Blaze King King

Blaze King’s biggest burn-time story – the King 40 is built around Blaze King’s renowned catalytic system and built-in thermostat, delivering the longest burn times in the lineup with up to 40 hours on low.
Extra-large firebox for serious heating – with a massive 4.25 cu. ft. firebox, the King 40 is designed for homeowners who heat larger spaces and want fewer reloads, longer steady burns, and more overall heating capacity than smaller catalytic stoves can offer.
Built for full-time wood burners – Blaze King positions the King 40 as a high-output, high-efficiency catalytic stove for people who rely on wood heat day in and day out, not just for occasional atmosphere.

Starting at $5847.00

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The Blaze King King 40 is built for homeowners who want the biggest, longest-burning freestanding wood stove in Blaze King’s lineup. This is the heavy hitter in the family — a stove designed for people who heat seriously with wood and want to stretch burn times as far as possible without giving up steady, usable heat. Blaze King’s product materials emphasize that the King can run for up to 40 hours on low or deliver strong heat for 12 to 16 hours on high, depending on installation and wood type. That is the headline here, and frankly, it is a pretty loud one.

What makes the King 40 stand out is the scale of the platform itself. Blaze King’s current brochure lists a 4.25 cu. ft. firebox capable of holding up to 80 lbs. of wood, which is a major step up from the Princess 32 and well beyond the 20- and 30-series stoves. That larger firebox is a big part of why the King can deliver such long controlled burns. Paired with Blaze King’s catalytic combustor and bi-metal thermostat, it is built to maintain more even heat over long stretches instead of racing through a load and demanding another refill a few hours later.

Another major strength is the way it balances size with control. Big stoves can be impressive on paper, but they are far more useful when they can actually burn low and steady without turning the room into a sauna. Blaze King’s thermostat-controlled catalytic system is what makes the King 40 different from a lot of oversized wood heaters. Current Blaze King materials list 81% EPA listed efficiency, while older brochures have shown 82%, so for consistency I would use the newer 81% figure going forward. Blaze King also offers the King 40 in multiple appearance packages including Classic Base, Ultra Pedestal, and Parlor Legs, which gives buyers a bit of flexibility in how traditional or straightforward they want the finished stove to look.

For homeowners who want a premium catalytic wood stove with exceptional burn time, an extra-large firebox, and the kind of steady full-time heating Blaze King is known for, the King 40 lands in a class of its own. It is not a casual little evening-fire stove. It is built for buyers who want maximum burn time, maximum fuel capacity, and a stove that can carry real heating weight through a long winter.

Technical Specifications

Appliance Type: Catalytic freestanding wood stove.
Available Models / Configurations: King 40 (KE40) with Classic Base, Ultra Pedestal, or Parlor Legs.
Firebox Size: 4.25 cu. ft.
Maximum Log Length: Up to 22″.
BTU Output: 57,000 BTU/h max.
Burn Time on Low: Up to 40 hours.
Efficiency: 81%.
Particulate Emissions: 1.1 g/hr.
Heating Capacity: 1,500 to 3,000 sq. ft.
Flue Size: 8″