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Breathing Buildings - Natural & Low Energy Ventilation

Natural Ventilation - Passive Ventilation - Low Energy e-stack Mixing Ventilation

Breathing Buildings is the UK’s leading low energy natural ventilation company – home of the E-Stack® mixing ventilation system that is changing the world of natural ventilation.

When we started the company back in 2006, there was a choice between cold draughts and wasteful pre-heating of air. Our patented E-Stack® mixing ventilation products and strategy, allied to smart controls and superb engineering, has changed that forever.

The benefits of mixing ventilation are now so clear that it is written into regulations, such as the Priority Schools Building Programme and the replacement document to BB101 Guidelines on Ventilation, Thermal Comfort and Indoor Air Quality in Schools, both stating that for naturally ventilated teaching spaces, fresh air must be pre-mixed in winter, a testimony to the evidence we can show you.

Mixing Ventilation

The Breathing Buildings philosophy of natural ventilation stems from pioneering research at Cambridge University and the ground-breaking E-Stack® natural ventilation system. The research at Cambridge identified a paradox with ventilation – many naturally ventilated buildings were found to use more energy than mechanically ventilated ones! This was solved by developing a new approach to natural ventilation which is now completely changing the industry.

Before E-Stack®

The traditional method of naturally ventilating a building was to bring air in at one location and to exhaust it from another. In winter, the problem of cold draughts was overcome by pre-heating the air with a radiator or other such device.

However, in modern well insulated buildings, if the cold fresh air has been pre-heated to 16ºC by a radiator, then the space becomes incredibly hot if the ventilation rate is limited to the minimum required in terms of CO2 levels. This results in spaces being over-ventilated and therefore the radiators emitting more heat to pre-heat higher quantities of cold air.

Winter Mixing

This conundrum was solved by treating the heat gains in the space as a benefit rather than a problem. A new method of naturally ventilating a building in winter was devised and patented which requires the incoming cold fresh air to be mixed with warm room air before it reaches occupants.

With this winter mixing natural ventilation strategy, the heat gains in the space are used to effectively pre-heat the air and the heating bills for naturally ventilated buildings can be reduced dramatically; by 50% over the whole year.

What We Do for Our Clients

We aim to help clients create the lowest energy building possible with minimum associated CO2 emissions and capital cost, whilst providing appropriate levels of ventilation and thermal comfort throughout the year. We do this through our range of innovative ventilation products and through our unique design consulting.

We also offer a turnkey solution for our clients including:

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  • Design support throughout the project
  • Early stage advice on window free areas & shaft sizes
  • Dynamic thermal modelling
  • In-room user interface
  • Ongoing monitoring
  • BMS integration
  • Installation
  • We will work with you from start to finish ensuring a successful project

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Request Breathing Buildings Info

 Breathing Buildings Product Range mixed ventilation e-stack

Breathing Buildings Ltd
The Courtyard
15 Sturton Street
Cambridge
Cambs
CB1 2SN

Email Breathing Buildings

Tel: 01223 450 060
Fax: 01223 450 061

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