What Passivent does

Passivent is a UK-based manufacturer of natural and hybrid ventilation systems, founded in 1983 and headquartered in Hadlow with production at its Pinxton, Nottingham facility. Its product portfolio comprises roof-mounted ventilation terminals (Airscoop, Airstract, Hybrid Plus Airstract, Airstract iAT, Aluminium Airstract), wall and window ventilators (Aircool in standard, thermal, acoustic and hybrid variants), the patented SoundScoop acoustic cross-talk attenuator, the Litevent rooflight/ventilator combining natural daylight with ventilation, intelligent multi-zone control systems (iC8000 and the newly launched iC9000 with BACnet), and the iMEV mechanical extract system for care homes. All products are manufactured in-house, enabling bespoke sizing and RAL/BS colour matching for client specifications.

The company sells primarily to UK construction projects through a direct specification-led model, working with architects, consultants, and contractors at design stage. Pricing is project-based (no public price list), with revenue streams combining hardware sales and professional services including IES thermal modelling, CPD seminars, NBS specifications, BIM objects, and commissioning. The customer base is anchored in education (the primary sector, evidenced by projects for Greatfields Primary, Gateway to the Valleys School (first BREEAM Outstanding high school), City & Islington College, and Sunderland's Sunningdale SEND school), commercial, leisure, residential care, and healthcare; named enterprise customers include Tesco (eco-store), Sky (BSkyB), and the SSE Hydro (now OVO Hydro) arena.

Since 2019, Passivent has operated as a trading brand of Wienerberger Ltd. via the Building Product Design group, alongside Glidevale Protect and Kingfisher Louvres. Certification posture is strong: ISO 9001, ISO 14001, ISO 45001, and BES 6001 (Excellent rating, 2024). The brand is differentiated by patented acoustic and rain-rejection technologies, a 15 Year No Leak Guarantee on selected terminals, and embedded positioning in UK schools' Building Bulletin frameworks.

Name

Passivent

Legal name

Passivent (trading brand of Wienerberger Ltd.)

Website

https://passivent.com

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

251–500 employees

Short description

Passivent is a UK manufacturer of natural and hybrid ventilation, acoustic, and daylight products, selling direct to education, commercial, leisure, and care sector construction projects through specification-led channels and in-house technical support.

Ownership category

akta.pro rank

Product category

Building Ventilation Products

NAICS

Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341)

SIC

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

akta.pro primary industry

Ventilation, Ducting & Air Distribution Equipment (IMAHAKAG)

akta.pro secondary industries

Fans, Blowers & Ventilation Units (Supply/Exhaust/Inline) (IMADANAB), Heat Exchangers, Coils & Hydronic HVAC Components (IMADANAF), Louvers, Vents & Architectural Grilles (IMADAIAM)

Keywords

• Natural ventilation products
• Hybrid ventilation systems
• Roof ventilation terminals
• Acoustic air transfer
• Intelligent building controls

Headquarters

HQ city

Hadlow

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Sales - Ventilation Products: Sale of natural and hybrid ventilation products including roof terminals, wall/window ventilators, acoustic attenuators, and control systems. Products are manufactured in-house allowing for bespoke solutions to meet client design specifications.
2. Technical Support Services: Commissioning, design support, IES thermal modelling, bulk airflow calculations, and CPD seminars provided to support product specification and installation.
3. Specification Services: NBS specifications, BIM objects, specification documents and clauses provided to architects and consultants for building specification.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Passivent designs, manufactures, and supplies natural and hybrid ventilation products (roof terminals, wall/window ventilators), acoustic cross-talk attenuators, intelligent and stand-alone control systems, and mechanical extract ventilation solutions for buildings. All products are manufactured in-house at a Nottinghamshire facility and can be linked to proprietary control systems or integrated with Building Management Systems. The offering is targeted at architects, consultants, contractors, and end-customers in education, commercial, leisure, residential care, and healthcare sectors.

Product overview

Passivent is a manufacturer of natural ventilation, hybrid ventilation, and natural daylight solutions with over 40 years of experience. The product portfolio consists of roof ventilation terminals (Airscoop, Airstract, Hybrid Plus Airstract, Airstract iAT, Aluminium Airstract, Litevent Airstract rooflight), window and wall ventilators (Aircool, Hybrid Plus2 Aircool, Thermal Aircool, Acoustic Aircool, Thermal Hybrid Aircool), the SoundScoop acoustic cross-talk attenuator, and comprehensive control systems (iC9000, iC8000 intelligent controllers, eC100/eC200/eC300 stand-alone controllers, CO2 indicators). Products operate as standalone systems or can be integrated with Building Management Systems via BACnet. The company also offers moisture removal solutions including the iMEV intelligent mechanical extract system. All products are manufactured in-house in Nottinghamshire, UK, enabling bespoke solutions for client design specifications.

Differentiator

Problem solved

Functional benefit

Products and services

• Airstract Roof Ventilation Terminal Roof-mounted natural ventilation terminal combining low airflow resistance with high airflow capacity and weatherability. Features patented double bank louvres providing Class A 100% rain rejection, motorised base dampers, and 15 Year No Leak Guarantee. For buildings across education, commercial, and leisure sectors.
• Hybrid Plus Airstract Roof Ventilation Terminal Hybrid version of the Airstract offering three modes of ventilation provision or extraction depending on building needs and outside conditions, combining natural and mechanical ventilation in one unit.
• Airstract iAT Roof Ventilation Terminal Airstract variant with intelligent airflow technology for still, windless days and unusual events such as high occupancy or unusual heat gains. The intelligent control system activates a lower energy fan to maintain ventilation performance.
• Aluminium Airstract Roof Ventilation Terminal Aluminium version of Airstract available in larger sizes than the standard model, providing greater airflow performance. Features extruded aluminium louvres with mitred corners, powder coated finish, and removable welded aluminium lid.
• Airscoop Roof Ventilation Terminal Roof mounted ventilation terminal with wind-driven ventilation capability. Features diagonally divided chambers that channel wind into the building and displace warm air through leeward chambers. Available with 15 Year No Leak Guarantee. Patented segmented design with Class A rain rejection.
• Litevent Airstract Rooflight/Ventilator Controllable ventilator combined with a rooflight for flat or low-pitched roofs. Combines natural ventilation and natural daylighting functions in one unit, reducing need for artificial lighting.
• Aircool Ventilator Window and wall ventilator for fresh air supply. Features thermally broken frame, low voltage motorised dampers, excellent airtightness when closed, and external weather louvre protection. Available in standard, thermal, acoustic, and hybrid variants.
• Hybrid Plus2 Aircool Ventilator Hybrid ventilator with air tempering and mixing unit using a single energy-efficient fan. Operates in three modes: passive, mixing, and boost, providing natural and hybrid ventilation for facades.
• Thermal Aircool Ventilator Window or wall ventilator designed to supply tempered fresh air during cooler weather. Incorporates low resistance airflow heater coil connecting to the building's central heating system. U-value as low as 0.86W/m2K.
• Acoustic Aircool Ventilator Aircool ventilator with acoustic treatment for noise attenuation. Designed for environments requiring both ventilation and acoustic performance, such as buildings adjacent to busy roads.
• Thermal Hybrid Aircool Ventilator

Quantifiable outcome

• Airscoop roof terminals can ventilate buildings with only 3 units where 4 were originally proposed, demonstrated through IES thermal modelling
• +4 more outcomes

Named customers9 records

Segments7 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature9 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Integrated Environmental Solutions (IES)coreTechnology or IntegrationTechnology partnership providing integration of Passivent products within IES Virtual Environment (VE) software. Products are available for modelling within IES VE with dedicated Navigator tools for stepped design processes including thermal simulation and compliance analysis. Passivent's full range of roof ventilation terminals was included in the launch of IES Virtual Environment in 2025.
• Glidevale ProtectcoreStrategic or Co-development PartnerSister company under Building Product Design providing specialist ventilation solutions, condensation control and energy efficiency across the built environment. Companies exhibit together at trade events such as ArchiExpo Dublin. Glidevale Protect supplies products like TF200 breath membranes on Passivent projects.
• Kingfisher LouvresminorStrategic or Co-development PartnerSister company under Building Product Design, manufacturer of aluminium louvre systems. Both are trading brands of Wienerberger Ltd.
• Wienerberger LtdcoreStrategic or Co-development PartnerParent company of Building Product Design, which owns Passivent as a trading brand. Wienerberger is the world's largest producer of bricks and Europe's largest clay roof tile producer. Passivent's careers page links to Wienerberger's recruitment system.
• Building Product DesigncoreStrategic or Co-development PartnerParent/subsidiary relationship. Building Product Design acquired Passivent (with other brands Glidevale Protect and Kingfisher Louvres). Building Product Design Ltd generated revenues of £31.96m in 2023 and operates 3 factories and offices.

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Market position

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/passivent

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Passivent