Best gas fireplace inserts

Top pick: Monessen Solstice 33 ventless insert — it's the most complete package here: firebox, logs and a 135 CFM blower included, so it actually pushes heat into the room rather than just looking good. Ventless means no chimney work, which suits most retrofits.

Who the others suit:

• Empire Loft Medium vent-free — if you want a contemporary look and a brand with a long fireplace pedigree.
• Empire Innsbrook 28" vent-free — a simpler millivolt on/off control, good for a smaller opening.
• Duluth Forge 26,000 BTU ventless — the biggest stated heating area of the ventless group.
• ProCom dual fuel ventless — the budget route; runs on natural gas or propane, modest heat.
• Majestic Trilliant 35 direct vent and Empire Rushmore 30 direct vent — pick these if you have a flue and want a sealed, more realistic fire; they cost more and need venting.
• Gi33 Atmosphere — the premium direct-vent choice with the highest efficiency figures listed.

Check your opening's dimensions and whether you have a flue before choosing vented vs ventless.