After feasibility has been proved, a final design will be made which will need to be successfully tested against the MHRA requirements before we can apply for medical device clearance. 

The UK National Physical Laboratory will conduct this testing.

Although this project is open source this design is not permitted for anybody to make themselves as this will not provide sufficient quality control needed for medical product clearance when it gets to that stage, instead we will need to collaborate with manufacturers.

Please take a moment to share our work and consider helping fund our design if you can.

We are a team of volunteers and we are not being paid for the work we
are putting in to this project.

We require funding for building the next set of prototypes for testing against the MHRA requirements

All donations received will go towards; buying parts & materials and production of a small number of test units (unit costs will reduce quickly with higher volumes).


Ventilator capacity is improving in countries that can afford to make non-emergency use ventilators, but these more complex designs take time to scale up, use specialist components and are costly, so these are not a suitable solution for all countries. We are working to address the ventilator shortage in the developing world.  The design is based on a hand pumped ventilator called an ambu-bag (or BVM), these low cost devices are readily available in most countries health care systems and crucially already have medical clearance. 

There are lots of incredible teams out there designing ventilators, and the worldwide ventilator shortage is not going to be solved by one ventilator design. We are working to meet an unmet need and we go by the following values:

Based on an ambu-bag

Existing medical clearance. Low cost. Readily available.

Rapid manufacture

Made from readily available materials and production processes to enable rapid manufacture at low cost.

Can be used anywhere

Not dependent on compressed airline which may not be available in hospitals with less resources (oxygen is separate).


Bag compression can be monitored through transparent panel for feedback.


OpenVent has cut-down simplified functionality tailored to emergency COVID-19 treatment, which means costs are lowered.


Aiming toward FDA EUA collaboration with ISO13485 manufacturer. Originally designed for MHRA RMVS.


Our first open source basic mechanical design concept is published.

Version 2.0 design is tested at National Physical Laboratory

Version 2.0 open source design is published

Build two Version 3.0 prototypes using 3D printed flow sensors

Software written for PCV and adaptive ventilation modes

Testing of the final design at NPL to MHRA requirements

Build 10 prototypes & receive CNC machined prototype flow sensor

Begin 24/7 life test on prototypes, document design and post PR/press articles to gather interest in final design


Darren Lewis

Project Lead

Darren is a Design Manager working in a New Product Concepts team in R&D. With 10 years industry experience developing complex electro-mechanical systems into products. Darren has an extensive multidisciplinary engineering skill set in mechanical, electronic & software engineering.

Ross Goodwin


Ross is an Associate Principle Engineer working in a motor development team. He has over 10 years of experience developing high speed turbo-machinery to meet performance, durability safety and functional requirements. Ross’ engineering skill set includes structural and thermal simulation, design for manufacturer, and experimental testing of complex electro-mechanical systems.

JT Miller

FPGA Engineer

20 years of embedded design experience spanning the Defence, Fintech, and Automotive industry. Specializing implementing DSP in FPGAs for real-time systems.

Donald Robson


Donald is an Embedded Development Engineer at Graphcore, with a varied career encompassing mechanical design, mechatronics and firmware development. During his time at Dyson he influenced a number of flagship products in environmental control, floor-care and lighting.

Shrouk El-Attar

Electronic Engineer

Working at Elvie. Recognised as top 6 young women engineers in the UK, by BBC 100 most influential women of 2018, and United Nations Young Women of the Year 2018.

Kian Ming Yak


Yak is a mechanical engineer with 5 years experience developing and launching products in multiple industries, including audio, AR and IOT.

Cristian Taran

Project Management

Cristian is a software developer with more than 15 years experience in developing software and managing software engineering teams in diverse industries.

Jonas Fehr

Mechatronics & Software

Jonas is a creative coder working mainly in the field of light and media art. He has a broad skillset, ranging from electronics over software to mechanical engineering.

Rick Collins


Rick studied electronics since the age of 15 resulting in an MSEE. Working for a number of companies, his niche developed into board level design and programming FPGA devices.

Abu J.Ahad

Risk Management

A certified risk professional and Fellow of the Institute of Risk Management. 26-yrs in mega-construction programmes across multiple sectors, including real estate, infrastructure, renewable energy, self-driving vehicles, academia and corporate finance.

Dheeraj Menghi

Public Relations

Dheeraj is a student of MBA Marketing. He has six years of experience in Sales and is certified in Google Analytics.

Jayesh Bodkhey

Mechanical Engineer

With 12 years experience in various product design (electromechanical, machine design and Sanitary product design).

Roland Johnson

Electronic Engineer

Roland specialises in the design of safety-critical systems for hardware, software and firmware, primarily for industrial and control applications, and is currently at CERN developing machine interlock systems for the High-Luminosity upgrade project for the LHC.

Pradnya Bogar

Project Management

Pradnya is an aspiring Program manager, who has managed cross-functional teams and released ideas into features and processes in various products and teams while working as a firmware engineer at Qualitrol and Fluke for over 5 years. She has a Master’s in Electrical Engineering and various certifications in Project Management, Process Improvement, and Situational Leadership.

Michael Blake Ferguson

Computer Engineer

Michael is a graduate in Computer & Electrical engineering with 2 years experience working in Software and Systems engineering. He is currently enrolled in a Master of Engineering in EE program and plans on obtaining Professional Engineering licensure. His interests include PCB, VLSI & FPGA design.

Konstantinos Theofanis

Electrical & Computer Engineer

Electrical and Computer Engineer (holder of BSc & MSc equivalent degree). My fields of interests include power electronics, motor drive, embedded systems and battery management systems. Currently working as a Development Engineer – Power Electronics for Drives



Lead consultant anaesthetist, Dr Garcia working in a UK Intensive Care Unit.

Daniel Stemen, Manager of Respiratory Care and Interventional Pulmonary Services, Keck Medical Center, California

Erich Schulz, anaesthetist, Brisbane


2 nurses who are working to treat COVID patients in Intensive Care.


P3 Medical: Manufacturer of ventilation devices –



Darren Lewis

Project Lead

contact information

write us or contact us on our social media


Note: although this project is open source this design is not permitted for anybody to make themselves as this will not provide sufficient quality control needed for medical product clearance, instead we will need to collaborate with manufacturers.

All users of this design and device shall be deemed notified of the warnings stated herein. This device is a simply designed, fast produced ventilator. This device should not be used in place of an existing hospital ventilator. These should only be used as a last resort where a patient has no other alternative due to the lack of availability of existing ventilators. 

This is not a fully medically certified device and should not be relied upon as such. The device is designed for use by trained medical professionals and should only be used by trained medical professionals; it is not intended for home use. 

The designers and manufacturers of this device shall not be held liable for any loss whether direct, indirect or consequential, death or personal injury that may result from the use or manufacture of this device. To the extent it is not possible to exclude such liability, the designers and manufacturers limit their liability to the greatest extent permitted in law. The designers and manufacturers of this device give no guarantees or warranties in relation to the device. In particular, and without limitation to the above, the manufacturers and designers give no warranty as to::

the efficacy of this device; and/or 

safety of this device. 

OpenVent-Bristol is not connected with Dyson in any way or CoVent. This project is worked on by the team in their own time and capacity.