The AVC Air Handler line offers the ultimate in comfort, sound and application flexibility. This unit may be used for upflow, downflow, horizontal right, or horizontal left applications. No special kits are required to install this premium product. All residential air handlers and coils may use a TXV to provide our customers with the optimum performance and refrigerant control. Air handlers maybe shipped with “Flex-coils” without a factory installed metering device or factory installed TXV. For added flexibility, an R-22 or R-410A TXV or orifice can be field installed to meet your refrigerant choice.