The Ashley direct vent gas heater requires NO electricity. With three different models to choose from, BTU's/Hr range from 8,000-17,000 depending on which size is installed. The smallest unit can heat up to 200 sq. ft. and the largest will heat up to 425 sq. ft. These units mount on any outside wall for direct venting. The matchless piezo ignition makes lighting easy. The automatic shutoff and thermocouple safety valve makes this unit safe in any room in your home All venting accessories are included.