HVAC question

Good morning all- We live in a 100yr old coop on a high floor. We installed central AC when we moved in around 10yrs ago and need to have it updated as one compressor seems undersized for the summer heat now. When i do that i would like to explore fresh air intake options. In the winter, our apartment is uncomfortably hot since we’re on a high floor and can’t control the heating system (yes we... [more]

Good morning all- We live in a 100yr old coop on a high floor. We installed central AC when we moved in around 10yrs ago and need to have it updated as one compressor seems undersized for the summer heat now. When i do that i would like to explore fresh air intake options. In the winter, our apartment is uncomfortably hot since we’re on a high floor and can’t control the heating system (yes we turn our radiators off). When we open the windows in the winter, given the layout of our apartment, we dont always get good airlfow so regulating the air flow and temperature in different rooms is very difficult. Does anyone know if it s possible to integrate exterior air ventilation with a traditional AC system? Ie a combination AC / fresh air fan intake system that could be run as a traditional ac in the summer (use indoor air, cool it and send the hot air out) and fresh air fan in the winter (ie bring cold outdoor air in)? Thanks! [less]