M.U.R – Minimal Universal Respirator (EN)

Website under construction !

Because of the emergency we have prioritized the development of the respirator; this site will evolve in the coming hours and days.


The COVID-19 health crisis that France and the world are going through has become a serious humanitarian crisis. Today, the medical world lacks ventilators to be able to work properly and save as many lives as possible.

Since Monday 16 March, a citizen group composed by doctors, association leaders, humanitarian personnel and scientists has been working on the creation of an emergency artificial respiration device that is cheap and easily reproducible. The manufacturing laboratory « Club Sandwich Studio », at the origin of the collective, has designed a low-cost – lowtech ventilator by promoting the use of components accessible to the greatest number.
Today, after designing different versions following feedbacks from tests made by several resuscitation doctors, our device is ready to be tested. Specialized bench tests are underway and are the first step in the certification process we have undertaken.

To face together this sanitary crisis, we are making available on this site the first prototype version of M.U.R (designed from the equipment we had in our studio/workshop on the day of the containment and the one brought by our partners).

The present version of the ventilator (V0.2) has already been improved following all the contributions made by our partners.

We hope that this call for contributions will enable us to find even better equipment and skills to finalize the optimization of the M.U.R.


This project is a humanistic and disinterested initiative, whose only vocation is to preserve life by offering a response to the lack of materials related to the current crisis.

It is a collective, citizen and participative approach; we share the fruit of our work which is put under free license. It is freely reusable, by everyone, everywhere in the world.


Today we observe :

  • A shortage of medical devices
  • A dysfunction of industrial supply channels
  • A shortage of trained health care workers

We keep in mind to keep M.U.R easy to use, efficient and intuitive.

This is why our specifications are as follows :

  • Few expensive components, few parts
  • Easily reproductible
  • Rapidly deployable
  • Didactic and user friendly

Our system is designed to be connected to any sufficiently powerful air source and to regulate it precisely, in order to provide respiratory assistance (invasive or not) to people who need it, without any risk for the patient.


  • The top priority objective is to finalize the bench tests in real conditions. In this way, we will be able to validate the correct response of the device to the technical and medical constraints imposed by the certification standards.
  • In parallel, we continue to test our device, several at the same time, during several days. It is essential for us to know the durability of the designed systems (valves, connectors…) and technical parts (actuators, electronics…).
  • At the same time, we are always improving the design (quality, simplicity, durability and availability) thanks, among other things, to the contributions of our technical partners.
  • To pass and validate the certifications allowing to diffuse the ventilator
  • To finish this race against time, the logistics chain of production, assembly and delivery to hospitals will have to be maintained.

Here, a link to our settings demo video : MUR DEMO VIDEO (twitch)

The physical settings available on MUR are :

  • Number of cycles per min (respiration rate)
  • Inhalation / exhalation ratio
  • Peak pressure (in cm H2O)
  • Plateau pressure (in cm H2O)
  • Expiratory pressure (in cm H2O)

MUR is composed of :

  • (3x) 3D printed valves (2 closed-loop and one manual)
  • (2x) actuators (simple standard actuators)
  • (1x) barometric sensor (pressure)
  • (1x) differential pressure sensor
  • (1x) physical control box (with 5 potentiometers)
  • (1x) alarm and safety system to monitor patient status (peak pressure alarm and plateau alarm) and expiratory pressure (in cm H2O)
  • (1x) electronic board to control the whole (any type of Arduino)
  • (1x) activated carbon air filtration system

Completed with :

  • a 5V stabilized power supply
  • a blower

Documents used for design :

WARNING This equipment is currently a prototype IN VALIDATION !

At this stage, do not use it for medical use, and do not start reproducing ! Any exploitation of these documents is the responsibility of the user!



By offering us technical optimizations (quality, simplicity, durability and availability) on the device.

As soon as the device has been validated, we will move on to the mass production phase :

  • Manufacture of parts by 3D printing
  • Sourcing of electronic elements: Arduino, buttons and potentiometers, various cables, power supply.
  • Sourcing of pressure sensors
  • Servo motor sourcing

Help will also be needed to organize assembly and tests to diverse assembly sites :

  • Recovery of manufactured parts
  • Recovery of sourced parts (electronics, miscellaneous components)
  • Assembly of the whole set
  • Quality testing

Delivery to hospitals in need of ventilators will then take place.

You can offer help on any of the points listed above (manufacturing, sourcing, logistics, assembly, testing, delivery, other)?

Please fill in the form with the button below :


At the origin of the M.U.R. project are : Paul Couderc, Arthur Siau, Simon Juif and Antoine Berr, 4 associate designers whose fields of expertise are engineering, electronics, embedded software and industrial development. They are based in Paris in a manufacturing laboratory.

M.U.R. project benefits from the support of ACTED (a French international solidarity NGO recognized as being in the general interest and founder of the Alliance Mondiale 3Zero), Objectif Sciences International (a citizen science NGO) and L’Hermitage (a third place dedicated to marginal and disruptive innovation), all of which are committed to sustainable development objectives and the common good. 

As a response to the urgency and the need for quality production in a process of rupture, this collective has grown in trans-displinarity. It is composed of doctors, engineers, designers, developers, coordinators, managers, communicators, lawyers and financiers from a variety of professional backgrounds (military, entrepreneurs, self-employed, employees, etc.).


Antoine Berr, Paul Couderc, Bruno De San NicolasMarie DenizetSimon JuifJean KarinthiGuillaume LargeauThibault LaroseSébastien RavutDonat Robaux, Julie Rode, Stéphane Rode, Arthur Siau, Margot Smirdec, Solène TouzeauStéphanie Vincent, « jeux.sais.faire »

We would like to thanks for their help :

Amélie BanzetDocteur Henri BobyAlexandre Bulté (Etalab), Yohan BonifaceMathilde BrasChristian Chabrerie (EPITA), Professeur Jean-Michel Constantin (APHP), Gatien Delerue (EPITA), Dominique Delerue, Jérôme DesboeufsJean-Pierre GleyzesBenjamin JeanDocteur Maud KarinthiJonathan KellerCédric Leroy (Gandi), Cécile Monteil (APHP), Pierre Musseau (Mairie de Paris), Gaël Musquet (HAND), Marion Paclot, Odile Quest (infirmière/nurse), Christian QuestHenri VerdierCNESLöwenstein Medical FranceRéseau Français des FablabsRenaultRS ComponentsSculpteo