This Samsung 48,000 BTU Hylex Hybrid Heat Pump has 100% rated heating capacity at 5F outside temperature . This heat pump is inverter driven and can be set up to be cooling only, heating only or both, making the system extemely versatile for its users. Being constructed with galvanized steel, this unit has been built to last - it is a reliable and durable piece of equipment that gives users ultimate control over room temperatures.