Here’s a conundrum when it comes to cooling down a house during the summer: a house that’s closed up tightly will enjoy much better air conditioning and energy efficiency, but it will also suffer from poor indoor air quality because no fresh currents blow through from the outside. Opening the window to bring in fresh air also means letting the heat in. So you either have to settle for having cool air or fresh air.
Except you don’t have to choose one or the other! You can have both thanks to a device called the energy recovery ventilator (ERV) installed into the HVAC system. An ERV is beneficial for both summer and winter weather, but in this pose we’re going to focus on the most immediate benefit, which is helping with our extremely high summer temperatures.