The lowest cost ventless gas stove with installation costs about $2,000. A high-cost installation for a premium model vented gas stove with installation is around $3,600.

The ventless gas fireplace runs on natural gas or propane and includes a built-in pilot oxygen depletion sensor. There's no remote control, but you can adjust the thermostat.

The Handyman cautions against relying too much on a ventless gas fireplace for heat, worrying the warning devices for carbon monoxide may fail, or they emit so much water vapor they cause mold.

Thinking about buying a gas fireplace? We break down the different types and give you the tools to choose the perfect gas fireplace for your home.

The gas fireplace industry says ventless fireplaces are safe to use — in fact, much safer than wood-burning fireplaces, which are blamed for several hundred fires and several deaths every year.