Versatile Design

Sirocco 25

The Sirocco 25 is a medium sized fireplace insert. At 2.3 cu. ft., the firebox will take up to a 22" log and can deliver warmth for up to 25 hours on low. The Sirocco 25 is very clean and efficient and can heat from 400 - 1,800 sq. ft. This flush insert extends to only 2.6 inches from the face of the fireplace to the door opening, helping to keep hearth protection to a minimum. The door features a large, 24" x 11", wide-screen glass viewing area with a nickel plated and hand made olive-wood door handle. Attention to detail is evident from the layered surround panel to the unique control system that allows you to select the heat you want.

40,000 BTU's

Cord Wood Max BTU



25 hours

Burn Time on Low


  • Real World Tested Performance
  • Cord Wood Max BTU
    40,000 BTU's
  • Efficiency
    77% (As listed by EPA)
  • Maximum Heat Input
  • Constant Heat output on High
    29,966 BTU's/h for 8 hours
  • Constant Heat output on Low
    9,589 BTU's/h for up to 20 hours
  • Square Feet Heated
    400 - 1,600
  • Average Heating Time
    8 to 13 hours
  • Potential Burn Time on Low
    25 hours
  • Emissions (grams/hour)
    0.9 g/hr
  • Firebox Capacity
    2.3 cu.ft.
  • Flue Size (do not reduce)
  • CO Weighted Avg (g/mm)
    0.41 g/min


  • Minimum Fireplace Opening
    29” wide x 22” high x 19” deep
  • Mantle Clearance
    20” from top of door opening
  • Weight
    325 lbs. / 147.4 kg
  • Flue Diameter
    6" / 152.4mm
  • Firebox size D x W1 (W2) x H
    163/4” x 20½” (18”) x 10”
    (W2 = at front of firebox, W2 = at back of firebox)


  • 3 shroud options


The Sirocco 25 has a flush design with large viewing glass. It features a built-in Thermostat (no electricity required) that allows you to control the heat output by up to 70% and use 33% less wood. Extra-long burn times are achievable, and Blaze King offers a 100% 10-year Combustor warranty.