I think people who are actually working on ventilators should seriously consider going for a simpler design .. it might be this or might be something else. The person in this article also said he is happy to give the design away.
I think if the Malaria Med+Antibiotics treatment from the French study don't work (we'll know in about a week I think), we need to move to a war footing and start producing ventilators. My back of the envelope math has scared the crap out of me (best case 500K Canadians dead, worse case 3 million).
I really hope someone who can make a difference sees this.