Gas Fireplace.

Some US states, including California, have banned un-vented gas fireplaces. Even where they are allowed, it is only in older homes, typically pre-1980. Certainly a very bad idea in any insulated, tightly-built new home.

There are two types of vented gas fireplaces: B vent, where the incoming air is taken from the house and direct vent, which are sealed units that draw air from the exterior and vent to the exterior.

https://www.bing.com/search?q=ventless+or+vented+fireplace&qs=SC&pq=ventless+or+vented+fireplaces&sc=2-29&cvid=EBDE74AA9BDB48DD933FAA2FDD30C74D&FORM=QBLH&sp=1

My friend lost her husband to Carbon Monoxide Poisoning. Very nasty. He had just retired, and they'd just welcomed their first grandchild. The worst part: It was so avoidable. So, so avoidable.

Take precautions.

If you are in a location where wood burning is allowed, check out the Phenix Green fireplace. Efficient, easy to use, fast fire, great fire view and FAPP can be faced with whatever you want. We have had ours three years and it is amazing. Pretty sure they have a gas version, too.

No on unvented. Too dangerous.

ditto.....

Thank you for the comments. We went to two different fireplace speciality stores and the one said we needed the ventless fireplace and the other said definitely not so we decided to do some research. We didn't know who to trust so that is when I decided to post our question on Houzz!!! Thank you!