Details

If you're looking for a slim built-in gas fire this may be worth a consideration. The Gazco Onyx Avanti 85 gas fire is the perfect choice for those looking for a slim built-in gas fire with a compact design. This sleek and modern fire features a comprehensive control system that allows for easy ignition, flame adjustment, heat output regulation, and extinguishing. Providing a stunning view of dancing flames and the hand-painted split oak log effect inside the fire. With EchoFlame™ Black Glass Lining, the Avanti creates a truly mesmerizing and realistic fire experience. The included thermostatically controlled remote handset allows you to easily control the flames and adjust the temperature to your liking, ensuring a comfortable and cosy atmosphere in your room.

You can also Enhance your fireplace with the option of different frames for the product. For a minimalist design use the Onyx Avanti 85 gas fire and Edge+ trim or for something more bold the Expression fascia beautifully frames the fire and its flame effect, adding a touch of elegance to your space.

Designed to be installed into a variety of flue options, this product has a wide range when it comes to installation. Sold in 2 sizes, 65 and 85, the Avanti Gas fire is taking the market by storm with its amazing flame effect that is unmissable when you walk into the room. These conventional flue fires are also available as natural gas and LPG models.

Every Onyx Avanti incorporates industry leading technology and design; these premium gas fires are the culmination of over 40 years of experience designing and crafting best-in-class heating products. By choosing the Onyx Avanti, you can be sure you’re getting a premium quality gas fire

Features

  • Heat output: Up to 5.4kW
  • Energy Efficiency Class: D
  • Hand-painted Split Oak Log-effect
  • EchoFlame™ Black Glass Lining
  • High Efficiency: 77.9%
  • Natural Gas and LPG Models
  • Thermostatic Eco remote control
  • Choice of Frame Options
  • Top and Rear Flue Exit
Warranty 7 Year

Additional Specifications

SKU
128-045
Product icon
Estimated 7-10 Day Delivery
Product Image icon
Warranty 7 Year
Colour
Almond Cream
Brand
Onyx
Smart Home Enabled
Yes
Fuel Type
Natural Gas, LPG (Propane)
DEFRA Approved
No
Chimney Type
Brick Chimney (Class 1)
Width
1030mm, 846mm Glass
Height
569mm, 380mm Glass
Depth
331mm, 314mm Inset
Efficiency (%)
77.9
Built From
Steel
Style
Contemporary, Timeless
Colour
Black
Cable Length
1.8m
Heat Output
5kW, 6kW
Parts Warranty
5 Year
Warranty
7 Year
Fuel Bed
Logs, Woodland Logs

Heat Output Estimator

Unsure what size of Stove or Fire you need?

Try our handy Kilowatt Calculator to give you a rough idea what size of appliance you will need for your room.

 
 
 
 

Showroom

StovesAreUs Showroom

Yorkshire Showroom - Open

StovesAreUs, Huddersfield, offers a 2000 sqft showroom of the best in home heating, furniture, outdoor cooking, and electrical appliances, including range cookers and ovens. Please visit our showroom page for details on opening times.

We're not at full capacity in our new showroom just yet, please bare with us, there's more products being added daily. We recommend giving us a call before travelling to ensure we have on display what you're looking for.

Our showroom is conveniently situated in Huddersfield with easy M62 access for visitors travelling from Leeds, Manchester, York and Liverpool. The shop features well-known brands such as RangemasterAGAGazcoKettlerOoni and more with exclusive offers and deals you can only get by visiting our brand-new Huddersfield showroom.

Delivery & Returns

 Free Next Day or Day of Choice Delivery

Orders over £100 (to most UK mainland addresses) qualify for FREE delivery.
Place your order before midday (with in-stock items) for next working day delivery or choose a delivery date that suits you.
Orders under £100 are subject to a £6.95 delivery charge.
Deliveries are made Monday to Friday.
Weekend delivery (Saturday or Sunday) is available at an extra cost – contact us to arrange.

Click & Collect

Would you like your item faster? Use our Free Click & Collect service.
Available on in-stock items from our warehouses.
When placing your order, simply add a note stating your preferred collection date.
If you’re unsure about collection options, just get in touch, we’re here to help.

Delivery - What to Expect

Our standard deliveries arrive via a 10-tonne lorry (similar in size to a bin wagon or fire engine), equipped with a tail lift and pallet truck.
Access must be suitable: solid, level surfaces (no gravel, steps, steep slopes, or grass).
For palletised deliveries the driver will move the pallet to the nearest accessible point, but cannot go over unsuitable terrain or carry goods indoors, though may place them inside a garage if accessible.
If you have narrow gates, restricted access, or other challenges, please let us know in advance so we can make suitable arrangements.
Our free service is a one-man delivery. We recommend having someone available to assist, especially for larger items.
The delivery driver is not able to unpack or install your goods unless this is a service you have selected.

Checking Your Delivery

On delivery of your palletised goods, the driver will wait up to 10 minutes while you inspect the item(s).
Please check your goods before the driver leaves. If there is any damage or the driver refuses to wait, note this on the delivery slip (e.g., “Driver did not wait – damage unchecked”).
For any damage found, mark the delivery note clearly and contact us immediately.

Missed Deliveries

If you miss your pre-booked delivery, a re-delivery charge may apply.
For smaller items sent via courier (e.g., stove glass), the courier will leave a note with redelivery instructions if you’re not home.

Additional Delivery Notes

Accessory items like fitting kits and liner packs may be sent separately via courier on the same day. You’ll receive email confirmation if this is the case.
Delivery times are generally between 9am–6pm, Monday to Friday.
Delivery depots may send SMS updates, but these aren’t guaranteed.

Please DO NOT book installers, plumbers, electricians or other contractors until your goods have been delivered and checked, as delays can sometimes occur beyond our control.

Frequently Asked Questions

How much does delivery cost?

Most of our items come with free standard delivery to mainland UK when you spend over £100, but some larger or more remote deliveries may incur additional charges. You can view your delivery cost by entering your postcode at checkout before completing your order.

Do you deliver to all parts of the UK?

Yes, we deliver across the entire UK, including the Scottish Highlands and Islands, Northern Ireland, and other offshore locations. To check the exact delivery cost to your address, simply enter your postcode at checkout.

Is Click & Collect available?

Yes! We offer Click & Collect on a wide range of our products. Simply call our customer service team to check if your chosen item is eligible. Once your order is ready, we'll notify you with full collection details, including opening hours and what to bring with you.

Do you deliver to the Republic of Ireland (ROI)?

Yes, we do deliver to the Republic of Ireland. Simply select Ireland as your delivery country at the checkout to view shipping options and charges. Please note that delivery times may vary depending on the item, especially for larger or heavier products like stoves and fireplaces.

When will my order be delivered?

We offer a range of delivery options, including next day delivery on many of our products when ordered before the cut-off time. Delivery times for larger or made-to-order items may vary, each product page displays estimated delivery times to give you a good idea of when to expect your goods.

Product Questions

Customer Questions
No Questions

Gazco Onyx Avanti 85 Conventional Flue Gas Fire

In stock

Found it cheaper elsewhere? Then try our Instant Price Beater

Pay in 3 interest-free payments

Estimated 7-10 Day Delivery

Product Options

* Required Fields

- +
Free DeliveryFree Delivery
Free Delivery
30 Days Returns30 Days Returns
30 Days Returns
Secure PaymentsSecure Payments
Secure Payments

Customers Also Bought

Navigating through the elements of the carousel is possible using the tab key. You can skip the carousel or go straight to carousel navigation using the skip links.
Linked product image

All-In-One 10 Metre Stove Flue Pack 5", Gas Liner

£250.00
Linked product image

Smoked Oak Acoustic Wall Panels, 1.2m Length

£89.00
Linked product image

Semi Circle Floor Plate, Smoked Glass

£369.00
Linked product image

Stovax Stove Benches

£420.00 Was £495.00

What Our Customer’s Say

loader
Loading...
loader
Loading...