Cedar Ridge Recon Dual Fuel Vent Free Infrared Heater - 4 Plaque, Model# MD4TPU 25,000 maximum BTU when using natural gas 24,000 maximum BTU when using liquid propane Heats up to 1,000 sq. ft. No outside duct or chimney needed Dimensions: 27.95"W x 7.4"D x 18"H