Uses automatic climate control which adjusts heat output and fan speed higher or lower at all times to maintain the set temperature. Top-mounted, mechanical controls. Advanced safety features include cool-touch cabinet and grill and non-glowing heating element. Dimensions of 11-7/8 in H x 9-1/2 in W x 11-3/4 in D. Maximum output of 5122 Btu ft/hr on high heat, 2559 Btu ft/hr on low heat, at maximum temperature. Usage large room 16 x 16 ft with 8 ft ceiling.