Congress Investigating Pricey Deal With Ventilator Company

The transcript discusses a failed contract between the Department of Health and Human Services and Philips for ventilators, as investigated by Pro Publica. The ventilators were never delivered, leading to a new, more expensive deal. A Congressional subcommittee is investigating the matter, citing Pro Publica's findings. Philips produced commercial versions of the ventilators, selling them overseas at higher prices. Recently, HHS agreed to purchase these commercial ventilators at a significant cost.

What concerns did the Congressional subcommittee address in their letter?

What type of ventilators did Phillips produce instead of the ones for the stockpile?