What NB Ventilation does

NB Ventilation A/S is a Danish custom-build manufacturer of industrial air handling units (AHUs) and ventilation systems, founded in 1972 and headquartered in Aalborg Øst, Denmark. The company designs and assembles ventilation equipment across five heat-recovery technologies—rotary (up to 90% efficiency), double cross-flow (>85%, with airflows up to 150,000 m³/h), cross-flow (73–78%), counterflow (80–95%), and liquid-coupled coil—delivered through indoor (NBI) and outdoor (NBU) unit series, with ATEX-certified explosion-proof variants for hazardous (Zone 0–22) environments. Units integrate two automation packages—Danfoss ECL Comfort A315 and OJ Electronics Air2—supporting Modbus and BACnet communication and web-based monitoring. The company operates from a roughly 5,000 m² production facility with approximately 40 employees.

The business serves a diversified enterprise customer base across healthcare (Aalborg Sygehus, Rigshospitalet Oslo, Copenhagen Heart Center), pharmaceutical (Novo Nordisk), food processing (Danish Crown, Royal Greenland), seafood processing (Scandic Pelagic), power generation (Avedøreværket), and defense (Forsvaret/Danish Armed Forces). Revenue is generated through project-based custom unit sales on multi-year contracts, supplemented by spare parts and third-party-verified Environmental Product Declaration (EPD) documentation. Distribution combines direct enterprise sales engineers with an installer partner channel; the geographic footprint centers on Denmark, with export to Norway and re-export to broader European and American markets.

In December 2024, NB Ventilation received growth capital from Blue Equity, marking a transition from family-only ownership (Gerhardt family since 2003) toward a partnership to accelerate energy-efficient product development and expand in complex industrial installations. Operational momentum in 2025 includes the acquisition of EPD-generator software (July 2025), the launch of project-specific EPDs (August 2025), an installation project executed in Lyon, France (September 2025), and new sales-engineering and apprenticeship hires.

Name

NB Ventilation

Legal name

NB Ventilation A/S

Website

https://nbventilation.dk

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

11–50 employees

Short description

NB Ventilation A/S is a Danish custom-build manufacturer of industrial air handling units and heat-recovery ventilation systems, founded 1972, serving enterprise customers across healthcare, pharma, food processing, defense, and energy with project-based solutions and ATEX-certified variants.

Ownership category

akta.pro rank

Product category

Industrial HVAC Ventilation Equipment

NAICS

Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (3334)

SIC

Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Fans, Blowers & Ventilation Units (Supply/Exhaust/Inline) (IMADANAB)

akta.pro secondary industry

Indoor Air Quality (IAQ) Monitoring & Ventilation Optimization (BPABAGAI)

Keywords

• Custom air handling units
• Heat recovery ventilation
• Industrial HVAC systems
• ATEX ventilation equipment
• Energy-efficient ventilation

Headquarters

HQ city

Aalborg

HQ country

Denmark

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Ventilation Unit Sales: Sale of custom-built ventilation units tailored to customer specifications. Units range from small apartment units to large industrial systems exceeding 120,000 m³/h. Revenue is project-based, one-time per installation.
2. EPD Documentation Services: Third-party verified Environmental Product Declarations generated for each ventilation unit. Project-specific EPDs document environmental impact including CO2 footprint using sustainable materials.
3. Spare Parts: Replacement parts including handles, hinges, rotor controllers, filters, and dampers for maintenance and repair of existing installations.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels6 records

Core offering

NB Ventilation A/S designs, manufactures, and delivers custom-built air handling units (AHUs) and ventilation systems for industrial, commercial, and residential applications. The product range spans indoor (NBI) and outdoor (NBU) units with capacities up to 120,000+ m³/h, incorporating five heat recovery technologies (rotary, double cross-flow, cross-flow, counter-flow, and liquid-coupled), ATEX-certified explosion-proof variants, and integrated automation packages (Danfoss ECL Comfort A315 and OJ Electronics Air2).

Product overview

NB Ventilation A/S (founded 1972, ~40 employees, Aalborg Øst, Denmark) is a custom-build manufacturer of air handling units (AHUs) and ventilation systems serving residential, commercial, and industrial markets. The product portfolio centers on two main unit series — NBI (indoor) and NBU (outdoor) — across three solution tracks: Classic (custom-tailored), OEM (co-development), and LinkNordic (standardized comfort/residential). The product range encompasses five heat recovery technologies: rotary heat exchangers (up to 90% efficiency), double cross-flow exchangers (up to 150,000 m³/h, >85% efficiency), cross-flow exchangers (73–78% efficiency), counterflow exchangers (80–95% efficiency), and liquid-coupled coil systems for remote unit placement. ATEX-certified explosion-proof units address hazardous environments. All units can be equipped with two automation packages: Danfoss ECL Comfort A315 and OJ Electronics Air2 (with Modbus/BACnet support). NB Ventilation recently invested in a project-specific EPD-generator, enabling third-party-verified Environmental Product Declarations for each individual unit configuration. Capacities span from small apartment units to industrial systems exceeding 120,000 m³/h.

Differentiator

Problem solved

Functional benefit

Brands

• LinkNordic: Standardized comfort and residential products under the NB Ventilation umbrella, featuring the largest selection of air handling units with counterflow heat exchangers in Scandinavia.
• Classic
• OEM

Products and services

• NBI Indoor Ventilation Units Custom-built indoor-mounted air handling units designed to customer specifications for air volumes up to 120,000 m³/h, covering the full range of NB Ventilation's heat recovery and air handling technologies for industrial, commercial, and residential buildings.
• NBU Outdoor Ventilation Units Custom-built outdoor-mounted air handling units with weather-resistant casing options including trapezoidal cladding, sharing the same capacity range and heat recovery technology options as the indoor NBI series.
• LinkNordic Standardized Ventilation Units Standardized comfort and residential ventilation products under the LinkNordic sub-brand, featuring the largest selection of air handling units with counterflow heat exchangers in Scandinavia. Units are tested by Teknologisk Institut against Ecodesign regulations (EU 1253/2014).
• EPD-Generator (Environmental Product Declaration Service) Project-specific, third-party-verified Environmental Product Declaration (EPD) generation for each ventilation unit, automatically populated from internal calculation and documentation systems. Documents CO2 footprint using steel with over 90% recycled content made with hydrogen fuel.
• Spare Parts Replacement parts including handles, hinges, rotor controllers, filters, and dampers for maintenance and repair of existing NB Ventilation installations.
• ATEX-Certified Explosion-Proof Ventilation Units ATEX-certified ventilation units for explosive atmospheres (ATEX Zones 0, 1, 2 for gases and Zones 20, 21, 22 for dust). Features include antistatic materials, explosion-proof motors, controlled surface temperatures, and full grounding. Used in chemical, pharmaceutical, food, offshore, and mining industries.

Quantifiable outcome

• Heat recovery efficiency up to 90% with rotary heat exchangers
• +4 more outcomes

Named customers9 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature5 records

Partnerships

Three partnerships are on record, tiered core and minor.

• LinkNordiccoreStrategic or Co-development PartnerLinkNordic was acquired by NB Ventilation as part of the company's strategic development under family Gerhardt ownership since 2003. LinkNordic specializes in standardized comfort and residential products (LinkNordic brand), complementing NB Ventilation's custom solutions.
• Aalborg UniversityminorStrategic or Co-development PartnerCollaborates with Aalborg University for access to latest knowledge and know-how, contributing to the education of Denmark's future talents
• DanvakminorStrategic or Co-development PartnerIndustry network partner; NB Ventilation hosted Danvak theme meeting on tightened building regulations featuring speakers from Rådet for Bæredygtigt Byggeri

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Menerga: German manufacturer of air handling units specializing in heat recovery for commercial, industrial, and laboratory applications. Direct peer to NB Ventilation on technology, target verticals (pharma/labs/healthcare), and the European project-based sales model.
• Dantherm Group: Danish climate-control solutions provider serving industrial, commercial, and defense customers with ventilation, heating, and dehumidification equipment. Comparable to NB Ventilation on Danish origin, defense and industrial customer base, and custom-engineered climate solutions.
• Systemair: Swedish manufacturer of ventilation and indoor climate solutions, including custom and standardized air handling units with heat recovery. Direct competitor to NB Ventilation in the Nordic and broader European AHU market, with a similar mix of custom-engineered and standardized product lines.
• IV Produkt: Swedish manufacturer of energy-efficient air handling units with a strong focus on heat recovery. Closely comparable to NB Ventilation on core AHU product, heat-recovery efficiency positioning, and Scandinavian market presence.
• Exhausto: Danish ventilation manufacturer offering air handling units and ventilation components for residential and commercial buildings. Directly comparable to NB Ventilation on Danish market presence, project sales approach, and AHU product family.
• Bevent Rasch: Swedish manufacturer of ventilation equipment including air handling units and ventilation components. Directly comparable to NB Ventilation on Nordic AHU market overlap, custom-build offerings, and target applications including industrial and commercial buildings.
• Swegon: Swedish indoor-climate solutions provider offering air handling units, heat recovery, and building automation. Comparable to NB Ventilation through its custom AHU portfolio and Nordic customer base across residential, commercial, and industrial segments.

Broad incumbents

• FläktGroup: Major European HVAC manufacturer offering custom and standardized air handling units across commercial, industrial, and mission-critical environments. Comparable to NB Ventilation on custom AHUs and heat recovery, but at significantly larger scale and broader portfolio.
• WOLF: German HVAC manufacturer offering heating, ventilation, and air-conditioning systems for residential and commercial markets. Comparable to NB Ventilation on European HVAC positioning and air-handling technology, but with a broader portfolio and larger geographic reach.
• Lindab: Danish-Swedish building products company with a substantial ventilation business including AHUs and ductwork. Comparable to NB Ventilation on Danish/Nordic market overlap and AHU product, but Lindab operates a much broader portfolio of steel building components.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/nbventilation
• LinkedInlinkedin.com/company/nb-ventilation-a-s

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries1 record

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 NB Ventilation