If your new window unit does not have a condensation drain, it's important to understand how it handles condensation and whether or not it requires a drain. Most window air conditioning units are designed to handle condensation internally, without the need for a separate drain.
Window units typically use the condensation created during the cooling process to help cool the outdoor components of the unit, such as the condenser coils. This is often referred to as "self-evaporating" or "self-draining" functionality. The condensation is evaporated and expelled along with the warm air through the exhaust hose or vent.
If your window unit does not have a visible condensation drain or a separate drain hose, it likely relies on the self-evaporating method. In this case, you shouldn't be concerned about the absence of a drain. However, it's always a good idea to consult the manufacturer's instructions or user manual for specific information about your unit's condensation management system.
If you're experiencing excessive condensation buildup or any other issues related to moisture, it's advisable to contact the manufacturer or seek professional assistance to ensure proper functioning and prevent any potential damage.