What's a Ventless Fireplace?

Ventless fireplaces are also known as "unvented" or "vent-free" fireplaces. They're a type of fireplace that pipes natural gas or propane into a gas-burning unit. ... They're actually designed to burn gas more efficiently than vented versions, so they produce less fumes and don't require a flue or a chimney.

Are ventless fireplaces any good?

Ventless fireplaces produce small amounts of nitrous dioxide and carbon monoxide which can be deadly in large doses. The CDC warns against exposure of any level of carbon monoxide, stating that up to 500 people die per year due to accidental carbon monoxide poisoning.

Which is better vented or ventless gas fireplace?

Ventless fireplaces are more energy efficient than vented fireplaces because no heat escapes up the flue, so you'll save money on gas utility bills. A vented gas fireplace uses more gas to create the same level of warmth because some of its heat escapes through the flue.