forces)minorStrategic or Co-development PartnerPSN is a member of InterForce, the programme facilitating cooperation between Danish businesses and the military (Forsvaret, Hjemmeværnet, Beredskabsstyrelsen). PSN supports employees who serve in reserve forces and gains access to knowledge and networks that strengthen business operations.
• Karl Popp (environmental remediation)minorImplementation/ SI/ Consulting PartnerEnvironmental remediation firm partnered with PSN for asbestos point remediation work during the Glostrup Vestergård project. Karl Popp handled the specialised asbestos removal required during valve replacements in technical rooms and crawl spaces.
• CASA A/ScoreStrategic or Co-development PartnerMain contractor for the Mjølnerparken comprehensive neighbourhood renewal project on Nørrebro, Copenhagen. PSN executing VVS, ventilation, and blikkenslager packages as trade contractor under CASA's main contract with BO-VITA.
• U/NORD (Erhvervsskolen North Denmark)coreStrategic or Co-development PartnerPSN developed a journeyman trainer (læresvend) education programme in partnership with U/NORD vocational school. The first cohort of 15 journeymen completed the programme and received læresvend certificates, improving trainer quality for PSN's apprentice programme.

Scale indicators15 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Caverion Danmark A/S: Nordic provider of building technology solutions (HVAC, electrical, plumbing, automation, security). Comparable service/maintenance revenue model and large-project delivery; substantially larger parent (Caverion Corporation) with international reach.
• Bravida Danmark A/S: Nordic technical installation and service contractor (heating/plumbing/electrical/fire/security) owned by Bravida AB. Directly comparable in multi-trade service contracts and recurring maintenance revenue; meaningfully larger with broader geographic footprint.
• Kemp & Lauritzen A/S: Major Danish multi-trade contractor covering EL, VVS, ventilation, automation, and energy solutions with national coverage and 1,500+ employees. Most directly comparable Danish MEP contractor in business model and customer mix (a PSN enterprise manager hire previously worked at Kemp & Lauritzen).
• ENCO A/S: Danish HVAC and energy solutions specialist with nationwide service network. Comparable focus on heating systems, service agreements, and energy optimisation; a PSN enterprise manager hire previously worked at ENCO.
• Østergaard VVS A/S: Danish VVS contractor serving residential and commercial customers in Greater Copenhagen and Zealand. Comparable in service-agreement model and district-heating conversion capability; smaller scale than PSN.
• Wicotec Kirkwall A/S: Danish technical contractor delivering EL, VVS, ventilation, and energy solutions to public-sector and housing clients. Closest mid-sized direct competitor in multi-trade contracting and social-housing project delivery.

Broad incumbents

• Per Aarsleff A/S: Large Danish infrastructure and construction group with technical installations as part of broader portfolio. Overlaps with PSN on large institutional projects but operates across many more segments (civil engineering, ground engineering, offshore foundations).
• NCC Danmark A/S: Nordic construction and property-development company with a building-services division covering VVS, EL, and HVAC. Competes for large institutional framework contracts in Denmark; much broader portfolio than PSN.
• MT Højgaard Danmark A/S: Major Danish contractor with technical installations among a much broader construction portfolio. Competes for the same institutional tenders as PSN but as part of a multi-segment national group rather than a specialised multi-trade house.

Others

• Solar Danmark A/S: Danish technical wholesaler distributing plumbing, heating, electrical, and lighting products to installers. Adjacent to PSN as a supplier-channel peer (PSN's Profilsalg.dk subsidiary operates in a similar profile-distribution space) rather than a direct competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/psn_dk
• Facebookfacebook.com/psn.dk
• LinkedInlinkedin.com/company/poulsejrnielsenas
• Instagraminstagram.com/psn_dk

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries3 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 Poul Sejr Nielsen A/S