Havells HP20, 30, 40, 50 (200, 300, 400, 500 Liter) Heat Pump: This efficient 200-liter, 300-liter, 400-liter, 500-liter heat pump is perfect for larger families. It uses advanced Micro Channel Heat Exchanger technology to save up to 75% on energy costs. The Feroglas coated tank ensures durability even with hard water, and the digital controller makes it easy to use. Plus, it's proudly made in India. Welcome Havells heat pump.