Available in both heating-only and combi versions - Insulated for ultra-quiet operation - Compact wall-hung and floor-standing designs - Wall model: ZWB 42-3AFuel Type: Propane, Natural Gas - BTU Input: 151000System Type: Hydronic (Water)Width (Inches): 17-1/4"Depth (Inches): 14"Height (Inches): 33.5"Weight (lbs): 110 lbs