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Wood Burning

Aquario O Wood Burning Boiler Fireplace Insert – 12kW

  • SKU AQUARIO/O/12/PW/W

£4,562.00 inc VAT

In Stock

Estimated Delivery Date
Order today for delivery between Thursday 30 July - Wednesday 5 August

The Aquario O Wood Burning Boiler Fireplace Insert 12kW is a high efficiency central heating solution designed for both room heating and domestic hot water systems. Featuring a double walled water jacket design and TERMOTEC lined combustion chamber, it delivers powerful heat output with excellent efficiency. Its advanced combustion control system and large ceramic glass viewing panel make it a reliable and modern heating centrepiece.

In Stock

Free Delivery Orders over £300
5 Year Warranty Manufacturer backed
Fast UK Delivery Nationwide fulfilment
Secure Checkout Protected payments

Description

The Aquario O Wood Burning Boiler Fireplace Insert 12kW is a highly efficient central heating solution designed for modern homes that require both powerful room heating and integration with a domestic hot water system. Engineered with a double walled water jacket design, this premium boiler insert captures heat from the combustion process and transfers it directly into a central heating system, delivering outstanding energy efficiency and whole home performance.

At the core of the Aquario O is a high performance combustion chamber lined with TERMOTEC, a heat accumulating material that increases internal temperatures and improves combustion efficiency. This ensures a more complete burn, maximising heat output while extending warmth for longer periods and reducing overall fuel consumption.

A sophisticated double deflector system extends the path of exhaust gases, allowing for improved heat recovery and cleaner combustion. Combined with an advanced afterburning process, the Aquario O reduces harmful emissions and achieves excellent CO₂ performance in line with modern Ecodesign standards, making it an environmentally responsible heating choice.

The integrated dual damper system provides precise control over combustion and flue operation. One damper regulates chimney draft, while the second supports ignition and steady burning, allowing the user to tailor performance across different heating stages with accuracy and ease.

Designed for modern airtight properties, the insert features a built in 125mm external air intake that supplies fresh air directly into the combustion chamber. A carefully engineered air distribution system ensures even burning across the firebox, improving efficiency and maintaining stable combustion conditions throughout operation.

A dedicated air wash system helps keep the large ceramic glass viewing panel cleaner for longer by directing airflow across the glass surface. This not only maintains a clear view of the flames but also enhances combustion quality by supporting more complete fuel burn.

Built with precision engineering, the Aquario O features laser cut steel construction, CNC formed components and reinforced welded joints for long term durability and safety. The ceramic glass front, rated up to 680°C, provides both strength and a wide, elegant flame view suitable for contemporary interiors.

Fully compliant with Ecodesign and BImSchV 2 standards, the Aquario O delivers low emission, high efficiency heating with the added benefit of integration into a full central heating system. It is a powerful and versatile solution for homeowners seeking serious heating performance combined with modern fireplace design.

General data
  • Nominal power (kW) 12
  • Heating power range (kW) 5.0 - 15.0
  • Thermal Efficiency (%) 84
  • Flue gas temperature (oC) 210
  • Max billet length (cm) 55
  • Minimum required active area of inlet grilles (cm2) 210
  • Minimum required active field of outlet grilles (cm2) 105
  • diameter of the flue gas outlet
  • Air intake diameter (mm)
  • COLOUR
  • CLOSING No
  • Materials Steel
Energetic efficiency
  • Energy class A+
  • EEI 110.6
  • Seasonal Energy Efficiency (%) 74
  • Heat output for space heating (kW) 3.5
  • CO emission (at 13% O2) ≤ given in % 0.079
  • CO emission (mg/m3) 986
  • Pollen emission (mg/m3) 13
  • NOx emission (mg/m3) 127
  • OGC emission (mg/m3) 50
  • Flue gas mass flow (g/s)
Certifications / Compliance
  • Certificates Ecodesign, Designed for recuperation, BImSchV 2
Additional information
  • Equipment Air intake - built in , Combustion chamber lining
  • FRONT
  • Fuel type Seasoned deciduous wood (humidity ≤20%)
  • Number of pieces in a package.
  • EAN 5901350065433
Physical parameters
  • Width (cm) 78.4
  • Height (cm) 118.1
  • Depth (cm) 48.2
  • Weight (kg) 275

Warranty

All products sold by Halcyon Fireplaces are brand new and supplied by Halcyon Fireplaces as an authorised retail partner of KRATKI.

Eligible products are supplied with the applicable KRATKI manufacturer warranty, subject to the manufacturer’s official warranty terms and any product-specific exclusions.

KRATKI provides:

  • A 5-year manufacturer warranty covering the proper functioning of the fireplace or stove from the date of purchase.
  • A 1-year manufacturer warranty covering fireplace grates and seals.

The manufacturer warranty does not cover heat-resistant ceramics, including fireplace glass, except where otherwise stated in the applicable warranty terms.

To maintain the validity of the manufacturer warranty, the appliance must be installed, operated and maintained in accordance with the manufacturer’s instructions and all applicable UK building, ventilation and chimney regulations.

Halcyon Fireplaces will assist customers with valid warranty claims and, where appropriate, liaise with KRATKI on the customer’s behalf.

The manufacturer warranty is provided in addition to, and does not affect, your statutory rights under UK consumer law.

Returns and Refunds

At Halcyon Fireplaces, we want you to be satisfied with your purchase. Due to the size, weight and specialist nature of fireplaces, returns must be handled carefully.

To request a return, please contact us within 30 days of delivery.

For online consumer orders, your statutory cancellation rights include the right to notify us that you wish to cancel within 14 days of receiving the goods. You then have a further 14 days to return the goods.

Returned items must be kept in good condition and, where reasonably possible, returned with their original packaging, pallet and protective materials.

Fireplaces that have been installed, connected, used or damaged after delivery may not be eligible for a change-of-mind return. This does not affect your rights where goods are faulty, damaged on arrival, incorrectly supplied or not as described.

Halcyon Fireplaces can arrange collection from your property at a pre-agreed date. The cost of collecting a non-faulty change-of-mind return will be confirmed before collection and may be deducted from the refund where permitted by law.

No collection charge or restocking charge will apply where goods are faulty, damaged on arrival, incorrectly supplied or not as described.

Where returned goods show handling beyond what would reasonably be permitted when examining them in a shop, we may make a lawful deduction for any reduction in value.

Refunds

Refunds will be processed after the returned goods have been received or collected and inspected.

Refunds will be made to the original payment method.

Where the statutory cancellation right applies, refunds will be issued within 14 days of receiving the returned goods or receiving acceptable evidence that the goods have been returned.

Where applicable, the original standard delivery charge will also be refunded. Additional charges paid for an enhanced or expedited delivery service are not refundable beyond the cost of standard delivery.

Banks and card providers may take additional time to display the refunded amount.

Important Notes

Fireplaces are heavy and are often delivered on pallets. For safety and to reduce the risk of damage, we recommend using the collection service arranged by Halcyon Fireplaces.

Any collection cost or deduction will be explained clearly before the return is completed.

Nothing in this policy limits or excludes your statutory rights.

FREE standard UK delivery is available on orders over £300. Orders below £300 are charged £10.

Most fireplaces are delivered on a pallet using a kerbside delivery service. The driver will unload the order to the nearest safe and accessible point outside the property but cannot move the fireplace inside.

Most orders are dispatched within 3–5 working days unless a different lead time is shown on the product page. Deliveries are normally made Monday to Friday between 9:00am and 5:00pm.

Please make sure there is suitable vehicle access and that someone is available to accept the delivery. Additional charges may apply for missed deliveries, unsuitable access or late changes to delivery arrangements.

Smaller items and accessories may be sent separately by Royal Mail, Parcelforce or another suitable courier.

For full delivery terms, access requirements and important information, please visit:

https://halcyonfireplaces.co.uk/delivery-information/

Nothing in this information affects your statutory consumer rights.

Why Shop With Us

Why Choose Halcyon Fireplaces?

Genuine KRATKI Products

Authentic fireplaces and accessories supplied through an authorised KRATKI Retail Partner.

UK-Based Business

Based in Hertfordshire with knowledgeable UK customer and technical support.

Secure Payments

Shop confidently using trusted and encrypted payment methods.

Fast UK Delivery

Reliable nationwide delivery with clear updates throughout your order.