Rensair
Rensair is a London-based commercial air purification company that combines H13 HEPA filtration with UVC sterilization and an IoT-enabled Smart Demand Controlled Ventilation platform to serve offices, universities, hospitals, transport providers, and senior living facilities across 40+ countries.
- Company typePrivate
- Founded2021
- HeadquartersLondon, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Rensair does
Rensair is a London-headquartered commercial air purification company that designs and manufactures hospital-grade air purifiers combining H13 HEPA filtration with UVC light sterilization, complemented by the Rensair Cloud IoT platform and the globally patented Smart Demand Controlled Ventilation (SDCV) system. The company's product portfolio includes the Core i and Core commercial units, the Compact portable WiFi-enabled purifier, and the AirBubbl in-vehicle purifier, supported by recurring revenue from replacement filter kits and a Cloud subscription. Underlying technology originated with Danish ventilation engineer Henrik Hendriksen around 2003 and was developed in collaboration with Scandinavian hospitals over a 20-year period before being formalized into the Respired Group/Rensair entity in 2021.
The company operates a sales-led go-to-market with enterprise field sales for large commercial buildings and healthcare facilities, and inside sales for mid-market offices, universities, and smaller healthcare sites. Pricing is quote-based with multi-year enterprise contracts, and heavily discounted offerings are available for charitable and non-profit organizations. Rensair sells across four primary verticals — offices and corporate real estate, universities and education, hospitals and healthcare, and transport — with growing exposure to senior living and hospitality. The company holds independent certifications (CARB, cETLus, UKCA, CE, EPA, Greenly, Belgian Ministry of Health) and reports validation from more than ten scientific institutions including Institut Pasteur and the Danish Technological Institute.
Rensair is a privately held company owned and operated by the Hendriksen family (Christian Hendriksen serves as co-founder and CEO, with co-founder Edward Ballsdon as Managing Director), with Henrik Hendriksen credited as the original inventor. The company has raised $7 million in Series A financing from Hoxton Ventures (lead) and Alumni Ventures in May 2022, used in part to acquire AirLabs' air filtration business. Rensair reports operations in 40+ countries across five continents with stocking locations in the UK, Belgium, and the US. Named enterprise customers include GSK, PepsiCo, Anglo American, Walt Disney, General Dynamics, TUI, OCS, Welltower, Vortex, and Sonida.
Rensair firmographics
Firmographics- Name
- Rensair
- Legal name
- Respired Limited
- Website
- https://rensair.com
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Rensair is a London-based commercial air purification company that combines H13 HEPA filtration with UVC sterilization and an IoT-enabled Smart Demand Controlled Ventilation platform to serve offices, universities, hospitals, transport providers, and senior living facilities across 40+ countries.
- Ownership category
- akta.pro rank
Rensair industry classification
Industry- Product category
- Commercial Air Purification Systems
- NAICS
- Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)
- SIC
- Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)
- akta.pro primary industry
- Air Quality & Filtration Equipment (IAQ) (IMAHAKAI)
- akta.pro secondary industries
- HVAC Air Filtration & Air Purifier Installation (HSAOAIAC), Air Quality & Environmental Infection Control (HEPA Filtration, Isolation Barriers, CSSD/HVAC Solutions) (HLAHANAK)
Keywords
Where Rensair is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Rensair business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Marketing or Sales, Personnel, Technology or R&D, Infrastructure
Revenue model
- Hardware Sales: Sale of air purification units including Core, Core i, Compact, and AirBubbl products. One-time hardware purchase with replacement filter kits as consumables.
- Subscription Services: Rensair Cloud subscription for IoT connectivity, monitoring, and smart building integration. Ongoing software services for connected air quality management.
- Replacement Kits and Consumables: HEPA filter and UVC lamp replacement kits sold as consumables. Filters require replacement after ~9,000 hours of operation (~1 year).
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | Enterprise Commercial Solutions |
| Unit Pricing | Pay-as-you-go | Replacement Filter Kits |
| Other | Multi-year contract | Charitable Organization Discount |
Go-to-market motion3 records
Distribution channels3 records
Marketing channels8 records
Rensair product offering
Product offeringCore offering
Rensair designs, manufactures, and sells commercial air purification hardware combining H13 HEPA filters with UVC light sterilization, including the Core, Core i, Compact, and AirBubbl units. These are complemented by the Rensair Cloud IoT platform and the patented Smart Demand Controlled Ventilation (SDCV) ecosystem, which monitors indoor air quality and integrates with building management systems to cut HVAC energy consumption. The company also sells replacement filter and UVC lamp kits as recurring consumables.
Product overview
Rensair offers a portfolio of commercial air purification products built around H13 HEPA filtration combined with UVC light technology. The Core i and Core serve as hospital-grade air purifiers for commercial spaces, while the Compact provides a WiFi-connected portable option. The AirBubbl addresses in-vehicle air purification needs. These products are managed through the Rensair Cloud IoT platform, which is part of the Smart Demand Controlled Ventilation (SDCV) ecosystem designed to optimize HVAC energy efficiency while maintaining indoor air quality. Replacement kits for filters and UVC lamps are available as consumable accessories.
Differentiator
Problem solved
Functional benefit
Products and services
- Core i Hospital-grade portable air purifier designed for a wide range of shared spaces including hospitals, nursing homes, offices, and hospitality venues. Uses H13 HEPA filtration combined with UVC light technology.
- Core Smart air purifier using H13 HEPA filtration and UVC light to capture and destroy 99.97% of airborne pollutants including viruses, bacteria, pollen, and dust. Designed for commercial spaces.
- Compact Portable air purifier with WiFi connectivity and smart app management. Capable of cleaning up to 460 m³/h or 270 CFM of air using HEPA H13 and UVC light technology. Features 360-degree air intake and outflow for flexible placement.
- AirBubbl In-vehicle air purifier designed exclusively for car and transport use. Delivers 38 m³/h / 22 CFM of clean air using HEPA and VOC filtration. Removes 99%+ of particles and noxious gases including VOCs, nitrogen dioxide, and ozone.
- Rensair Cloud IoT-based indoor air quality management platform that monitors IAQ data including CO2, particulate matter, temperature, and humidity. Part of the SDCV (Smart Demand Controlled Ventilation) ecosystem for optimizing HVAC energy efficiency. Sold as a subscription service.
- Replacement Kits Replacement filter and lamp kits including HEPA filters and UVC lamps for Core, Compact, and AirBubbl units. Also includes new VOC filters that combine H13 HEPA with chemically engineered gas-trapping filters. Sold as pay-as-you-go consumables.
Quantifiable outcome
- Reduce HVAC energy costs by >40% while maintaining excellent Indoor Air Quality
- +5 more outcomes
Companies that use Rensair
Customer profileNamed customers14 records
Segments6 records
Ideal customer profiles5 records
Rensair technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Rensair partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered minor.
- FlexportminorCarbon offset program via Flexport logistics partners. Rensair contributes $6.50 per tonne of carbon emitted to Carbonfund.org to fully offset carbon footprint, funding Amazon rainforest protection projects.
- EutracominorDistribution partner in Antwerp, Belgium. Eutraco's facility is the first carbon and energy neutral warehouse by a 3PL logistics solutions provider, recognized with TransportMedia logistics building of the year award 2021.
- University of CopenhagenminorResearch collaboration with University of Copenhagen on indoor air quality research, pollution sources, health impacts and mitigation techniques.
- DTU (Technical University of Denmark)minorResearch collaboration with DTU on indoor air quality research, pollution sources, health impacts and mitigation techniques.
- University of SurreyminorResearch collaboration with University of Surrey on indoor air quality research, pollution sources, health impacts and mitigation techniques.
- KTH Royal Institute of TechnologyminorResearch collaboration with KTH on indoor air quality research, pollution sources, health impacts and mitigation techniques.
- Aarhus UniversityminorResearch collaboration with Aarhus University on indoor air quality research, pollution sources, health impacts and mitigation techniques.
Scale indicators8 records
Recent moves8 records
Expansion highlights6 records
Rensair competitors and assessment
Company assessmentEmerging players
- Molekule: Air purifier company using proprietary PECO (photoelectrochemical oxidation) technology, with growing commercial and consumer presence. Adjacent technology approach but same target market of health-conscious commercial and residential customers.
Direct peers
- IQAir: Swiss-based manufacturer of commercial and medical-grade HEPA air purifiers serving hospitals, schools, and offices globally. Direct competitor to Rensair's Core and Core i products with overlapping target customers in healthcare and commercial real estate.
- Blueair: Commercial and residential HEPA air purifier brand (owned by Unilever) with strong presence in offices, schools, and hospitality. Closely comparable product portfolio and B2B sales motion to Rensair.
- CAMFIL: Global air filtration manufacturer supplying HEPA filters, air purifiers, and cleanroom solutions for hospitals, life sciences, and commercial buildings. Direct competitor in commercial air filtration with broader industrial filter portfolio.
- AtmosAir Solutions: US-based provider of commercial indoor air quality solutions including bipolar ionization and air purification for offices, healthcare, and senior living. Competes with Rensair in the commercial IAQ retrofit market.
- Alen Corporation: US manufacturer of HEPA air purifiers targeting residential, commercial, and healthcare customers. Comparable direct-to-consumer and B2B commercial channel approach to Rensair.
- Austin Air Systems: US-based manufacturer of medical-grade HEPA air purifiers used in hospitals, schools, and homes. Comparable hospital-heritage positioning and HEPA-focused product line to Rensair.
Broad incumbents
- Dyson: Global consumer electronics and appliance company with a HEPA-based air purifier line (Purifier Cool/Formaldehyde). Predominantly consumer-focused but increasingly penetrating commercial real estate and hospitality, where it overlaps with Rensair's market.
- Philips (Signify): Signify-owned Philips Air line offers connected air purifiers and quality monitoring for consumer and small commercial use. Broad incumbent competing at the lower end of Rensair's addressable market.
- Honeywell International: Industrial conglomerate with a broad Building Technologies portfolio including commercial air quality, filtration, and HVAC controls. Competes with Rensair through bundled building automation and larger sales coverage.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Rensair social profiles
Digital presenceRensair compliance and trust
Trust signalCompliance5 records
Rensair financial estimates
Financial estimateRevenue estimate
Valuation estimate
Rensair leadership team
Management profileNumber of profiles
Profiles5 records
Rensair funding detail
Funding detailFunding overview
Funding rounds4 records
Investors4 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Rensair M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Rensair
What does Rensair do?
Rensair designs, manufactures, and sells commercial air purification hardware combining H13 HEPA filters with UVC light sterilization, including the Core, Core i, Compact, and AirBubbl units. These are complemented by the Rensair Cloud IoT platform and the patented Smart Demand Controlled Ventilation (SDCV) ecosystem, which monitors indoor air quality and integrates with building management systems to cut HVAC energy consumption. The company also sells replacement filter and UVC lamp kits as recurring consumables.
Is Rensair a public or private company?
Rensair is a private company. It is classified as family owned and is currently operating.
When was Rensair founded?
Rensair was founded in 2021. It employs 11 to 50 people.
Where is Rensair based?
Rensair is headquartered in London, United Kingdom, in the Europe region.
How does Rensair make money?
Three revenue lines are on record. Hardware Sales are the primary driver. The others are subscription Services and replacement Kits and Consumables.
Who are Rensair's main competitors?
Molekule is listed as an emerging player. Direct peers are IQAir, Blueair, CAMFIL, AtmosAir Solutions, Alen Corporation and Austin Air Systems. Broad incumbents are Dyson, Philips (Signify) and Honeywell International.
Does Rensair have an API?
No public API is recorded for Rensair.
What industry is Rensair in?
Rensair's product category is Commercial Air Purification Systems. Its primary akta.pro industry code is IMAHAKAI, Air Quality & Filtration Equipment (IAQ), with a secondary code of HSAOAIAC, HVAC Air Filtration & Air Purifier Installation. Its NAICS code is 333413 and its SIC code is 3564.