Logo for AirEx Technologies

Meet an Unreasonable Venture

AirEx Technologies

Bridging the analog and digital divide for smart ventilation control

Photo of Agnes Czako

Agnes Czako

Cofounder & CEO at AirEx Technologies

More about Agnes »
Employees 6–20
Headquarters London, England, United Kingdom
AirEx provides extremely low-cost solutions for reducing fabric heat loss, improving thermal comfort and protecting residents’ health by passive airflow control. Tens of millions of homes across Europe were built with low energy standards. Residents struggle with cold, uncomfortable draughts and high energy bills. However, the complete lack of airflow can cause damp or condensation problems. Traditional air bricks have uncontrolled airflow which allows houses to lose significant fabric heat loss - Airex replaces these with a smart alternative. The system measures the environmental conditions (such as temperature, humidity, air quality) and its cloud-based algorithms automatically regulate airflow, leading to 12-16% reduction in heat loss, resulting in 2-3 years payback. Social Landlords can access Airex free of charge (i.e. fully subsidised), thanks to its eligibility under govt schemes (£2bn/yr).

Notable Achievements

  • Over £4.5M private equity raised and £900k grant funding secured
  • 5,500 units sold commercially. Successfully recognised under the EPC (Energy Performance Certificate) that triggers £2bn/yr funding
  • Won numerous industry awards, including Business Green Technology Award, Tech Nation's Net Zero, RAEng SME Leaders, Women in Innovation

Currently Operating in One Region

Press Mentions

July 19, 2021

How to cool your home in a warming world

Read on BBC News »

June 18, 2021

AirEx is backed by Barclays to accelerate decarbonisation of existing UK housing stock

Read on AirEx »

Work at AirEx Technologies

Posted December 7, 2022

Chief Commercial Officer

London, UK

View Listing »

More Ventures in Energy & Environment

Get the Unreasonable Newsletter

Get twice-monthly updates on AirEx Technologies and over 350 other ventures working to solve the world's toughest problems.

Read our Privacy Policy.

Unreasonable Impact: Food Solutions — a new podcast on food sustainability hosted by Christiana Musk. Discover the latest in agriculture technology, alternative proteins, and food waste reduction solutions that tackle hunger.
Listen now »