Neverdark
SKU:
Neverdark Thermobox for CHALET-I
Neverdark Thermobox for CHALET-I
Made to Order
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Payment & Security
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Delivery & Returns
Delivery & Returns
Delivery
- Free UK Mainland delivery on all Smart Fire and Neverdark products.
- Smart Fire and Neverdark fireplaces are made to order and delivered directly by the supplier’s own logistics team from London, not by a courier or pallet network.
- Additional charges apply to Scottish Highlands and rural areas. Please contact us before ordering for a delivery quote.
- We do not currently deliver to Northern Ireland, the Isle of Man, the Channel Islands, or the Scottish offshore islands (Orkney, Shetland and the Western Isles).
- Delivery date and time are agreed with our supplier’s logistics team in advance. If the delivery cannot be completed at the agreed time, re-delivery charges apply.
- Lead times are confirmed at the order stage.
Returns
- Smart Fire and Neverdark fireplaces are made to order and manufactured to your specification. Under UK consumer law, bespoke goods made to order are exempt from the 14-day statutory right to cancel.
- Returns are accepted only if the product arrives faulty, damaged in transit, or is incorrect.
- All faulty or incorrect product returns are arranged directly with the supplier and handled by their logistics team.
- Please inspect your product carefully at the time of delivery and report any visible damage before signing.
For full details, please refer to our Shipping Policy and Refund & Returns Policy.
The Chalet-I Thermobox is the dedicated insulated enclosure for the Neverdark Chalet-I volumetric insert fireplace. It provides the finished housing around the Chalet-I's three-dimensional wood-fire flame — the component that transforms the burner into a complete installation, whether built into a traditional fireplace niche, a bespoke floor portal, or a custom architectural opening.
Enclosing the Volumetric Flame
The Chalet-I's patented volumetric burner produces a three-dimensional flame that rises through a bed of ceramic logs and lava stones — a fundamentally different visual from a linear fire. The Thermobox is sized and shaped specifically to house this burner, framing the opening to present the wood-fire effect at its best. A long glass border is available as an optional extra, adding a glazed front to the opening. Reflection screen and flame decorations are available by model.
Insulation — Why It Matters
What sets every Neverdark Thermobox apart from standard bioethanol housings is the quality of its insulation. The steel enclosure is insulated to a level that eliminates the heat clearance distances that standard uninsulated boxes require. A Thermobox can be built directly into a timber-framed wall, integrated into MDF cabinetry, or positioned immediately beneath a television — situations where an uninsulated housing simply cannot be used safely. That engineering is reflected in the price, and it is what makes these installations genuinely flexible rather than just architecturally attractive.
Hidden and Frame Installation
The hidden variant sits fully flush inside the opening with no visible frame — the surrounding wall finish is uninterrupted around the flame. The frame variant adds a visible border around the opening, suited to installations where a defined surround is part of the design, such as a traditional fireplace niche or a bespoke floor portal with a finished edge.
Made to Order
The Chalet-I Thermobox is available in the standard 650 mm width. Custom sizes are available on request for non-standard openings. Lead times are typically 6–8 weeks. Contact us to confirm the right configuration for your project.
Available Options
- Sizes (standard): 650 mm (custom on request)
- Compatible burners: Neverdark Chalet-I
- Installation type: Hidden (flush, no frame) or Frame (visible border around opening)
- Reflection screen: By model
- Long glass border: Optional
- Short glass border: Optional
- Canopy: Optional
- Flame decorations: By model
Canopy not available on Frame variant.
Prices for optional extras are listed in the Specification tab or available on request.
Key Specifications
- Product type: Insulated Thermobox for built-in bioethanol fireplace
- Brand: Neverdark
- Compatible burner: Neverdark Chalet-I
- Use: Indoor
- Made to order: Yes
Dimensions
- Hidden — W: 655 mm | D: 702 mm | H: 352 mm
- Frame — W: 751 mm | D: 750 mm | H: 354 mm
- Burner length: 650 mm
Materials & Installation
- Material: Steel
- Insulation: Fully insulated — suitable for combustible surrounds
- Colour / Finish: Matte black
- Installation type: Built-in / recessed
- Installation variants: Hidden or Frame
- Power required: Yes (for burner — see burner product page)
- Chimney required: No
Optional Extras
- Installation type: Hidden (flush, no frame) or Frame (visible border around opening)
- Reflection screen: By model
- Long glass border: Optional
- Short glass border: Optional
- Canopy: Optional
- Flame decorations: By model
Canopy not available on Frame variant.
Specifications vary by size and configuration. Contact us for a full specification sheet for your chosen size.
The Chalet-I Thermobox is the dedicated insulated enclosure for the Neverdark Chalet-I volumetric insert fireplace. It provides the finished housing around the Chalet-I's three-dimensional wood-fire flame — the component that transforms the burner into a complete installation, whether built into a traditional fireplace niche, a bespoke floor portal, or a custom architectural opening.
Enclosing the Volumetric Flame
The Chalet-I's patented volumetric burner produces a three-dimensional flame that rises through a bed of ceramic logs and lava stones — a fundamentally different visual from a linear fire. The Thermobox is sized and shaped specifically to house this burner, framing the opening to present the wood-fire effect at its best. A long glass border is available as an optional extra, adding a glazed front to the opening. Reflection screen and flame decorations are available by model.
Insulation — Why It Matters
What sets every Neverdark Thermobox apart from standard bioethanol housings is the quality of its insulation. The steel enclosure is insulated to a level that eliminates the heat clearance distances that standard uninsulated boxes require. A Thermobox can be built directly into a timber-framed wall, integrated into MDF cabinetry, or positioned immediately beneath a television — situations where an uninsulated housing simply cannot be used safely. That engineering is reflected in the price, and it is what makes these installations genuinely flexible rather than just architecturally attractive.
Hidden and Frame Installation
The hidden variant sits fully flush inside the opening with no visible frame — the surrounding wall finish is uninterrupted around the flame. The frame variant adds a visible border around the opening, suited to installations where a defined surround is part of the design, such as a traditional fireplace niche or a bespoke floor portal with a finished edge.
Made to Order
The Chalet-I Thermobox is available in the standard 650 mm width. Custom sizes are available on request for non-standard openings. Lead times are typically 6–8 weeks. Contact us to confirm the right configuration for your project.
Available Options
- Sizes (standard): 650 mm (custom on request)
- Compatible burners: Neverdark Chalet-I
- Installation type: Hidden (flush, no frame) or Frame (visible border around opening)
- Reflection screen: By model
- Long glass border: Optional
- Short glass border: Optional
- Canopy: Optional
- Flame decorations: By model
Canopy not available on Frame variant.
Prices for optional extras are listed in the Specification tab or available on request.
Key Specifications
- Product type: Insulated Thermobox for built-in bioethanol fireplace
- Brand: Neverdark
- Compatible burner: Neverdark Chalet-I
- Use: Indoor
- Made to order: Yes
Dimensions
- Hidden — W: 655 mm | D: 702 mm | H: 352 mm
- Frame — W: 751 mm | D: 750 mm | H: 354 mm
- Burner length: 650 mm
Materials & Installation
- Material: Steel
- Insulation: Fully insulated — suitable for combustible surrounds
- Colour / Finish: Matte black
- Installation type: Built-in / recessed
- Installation variants: Hidden or Frame
- Power required: Yes (for burner — see burner product page)
- Chimney required: No
Optional Extras
- Installation type: Hidden (flush, no frame) or Frame (visible border around opening)
- Reflection screen: By model
- Long glass border: Optional
- Short glass border: Optional
- Canopy: Optional
- Flame decorations: By model
Canopy not available on Frame variant.
Specifications vary by size and configuration. Contact us for a full specification sheet for your chosen size.