Abstract: A heating, ventilation, and air conditioning (HVAC) system may include a heat exchanger to condition an air flow, and conditioning the air flow may generate condensate. The HVAC system may also include a drain pan that collects the condensate and a drain pan adapter coupled between the drain pan and the heat exchanger. The drain pan adapter may include a coil receiver for engaging a portion of the heat exchanger and a retaining arm that reduces an amount of the air flow over the portion of the heat exchanger.