Dimensions: 15L x 10W x 10H in.. 5200 BTU output. Aluminum construction with IPX4 water resistance. 150 sq. ft. maximum room coverage. Lightweight for portability. Minimal maintenance necessary. Protect your greenhouse plants from winter's freezing temperatures with the Dr. Infrared Heater DR-218 Greenhouse Heater 1500W. Using fan-powered air flow, this USA-made heater provides your warm-weather flowers and greenery an environment suitable to their needs. It features a temperature sensor to prevent overheating as well as thermostat and fan speed dials. Its small size allows easy portability, and its simple green and black design will blend in to your garden of colorful blooms.