Jotul GI 645 DV Astrid Gas Fireplace Insert, Firebox with Blower

The Jotul GI 645 DV Astrid is a larger gas insert for homeowners who want an existing fireplace to hold a steady gas fire with simple controls. It uses millivolt gas controls instead of electronic ignition and runs on natural gas or propane.

A blower comes standard to help move warm air into the room, and it runs on household power. The insert vents through two 3-inch flexible liners, which run up the chimney you already have. The minimum fireplace opening is listed below, so it's easy to see whether your fireplace is in the right range before we measure.

What Makes the GI 645 Astrid Different

• Millivolt controls. Straightforward gas controls with no electronic ignition module.
• Blower included. A standard blower helps circulate warm air.
• Lined chimney venting. It vents through two 3-inch flexible liners.

Key Specifications

• Natural gas input: 21,000 to 38,000 BTU/hr
• Propane input: 20,000 to 36,500 BTU/hr
• Venting: Two 3 in flexible liners
• Minimum fireplace opening: Opening 33 3/4 in wide x 24 in high; inside depth 16 1/2 in; inside width 23 3/4 in; inside height 19 in. See the manual for every minimum.

BTU inputs are Jotul's ratings. Comfort in your home depends on the room, the fireplace, and how the insert is installed and used.

Every fireplace is a little different inside, so we measure and check the chimney before we recommend an insert. Browse more gas inserts or stop by our Auburn, Brunswick, and Yarmouth showrooms to talk through fit and installation.