Description

The Onyx Athos 5 Wood Burning Stove brings together the look of a classic stove with modern performance you can rely on. It’s solid and well-built, with a steel body and cast iron door that feel like they’ll last for years, and the big glass window means you get a great view of the fire inside. The Airwash system keeps the glass cleaner for longer, so you don’t have to keep wiping it, which is a nice little touch.

This wood-burning stove is designed to give you good heat without wasting fuel. It puts out around 4.8–5kW and hits efficiency up to 82%, so it’s warm and economical at the same time. It’s DEFRA-exempt too, which means you can use it in Smoke Control Areas without worrying, and the Cleanburn system makes sure it’s not belching out unnecessary smoke. The convector system spreads the heat around the room, and the single air control lever is easy to figure out, so you’re in charge of how the fire burns.

The little details make this Onyx stove feel special. The door handle has a nice knurled grip with subtle champagne ends, and the proportions are just right for a traditional look without feeling dated. It can go on a 12mm hearth and can even take an external air supply if you need it. All in all, it’s a stove that looks fantastic, heats your home really well, and gives you that cozy, real-fire vibe.

Features

Classic stove design with modern, reliable performance
Robust steel body and cast iron door for long-lasting durability
Large glass window with Airwash system for a clear view of the fire
Nominal heat output of 4.8–5kW with up to 82% efficiency
DEFRA-exempt and Cleanburn technology for eco-friendly, low-emission heating
Convector system for even heat distribution and single air control lever for easy adjustment
Stylish door handle with knurled grip and champagne accents
Compatible with 12mm hearth and optional external air supply

Dimensions & Specs

SKU	728-050
Product Image icon	Warranty 10 Year
Brand	Gazco
Fuel Type	Wood Burning
DEFRA Approved	Yes
Chimney Type	Brick Chimney (Class 1)
Flue Options	128mm (5″)
Width	512mm
Height	596mm
Depth	367mm
Efficiency (%)	82%
Built From	Cast Iron, Steel
Style	Timeless, Traditional
Colour	Black
Energy Rating	A+
12mm Hearth Installation	Yes
Heat Output	5kW
Warranty	10 Year

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.

Delivery Info

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.