Maple Syrup Evaporators Maple Syrup Evaporators Built here in Central Wisconsin. We are offering them in three Standard Sizes. Wood Fired Arches, With Tig Welded Stainless Steel Pans. Maple Syrup Evaporator Details Maple Syrup Evaporator Small 2 ft x 6 ft. Maple Syrup Evaporator Medium 2 1/2 ft x 7 1/2 ft Maple Syrup Evaporators Large 3 ft x 12 ft