Thermoboxes

A Neverdark Thermobox is the insulated steel enclosure that transforms a burner into a finished, installation-ready fireplace. It is what sets Neverdark apart from standard bioethanol housings — and it is the reason these fireplaces can go places others cannot.

Most bioethanol fire housings are un-insulated. That means they generate heat on the outside of the unit, which requires a safe clearance distance from any surrounding combustible materials — timber framing, MDF, shelving, or plasterboard. A Neverdark Thermobox is insulated to a standard that eliminates that restriction entirely. It can be built directly into combustible surrounds, installed flush inside a wooden media unit, and positioned immediately beneath a television without any heat management concerns. 

There are two Thermobox families. The TSS, TLC, TRC, TTS, TRD, and TST models are designed for the Firetec and Automatic burners, covering single-sided, corner, three-sided, room divider, and see-through configurations. The Chalet-I Box and C2 series are made for the Chalet-I and Chalet-II, in standard and hidden installation formats. All Thermoboxes are made to order. Lead times are typically 6–8 weeks. Contact us to confirm which model suits your burner and installation.

 

FAQs

These fireplaces are made to order — what does that actually involve?

Every Neverdark fireplace is built to your chosen size and specification, which means nothing is taken off a shelf. Once you've confirmed your model, dimensions, finish, and any optional extras, the order goes into production. Lead times are typically 6–8 weeks. Get in touch and we'll guide you through the choices from the start.

Do these fireplaces need a gas supply, chimney, or special electrical connection?

None of the above. Neverdark fireplaces run on bioethanol and produce a real flame with no smoke, no ash, and no combustion byproducts beyond a small amount of CO₂ and water vapour — the same as a candle, at a far greater scale. No flue, no chimney, no gas line, and no specialist electrical work is required. A standard 230V socket is needed for models with automatic refuelling and smart controls.

How does the automatic refuelling system work?

On Firetec and Automatic models, the fuel tank refills itself at the press of a button — you don't manually pour fuel into the burner. An external module handles the fuelling and control, and the system includes smart sensors that monitor operation continuously. The fireplace will not ignite if conditions are not safe, and it shuts down automatically if anything falls outside normal parameters.

Can these fireplaces be controlled from a phone or integrated with a smart home system?

Yes. Firetec and Automatic models can be operated via touchscreen, remote control, and mobile app — ignition, flame height, and shutdown all from your phone. Smart Home integration with systems such as Google Home, Amazon Alexa, and KNX is available as an optional extra. If smart home compatibility is important to your project, mention it when you get in touch and we'll confirm which models and integration options apply.

What finish options are available, and can the fireplace be made to match our interior?

Matte black is the standard finish across most of the range. The Firetec and Chalet models can also be specified in INOX (brushed stainless steel), light bronze, dark bronze, or any RAL colour in matte or gloss — giving you a finish that works with almost any interior palette. Finish options vary by model, so it's worth discussing your project with us before confirming an order.

Can we see the fireplaces in person before ordering?

Yes. The full Neverdark range can be viewed at our partner showroom in London, where technical and design support is also available. Viewing is by appointment — get in touch to arrange a visit.