Usually, Yes

Most central air-handling units can be retrofitted. A plate core often slots into the AHU section with minimal ductwork changes; a rotary wheel needs space for the wheel and its drive.

What to Check First

• Physical space in or beside the AHU
• Balanced supply and exhaust airflow
• Available fan capacity for the extra pressure drop
• Controls to manage frost protection if needed

Retrofit Tips

Start with a crossflow plate core for simplicity. Verify the fan can handle the added static pressure before committing, and model the savings at your actual operating hours.

Payback

Retrofits in continuously ventilated buildings often pay back within a few seasons because the duty runs year round.