The Stûv 6-in 66×55 Wood Burning Insert is a medium-format built-in wood burning insert that combines a strong flame view, good nominal output and compact installation depth. It shares the same width as the 66×50, but with extra height that changes the proportions of the fire and gives a slightly taller visual presence.
This model uses the Stûv 6 curved firebox profile to deliver a broad and visually open flame picture, while the steel and cast iron construction supports durability and efficient heat performance. It can operate with natural convection or fan-assisted convection, and optional ducted convection is also possible, making it adaptable to a wider range of installation requirements. Like the other models in the family, it supports external air connection from below or the rear and can use oblique or vertical smoke outlet arrangements.
In performance terms, the 66×55 delivers a 7.6 kW nominal output, with an output range of 5 to 9 kW, 79% efficiency and an energy efficiency class of A. It accepts 40 cm logs in a horizontal position, weighs 95 kg, and uses a 150 mm flue outlet, 150 mm hot air outlets and a 100 mm outside air inlet.
Key Features:
- Medium-format wood burning insert
- Slightly taller 66 cm wide model
- Wide flame view
- Steel and cast iron construction
- Natural or fan-assisted convection
- Optional ducted convection
- Optional direct external air inlet
- Oblique or vertical smoke outlet
- 7.6 kW nominal output
- Output range 5 to 9 kW
- 79% efficiency
- Energy efficiency class A
- Accepts 40 cm logs
- Optional finishing frames
- Installation box concept
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 66×55 is often the more visually balanced choice over the 66×50 if the fireplace opening has a little more height available. It keeps the same width but gives a taller flame picture, which can help the fire feel more substantial and upright within the opening.
It also offers slightly stronger nominal output than the 66×50, making it the better option if the room needs a little more heating capacity without stepping up to the wider 76 cm models.
Suitability
The Stûv 6-in 66×55 Wood Burning Insert is well suited to standard and medium-sized fireplace openings, living rooms, and projects where a balanced inset fire format is wanted with strong efficiency and a broader flame picture.
Installation / Technical Notes
This model weighs 95 kg, accepts 40 cm logs, uses a 150 mm flue outlet, 150 mm hot air outlets, and a 100 mm outside air inlet. Minimum insulation thickness is 4 cm at the back, 8.5 cm at the sides, 4 cm above and 8 cm below.
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