Echelon Series Home / Our Specialties / Fireplaces / Gas - Linear / Echelon Series Echelon II 36 Viewing Area 35-1/2”W x 12-1/2”H BTU 30,000 - 27,000 Heating Capacity Fuel Type Gas Echelon II 48 Viewing Area 47-1/2”W x 12-1/2”H BTU 40,000 - 34,000 Heating Capacity Fuel Type Gas Echelon II 60 Viewing Area 35-1/2”W x 12-1/2”H BTU 50,000 - 37,500 Heating Capacity Fuel Type Gas Echelon II 72 Viewing Area 71-1/2”W x 12-1/2”H BTU 58,000 - 45,000 Heating Capacity Fuel Type Gas Heat Management Heat Out Heat Zone Passive Heat Kit