Will my insert work in the case of a power failure?

Your insert can be used in a power failure. An insert is built like a wood stove. The only thing that will not work in a power failure is the blower. Operating your insert without the blower will not damage the unit. The disadvantage is that you will not benefit from the heat circulation around the insert’s jacket. Inserts come with a blower because a large portion of the unit is inserted into a masonry opening. The heat that radiates from the portion of the firebox inserted into the masonry hearth does not reach the room as it would with a freestanding wood stove. This is why inserts have a jacket built around the back portion of their firebox. The heat is trapped inside that jacket and is pushed back in front of the stove and into the room with a blower. Without electricity, you will not recover as much heat from the unit. The radiating heat will come mainly from the glass and the front portion of the insert.