There is an interior (no windows) conference room that the client wants individual control for via a mini split. In the past we've either provided air off of an adjacent split system to bring in outside air or used a ceiling cassette and ducted outside air to it. Neither option is great. If your split system has ~20% outside air to it, you can't supply enough air to the conference room for the right ratio of outside air without competing with the mini split. The ceiling cassettes have outside air connections, but don't bring in enough outside air for conference room osa requirements either. The client doesn't want the added expense of a small HRV for this room. I'm curious if there is a better option that is being designed/installed by someone for complying with mechanical ventilation requirements.
