LG Electronics has introduced the first single-phase variable refrigerant flow 5-ton heat recovery unit for residential applications. The Multi V S system includes 2-ton heat-pump and 5-ton heat-recovery models for simultaneous heating and cooling at a more energy efficient rate. The 5-ton system closely matches compressor speed with demand and can control individual room temperatures for up to 12 zones. Price varies by dealer. lghvac.com