The Seasonal Energy Efficiency Ratio (SEER) rating of an air conditioning system represents its efficiency in cooling. The SEER rating is determined based on the overall performance of the entire system, including both the outdoor condenser unit and the indoor air handler or furnace.
It is not accurate to claim that the SEER rating of the outdoor condenser unit alone can be increased by the air handler and TXV (Thermal Expansion Valve). The SEER rating of the complete system is determined by the matched components installed together, including the condenser, air handler or furnace, and other related equipment.
The Goodman GSXN406010AA is the outdoor condenser unit, and the CHPT4860D4AA is the corresponding air handler. To achieve the SEER rating mentioned for this system, both components must be appropriately matched and designed to work together to provide the specified efficiency.
If your HVAC professional is claiming that the SEER rating increases to 16 due to the air handler and TXV, it's essential to seek clarification and ask for supporting documentation or references from the manufacturer to confirm this claim. Manufacturers usually provide detailed information about the matched components and their combined SEER rating.
Installing mismatched components can lead to inefficiencies and potentially void the warranty. To ensure that your HVAC system operates at its highest efficiency and meets the advertised SEER rating, it's best to use components that are specifically designed and rated to work together as a matched system. If you have concerns or doubts, consider getting a second opinion from another qualified HVAC professional before proceeding with any purchase or installation.