Carrier Comfort Series Air Handlers
Carrier's economical series. These models are still reliable, efficient, and quiet. They work well with other Comfort air conditioners or heat pumps.
FX4D Air Handler

FX4D = 1.5 - 5 Ton
Multi-Speed
Quiet Operation
FB4C Air Handler

FB4C = 1.5 - 5 Ton
Multi-Speed
Quiet Operation