The Stûv 6-in 46×55 Wood Burning Insert is the most compact built-in model in the Stûv 6-in range, designed to bring the character of a real wood fire back into smaller fireplaces and tighter installation spaces. It combines a wide flame view with a compact cassette format, making it especially well suited to replacing an older insert or upgrading an open fireplace with a cleaner, more efficient solution.
A key strength of the 46×55 is how much fire view it offers for its size. As part of the Stûv 6 collection, it uses the brand’s distinctive curved combustion chamber profile to support natural airflow and create a broader view of the flames. The result is an insert that feels more open and visually generous than its physical size might suggest. It is built from steel and cast iron, with the cast iron chamber helping deliver durability, heat resistance and long-term performance.
In technical terms, the 46×55 is a compact but capable model. It delivers a 4.9 kW nominal output, with an output range of 4 to 7 kW, 80% efficiency and an energy efficiency class of A+. It burns 20 cm logs in a vertical position, weighs 60 kg, and uses a 130 mm flue outlet with a 100 mm outside air inlet. It operates without a fan and uses integrated convection, with no hoses or grilles required. This makes it especially attractive where installation simplicity and small depth matter.
Key Features:
- Compact built-in wood burning insert
- Smallest Stûv 6-in model
- Wide flame view
- Steel and cast iron construction
- Integrated convection
- Operates without fan
- Optional direct external air inlet
- Rear or vertical smoke outlet
- 4.9 kW nominal output
- Output range 4 to 7 kW
- 80% efficiency
- Energy efficiency class A+
- Accepts 20 cm logs
- Installation box concept
- Optional frames available
Stûv 6-in Frame Options:
The Stûv 6-in inset wood burning fire is available with four frame styles to suit different fireplace designs and installation requirements. Options include a flush-mounted slim frame, thin flush frame, 4-sided applied frame, and 3-sided applied frame, allowing a neat and tailored finish around your Stûv 6-in wood burning insert.
Expert Insight
The 46×55 is the most compact and easiest-to-place insert in the Stûv 6-in family. That makes it especially useful where the goal is to revive a smaller existing fireplace opening without overloading the room with too much heat output or too large a firebox.
It is also the only model in this range where a fan is listed as unavailable, so it is best understood as a natural-convection insert designed for simpler, more compact installations.
Suitability
The Stûv 6-in 46×55 Wood Burning Insert is well suited to small fireplace openings, older chimney breasts, snugs, and interiors where a compact, efficient built-in wood fire is wanted with a clean modern look.
Installation / Technical Notes
This model weighs 60 kg, accepts 20 cm logs, uses a 130 mm flue outlet and a 100 mm outside air inlet. Minimum insulation thickness is 9 cm at the back, 4 cm at the sides, 11 cm above and 5 cm below.
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