$14,620.00
Introducing the Stûv 21‑125 SF, a single-faced built‑in fireplace with a frameless guillotine glass panel that slides up for spacious, open-fire ambiance, then retracts cleanly behind the firebox when closed—blending atmosphere with efficiency.
This robust model requires a rough opening of approximately 1250 mm W × 1115 mm H × 563 mm D, tailored for generous masonry or modern-clad installations where fire should be the focal point.
Nominal heat output: (≈18 kW), comfortably heating up to (~167 m²) of living space.
Efficiency: ~77% with closed or partially raised glass
Burn chamber capacity: Generous combustion chamber handling logs up to 40″ (≈100 cm).
Retractable guillotine door: Glass panel disappears behind the firebox when lifted; tilts forward for cleaning and maintenance when fully lowered.
Convection airflow system: Four 6″ room-air inlets/outlets moderate combustion chamber temperature and redistribute heat naturally—no fan required.
Service-friendly design: Hidden slides, pulleys, and cables remain accessible without disassembling surrounding finishes.
Zero-clearance build-in: Fits flush into stone or drywall surrounds with optional minimalist steel front frames (e.g., SF5/SF6) or metal cladding in various finishes.
Outside Air Kit: Optional airtight external combustion air inlet (Ø 6″ / 150 mm) maintains indoor air quality in sealed homes.
Accessories available: Guillotine spark screen, linear convection grilles, mobile log racks, adjustable stands, finish panels, and more
Seamless flame immersion: Frameless guillotine glass fully retracts to maximize fire visibility.
Commanding presence: Generous heat output and log capacity make it ideal for large open spaces.
Clever thermal engineering: Natural convection system ensures clean, consistent warmth without noise.
Designer integration: Steel frames, cladding, and minimal finishes support architectural elegance.
Available on backorder
| Feature | Specification |
|---|---|
| Opening Dimensions | ~1250 × 1115 × 563 mm |
| Viewing Glass | (~1070 × 535 mm) |
| Nominal Heat Output | (~18 kW) |
| Heating Coverage | (~167 m²) |
| Max Log Length | Up to 40″ (~100 cm) |
| Nominal Efficiency | ~77% |
| Convection System | Room-air inlets & outlets (four 6″ grills) |
| Maintenance Access | Tilt-out glass, hidden slides & pulleys |
| Installation Type | Zero‑clearance built-in |
| Combustion Air Intake | Optional Ø 150 mm external air kit |
| Weight | (~405 kg) |
| Fuel Type | Seasoned hardwood |
