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Is a ventless gas fireplace safe, given it has no chimney or vent? Here's what you'll want to know before you buy one for your home.
If ventless gas fireplaces are legal where you live and you choose to install one, reduce potential dangers by carefully following the manufacturer’s directions. The following tips will also...
A ventless gas fireplace offers better energy efficiency with no heat loss, and they have an aesthetic appeal. Some disadvantages of ventless gas fireplaces include indoor air quality concerns, the potential for moisture buildup, and oxygen depletion.
Pictured: Superior VRT3542 42" Traditional Vent-Free Gas Fireplace With White Stacked Refractory Panels Ventless gas fireplaces burn gas (either natural gas or propane) and release heat directly into the room, allowing the byproducts of combustion—like water vapor and carbon dioxide—to enter the space instead of venting outside.
Hazard Concerns. Digging deeper, we find that the concerns about vent-free hearth appliances boil down to a) concerns about indoor air quality and b) concerns about property damage. In truth, everyone should be concerned with both. Let's look at each in detail.
Improper installation, improper fireplace sizing, improper use, and appliance failure can all lead to major safety issues. In fact, health concerns over the use of this appliance have led some countries and states within the US to ban vent-free gas fireplaces.
Ventless gas fireplaces can generate moisture and emit combustion by-products like nitrogen dioxide and carbon monoxide into the room, which might affect indoor air quality. However, they are designed to shut off before carbon monoxide reaches dangerous levels.