B vent fireplaces are very affordable, which makes them very appealing for many homeowners, contractors and builders. And B vent fireplaces work like a traditional fireplace. They are open and pull air from the room that they're installed in to feed their fire. Another advantage of natural vent fireplaces, is that they generally aren't susceptible to excessive draft problems. This is partially because of the draft hood that draws in excess air to moderate strong draft and the one-inch clearance to combustibles.
Most homeowners choose B vent fireplaces because of their affordability and aesthetic appeal. They want a fireplace that looks good or falls in their price range, but they're not concerned about using it as a heat source. For the homeowner that's looking for an efficient heating unit, consider a direct vent or vent free unit. However, if price and appearance are your biggest concerns, a B vent fireplace will be your best option.