Builders always wanted to sell indoor air quality (IAQ) systems, but in the past, adding a humidifier, dehumidifier, and ventilator to an HVAC system meant the installer had to hang four devices and run more than a dozen wires through the walls. Nowadays Honeywell's VisionPro IAQ lets builders hang all the additional IAQ gear near the HVAC system and run the wires to an equipment interface module that sits nearby.
