ARDENTE DUO tunnel fireplace inserts
ARDENTE DUO are the most technologically advanced air fireplace inserts in the HITZE offer. They impress with their durability, functionality and economy of work, being at the same time the best choice for those who above all appreciate the aesthetics of the home interior. Thanks to the glazing on both sides, the ARDENTE DUO is ideally suited for both island building and effective room combination.
ARDENTE DUO - double the joy of fire
Glazing at the front and back makes the ARDENTE DUO an air fireplace insert with a minimalist design, whose decorative panes greatly enhance the vision of the fire. It is a unique solution that will work not only at home, but also in the orangery or a built-in gazebo by the house, giving a unique atmosphere every evening and, of course, ensuring family warmth for everyone.

Fans of minimalist elegance will also appreciate the ELEGANCE décor finishing of the fronts, which gives the fireplace an even more unique aesthetics. That is why ARDENTE DUO is recommended by architects and will prove itself in every modern home, perfectly matching the Scandinavian, minimalist, loft or glamour style.

Not only aesthetics, but also durability and power

Warmth from nature

The ARDENTE DUO tunnel air inserts is, of course, also excellent parameters which enable effective heating of rooms in houses and orangeries. This is due to two massive deflectors made of ceramic concrete, which increase the temperature and lengthen the burning time, and the central afterburner TURBO BURN, which increases the amount of thermal energy. High efficiency goes hand in hand with economy - the TURBO BURN system reduces

wood consumption as well as comfort of use, which is influenced by trouble-free cleaning of the fireplace and its faster firing (thanks to a large cast iron grate).

It is also worth noting the steel body of the fireplace insert, which ensures not only long-term durability of the fireplace, but also the extension of the period of heat dissipation, which results from the increase in its mass.

air inserts also provide:
  • maximum safety in use, thanks to a ventilated handle, a muted, reinforced and tight proLIFT guillotine and an integrated air intake with two dampers;
  • solid and trouble-free connection of the chimney, resulting from the use of a 360º cast iron flue pipe;
  • easy cleaning, thanks to the EASY CLEAN cast iron hinged grate;
  • adjustable feet (up to +4 cm) to ensure stability of the fireplace;
  • the possibility of larger loads, and thus less frequent adding of wood;
  • no emissions of harmful exhaust fumes and therefore full environmental compatibility of the product.
A wide range of adjustable power (6-28.5 kW) will allow everyone to choose the ideal solution that will provide maximum thermal comfort without the risk of overheating the room.
Cast iron flue ø200 mm with regulation 360º

guarantees tight connection of the fireplace to the chimney duct and ensures proper burning in the fireplace.

A solid steel body

30% higher weight*
* In comparison with the models from the Albero line.

Two ceramic concrete deflectors

optimizes burning process due to the increase of temperature inside the chamber.

Guillotine proLIFT with service access

2 types of service access depending on the size of the cartridge.

Heat pipes

increase the area of heat exchange and accumulation (from 3 to 6 pcs depending on the model)

Clean glass system

Two-way air steering with air curtain.

Steel door

made of a special profile that guarantees stiffness and high temperature durability.

DECOR ELEGANCE glass with print

Optional double glass system.

Regulated feet

in the range of 4 cm. allow positioning the fireplace insert securely and stably even on the unstable surface. ADDITIONAL OPTION: raising the feet in the height of +10 cm with adjustment +/- from 3 to 5 cm.

Hinged cast iron grate EASY CLEAN

for the convenience of cleaning the hearth.

Afterburning system TURBO BURN

increases thermal energy volume, reduces the emission of harmful substances to the environment and improves fuel saving

Ceramic insert SIZE+

Cartridge with enlarged, deep rectangular combustion chamber giving the possibility of large loads.


The air supply from the outside is realized through a single stub pipe and expansion boxes that distribute air to individual primary and secondary air intake pipes with integrated dampers.

ADENTE DUO tunnel inserts - the way to family warmth and a beautiful home
The purchase of the ARDENTE DUO fireplace insert is a long-term investment and an opportunity to heat the rooms in an economical and ecological way. These are the most advanced air inserts in the HITZE offer, which, due to their durability and timeless beauty, will allow everyone to gain a wonderful climate in their own home.

Should you have any questions or doubts, please contact HITZE specialists - they will provide professional advice and help you to install the cartridge correctly.

+48 800 880 030

Company data
Stalko spółka z ograniczoną
odpowiedzialnością spółka komandytowa

EU VAT 9482603545
REGON: 361379132
KRS: 0000836475

+48 800 880 030

General questions:

ul. Solec 24/253,
00-403 Warszawa

Gdyńska street 32

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