Envinity has finished installing the ductwork throughout the homes! All of the ductwork in each home is for the Energy Recovery Ventilator (ERV); since the homes are designed to be so tight, mechanical ventilation is required to bring in fresh outdoor air into the home. The ERV does this in a way that transfers the temperature of the stale, outgoing air to the fresh incoming air. This means that the homeowners get fresh air without having to use additional energy to heat or cool that air. Whatever additional heating or cooling that is required in the homes is done by a series of Air-Source Heat Pump Mini-Splits. There will be four ductless Mini-Split supplies throughout the home (one on the first floor and one in each bedroom) to efficiently heat and cool the home throughout the year.