The Lennox Merit PSC Air Handler comes in is a reliable and affordable component designed to circulate air efficiently throughout a home when paired with a compatible air conditioner or heat pump. It uses a Permanent Split Capacitor (PSC) motor and features durable construction for long-lasting performance. Comes in these sizes:1.5, 2, 2.5, 3, 3.5, 4 and 5 Ton.