[ahaucnx]

The system that I am having in place now is connected to our indoor air quality monitor and constantly regulates the fan speed of the PPS. By measuring the CO2 levels in the room, I can also detect when the room is actually occupied. This works extremely efficient and by playing around with the parameters can be optimized for cleaner air vs energy efficiency (or both).

So in a way it does exactly what you say and finds the ideal equilibrium to keep just the right amount of pressure needed.

[hedora]

Air to air heat exchangers will help a lot with energy loss.

Now that we have a CO2 meter, I am strongly considering wiring it to an air exchanger and having a PID controller just keep the house co2 below 600-800 ppm, and the pm 2.5 below 10 ug/m3.