ADP 400K BTU Separated Combustion Single-Phase 115V Natural Gas Unit Heater

The ADP 400K BTU Separated Combustion Single-Phase 115V Natural Gas Unit Heater is a solid choice for warming up your space. This unit quietly and smoothly gets the job done, offering up to 82 percent thermal efficiency. It features a direct spark ignition for reliable startup and a self-diagnostic DSI control board that helps keep things running smoothly. You'll appreciate that its sidewall venting option means no need to mess with your roof. Plus, the combustion air is kept separate from the air in your heated area, making for a cleaner operation. This heater is built to perform, with a power exhaust that lets you vent it either vertically or horizontally.