Fusion 24

About the Fusion 24

Supreme's flagship wood insert — on display in our showroom. The Fusion 24 slides into your masonry fireplace and turns it into a 75,000 BTU/hr heater with the industry's largest insert firebox, 5-10 hour burns, and a sleek flush-mount face.

The Fusion 24 seamlessly and attractively brings modern-day heating technology to an existing masonry fireplace. Its expansive 2.94 cu ft firebox — the industry's largest in an insert — takes 21" logs and delivers up to 75,000 BTU/hr for 5 to 10 hours on a single load, heating 500-2,000 sq ft. Three patented technologies underpin its operation: the Automatic Air Control tapers ignition air to your chosen burn rate for consistent, long-lasting fires; the circulating chamber stops heat from escaping up the old chimney; and the perforated baffle keeps the big viewing panel clear while stretching burn times. A hushed dual-fan system moves the heat through large areas, and the optional built-in barbecue grill lets you cook over the embers year-round. EPA 2020 certified at 1.54 g/h, and it installs on a 5" liner — ideal for narrow masonry chimneys. See it burning on display in our Ephrata showroom.

Features

• Patented Automatic Air Control — set the burn rate and the insert automatically tapers ignition air to it
• Patented circulating chamber keeps heat from escaping up the existing chimney
• Dual heat-activated blowers (110 CFM total) with a variable speed control hidden on the surround
• Perforated baffle design — unimpeded view of the fire with longer burn times
• Flush-mount surround in Metallic Black complements any decor
• Optional built-in barbecue grill attaches inside the firebox
• Installs on a 5" liner — ideal for narrow masonry chimney openings

Insert 27"W × 23½"H × 19"D — fits masonry openings from 32"W (front) × 23¼"H × 19"D; surrounds cover up to 42" × 28"

Will it fit?

Minimum fireplace opening

32" × 23¼" × 19" (W × H × D), 22" across the back

Insert body

27" × 23¼" × 19" (W × H × D)

Chimney

5" stainless-steel liner required (adaptor IN1110 included), 15 ft min / 35 ft max; masonry fireplaces with a continuous liner only

Liner / vent

5"

Heat output

75,000 BTU/hr (turns down to 16,266)

Heating area

500–2,000 sq ft (manufacturer's rating)

Max log length

23"

Firebox size

2.94 cu ft

Burn time

5 to 10 hrs

From the manufacturer's documentation (page 12). We confirm every measurement on the site visit before anything is ordered.

Documents

• 📄 Fusion Series Brochure
• 📄 Fusion 24 Installation & Owner's Manual