Good questions. We have a way of running HEPA with not unreasonable pressure loss, and then dialing back the amount of filtration when PM2.5 levels are reason

Good questions. We have a way of running HEPA with not unreasonable pressure loss, and then dialing back the amount of filtration when PM2.5 levels are reasonable. Separately a homeowner can request a high filtration mode. Humidifying is though a system similar to a whole home humidifier - a small bypass from the supply side of the furnace evaporates water off a media. Yes, through a combination of reheat and coil temperature control we can change the sensible/latent cooling ratio. HRV/ERV only makes sense in certain applications. We're looking at making one integral in the system, but it will come down to minimizing total cost for homeowners. Comfort metrics will be unaffected.