When selecting an air rower, the resistance mechanism is paramount; ensure the flywheel design allows for smooth, progressive resistance that mimics water rowing. The drive system should ideally use a high-strength nickel-plated chain or a reinforced drive belt for durability. For the frame, prioritize extruded aluminum or high-tensile steel rails to support a user weight capacity of at least 150kg (330 lbs). Additionally, the Performance Monitor (PM) must provide real-time data tracking for watts, strokes per minute, and heart rate, with Bluetooth/ANT+ connectivity for app integration.