The Onyx Avanti 65 Balanced Flue Gas Fire reimagines contemporary living with the perfect blend of sophisticated styling, remarkable flame realism, and class-leading efficiency. Crafted by the experts at the Stovax Heating Group, a name trusted for over 40 years of fireplace innovation, this inset gas fire delivers the natural beauty of a log fire — with all the convenience of clean, balanced flue technology.

Designed for homes without a traditional chimney, the Avanti 65 offers effortless installation flexibility while maintaining the premium build and lifelike flame performance that define the Onyx collection. It’s more than just a heat source — it’s a centrepiece of comfort, craftsmanship, and modern design.

A Contemporary Statement Piece

From minimalist media walls to timeless living spaces, the Avanti 65 has been designed to look extraordinary in every setting. Its panoramic landscape display creates a wide, cinematic view of dancing flames and glowing embers, enclosed by crisp architectural lines that suit both traditional and contemporary interiors.

Choose the Edge+ frame for a refined, flush appearance or the Expression frame for a bold designer finish. For those seeking pure minimalism, the Avanti 65 can even be installed completely frameless, achieving a seamless integration within your wall for a truly modern aesthetic. The non-reflective glass ensures a crystal-clear flame picture free from glare, allowing you to enjoy uninterrupted ambience at any time of day.

Designed for Homes Without a Chimney

Engineered to provide beautiful, efficient flames without the need for a chimney, the Avanti 65 offers versatile installation solutions for a wide range of home layouts:

• The Top Exit Up & Out Kit is ideal for exterior walls, allowing the flue to rise from the fire before turning horizontally to vent safely outdoors.
• The Top Exit Vertical Kit suits single-storey extensions or open-plan areas where the flue exits straight through the roof.
• The Chimney Renovation Kit makes it possible to install into an existing fireplace opening while utilising a masonry chimney for air intake and flueing.

Whichever method you choose, the balanced flue design draws air from outside and vents combustion gases safely, ensuring clean performance, easy installation, and no requirement for a traditional flue or additional ventilation.

Lifelike Flame Picture

At the heart of the Avanti 65 is an advanced multi jet burner designed to replicate the rhythm and character of a real log fire. Hand finished split oak logs are carefully arranged over a glowing ember bed, while rich, wrap around flames flicker and weave naturally between them. The addition of the EchoFlame™ Black Glass lining reflects the flames within the chamber, multiplying their depth and intensity for a striking three dimensional effect. The result is a fire that looks and feels alive, delivering authentic visual warmth that rivals the real thing.

Performance That Delivers Warmth and Efficiency

With a 4.7kW heat output and an impressive efficiency rating of up to 89.1%, the Onyx Avanti 65 provides powerful, economical heating for medium to large living spaces. The balanced flue system ensures that combustion air is drawn externally, maximising safety and maintaining consistent efficiency without requiring additional ventilation. This means you can enjoy a warm, inviting room while keeping running costs under control.

Convenience at Your Fingertips

Control the atmosphere effortlessly with the Avanti 65’s fully sequential thermostatic remote control. From ignition to flame height and room temperature, every function is available at the touch of a button. Whether you want instant warmth or a gentle glow to complement your evening, the intelligent control system makes it easy to tailor the experience to your comfort.

Smart Engineering for Simple Installation and Service

Every detail of the Avanti 65 has been designed for practical use as well as visual impact. The compact integrated control system combines key components to streamline fitting and maintenance, while the direct frame attachment system simplifies wall installation with minimal finishing required. Ergonomic glass handles allow the front panel to be safely removed for cleaning or servicing, and the fire’s reduced minimum flue height of just 1.5 metres makes it suitable for a wide variety of property types, even single storey homes.

Built to Last, Designed to Impress

From its durable construction to its flawless visual finish, the Onyx Avanti 65 Balanced Flue Gas Fire embodies premium British design and engineering excellence. Each unit is supplied with non reflective glass as standard and is backed by a 10 year extended warranty (upon registration), ensuring years of performance, peace of mind, and luxurious warmth.

Key Features & Benefits

• Modern landscape balanced flue gas fire – perfect for contemporary interiors
• Choice of finishes: Edge+ or Expression frame, or frameless installation
• Realistic hand painted split oak log set with glowing ember bed
• EchoFlame™ Black Glass lining enhances flame depth and reflection
• Powerful 4.7kW heat output – ideal for medium to large spaces
• Up to 89.1% efficiency for cost effective heating
• Fully sequential thermostatic remote control for effortless operation
• Non reflective glass ensures crystal clear flame visuals
• Top Exit Up & Out or Vertical kits for flexible flue installation
• Optional Chimney Renovation Kit for traditional fireplace openings
• Compact integrated control system for simplified installation and servicing
• Reduced flue height requirement – only 1.5m
• Ergonomic glass panel handles for safe access
• No additional ventilation needed in most installations
• Built by Stovax Heating Group – over 40 years of design expertise

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