There are plenty of commercial air purifiers that will at least trap SARS-CoV-2 particles, and they can be added to air conditioning systems.
The IQAir HealthPro Plus, which can be bought for $899[1], filters particles as small as 0.003 microns (Coronavirus is approximately 0.1 microns[2]). And their Perfect 16 product is designed for HVAC systems[3].