The typical solution is to use a heat recovery ventilator (HRV) or a energy recover ventilator (ERV). They exhaust old air outside and bring fresh air in, but t

The typical solution is to use a heat recovery ventilator (HRV) or a energy recover ventilator (ERV). They exhaust old air outside and bring fresh air in, but they also attempt to transfer the heat of the outgoing air to the incoming air.