Fresh 19++ Standard Fireplace Sizes
Fresh 19++ Standard Fireplace Sizes. Backyard fireplaces can be created in a variety of sizes according to your needs and the scale of your yard. Gas fireplaces can be built in smaller sizes that won't overpower a modest yard. Fireplace flue size specifications relation of fireplace size to flue opening dimensions, table of required chimney flue size and flue dimensions for masonry fireplaces. Above is a photo of a masonry firebox in my.