This Reznor heater, Model Photon 20-2, is a powerful 20 kW heating system designed for forced air/fan heating. It runs on natural gas (NG) and has a voltage requirement of 240V, with single phase power supply required. This is ideal for business, office, and industrial use. It has only been used for 3 days and is still in excellent working condition. The Reznor heater is a top-quality product that ensures effective heating and is worth investing in.