Heavy duty heater from Saco we kept in our gazebo. It was a 3m by 7.5m space and this heater warmed up the entire room in less than 10 minutes. Goes up to 3000 watts if I recall correctly. Can be hung on the walls through screws, has an extension rod that can be attached to the base to make it stand too. Was originally for 1100 but selling it for 400. Do let me know if you'd be interested. Will easily warm up your balcony during winter.