Central Air Systems

Central air systems deliver whole-home comfort through matched indoor and outdoor equipment. Whether you’re replacing a key component or building a full system, performance depends on correct pairing of capacity, airflow, controls, and electrical requirements.

Use this category to shop the most common central-system building blocks: air handlers, condensers, heat pump condensers, and complete matched configurations. We also include communicating systems for advanced diagnostics and staging, plus heat pumps when the application calls for heating + cooling from one outdoor unit.

• Compare capacity (tons/BTU), efficiency ratings, and voltage
• Match indoor/outdoor components for rated performance
• Choose controls: standard vs communicating
• Verify line set sizing, airflow (CFM), and installation constraints

Selection checklist: tonnage, indoor match requirements, refrigerant type, SEER2/HSPF2 targets, voltage/MCA/MOP, duct/static pressure considerations, and code-required electrical components (disconnect/whip).

Pro tip: If you’re only replacing one component, confirm it’s an approved match with the remaining system to avoid efficiency loss and warranty issues.