Opus Calypso G boiler stove with its full-height glass door, lit in a dining room

Opus Calypso G Wood Burning Boiler Stove with Glass Door

Calypso G
£3,830.00
Skip to product information
Opus Calypso G boiler stove with its full-height glass door, lit in a dining room
  • Opus Calypso G boiler stove with its full-height glass door, lit in a dining room
Opus Calypso G Wood Burning Boiler Stove with Glass Door

Opus

Opus Calypso G Wood Burning Boiler Stove with Glass Door

Customers rate us 4.9 out of 5 (103 reviews)
£3,830.00
Free delivery to England and Wales on orders over £50.
Model

This is a boiler stove

Most of its heat goes into your radiators and hot water. It connects to your central heating, so you need a heating engineer as well as a stove installer.

Just want to heat a room? See room heater stoves

Is it right for you?

  • Chimney: works with a lined chimney, or a twin-wall flue if you don't have one.
  • Fuel: dry logs only.
  • Smoke control: exempt, so you can burn logs in a smoke control area.
  • Fitting: must be fitted by a HETAS registered installer, plus a heating engineer for the pipework. Find one by postcode
What else will I need?
Free delivery to England and WalesUsually 3 to 10 working days. The courier usually contacts you to book a day. Scotland and Northern Ireland charges are shown at checkout.
Questions before you buy? Ask us on WhatsApp
  • 30 days to change your mind
  • Manufacturer's UK warranty
  • UK suppliers
  • 8.3kWHeat output
  • Wood BurningFuel
  • Ecodesign2022 compliant
  • Smoke controlExempt appliance
  • 83.9%Efficiency
  • 3 yearsWarranty

The Opus Calypso G is the glass door version of Opus's Calypso boiler stove. It gives 8.3kW in total, 3.4kW to the room and 4.9kW to water for hot water and radiators, at 83.9% efficiency. The Calypso G SE is exempt for use in smoke control areas in England when burning approved fuel.

Why choose the Opus Calypso G

  • Full-height glass door for a clear view of the fire.
  • 8.3kW nominal: 3.4kW to the room and 4.9kW to water, at 83.9% efficiency; Ecodesign ready.
  • Supplied pre-plumbed, with the overheat safety valve, air vent and pressure relief valve behind the rear panel.
  • Suits open-vented and pressurised heating systems.
  • SE version exempt in England for smoke control areas on wood logs.
Full details and specifications

What you'll need

Everything to get this stove lit

A stove on its own isn't enough. Here's what comes in the box, what else you'll need, and what your installer brings.

In the box

  • The stove and the manufacturer's installation and user manual

You'll also need

  • A carbon monoxide alarm. Required by law in the room with the stove.
  • Stove pipe to connect it to the flue. Your installer will tell you the length.
  • A hearth for it to stand on, if you don't already have one.
  • A load unit for the heating circuit, fitted by your heating engineer.
  • A chimney liner or twin-wall flue. Your installer supplies this.

Your installer brings

A stainless steel liner sized to the stove and a register plate to seal the chimney, usually after the chimney has been swept and checked.

Fitting, testing and a certificate showing it meets Building Regulations. Keep it for your home insurer and for when you sell.

A boiler stove also needs a heating engineer to connect it to your radiators and hot water, with the safety parts the stove's manual lists.

Ask for one quote that covers the survey, flue, fitting and certificate. Using someone who isn't HETAS registered? Your local building control must approve the work before you use the stove.

Find a HETAS installer by postcode Got your installer's parts list? Email it and we'll price what we sell How flues and installation work

How buying a stove works

  1. Check it fitsUse our size calculator, or email us a photo of your fireplace and the room size and we'll suggest stoves that suit.
  2. Book a HETAS installerThey survey the chimney, quote for the flue and fitting, and tell you which parts to order.
  3. We deliverFree to England and Wales, usually within 3 to 10 working days. Book the fitting date once it has arrived.
  4. Your installer fits itThey fit the stove and CO alarm, test it and register it. You get a certificate to keep.

The numbers, in plain English

83.9% efficient
How much of the fuel's heat it turns into useful heat
150mm flue
The flue size your installer needs
Smoke control exempt
Legal to burn logs in a smoke control area
33cm logs
The longest log it takes
H 1166 x W 565 x D 462 mm
Size (height x width x depth)

Full specifications, clearances and the manual are further down the page.

About this product

Will it suit your space?

With only 3.4kW going into the room, the Calypso suits well-insulated homes; Opus says it should cover a good share of the heat and hot water in a well-insulated small to medium house. Your installer's heat-loss check will confirm the size.

It stands 1166mm tall, 565mm wide and 462mm deep, takes a 150mm top flue, and needs 150mm to combustible materials behind and 200mm at the sides.

Specifications

Model Opus Calypso G / Calypso G SE
Heat output 8.3kW nominal (3.4kW to the room, 4.9kW to water)
Efficiency 83.9%, energy class A+
Fuel Wood logs only, up to 330mm long
Dimensions H 1166 x W 565 x D 462mm
Flue 150mm, top outlet only (centre 196mm from the back)
Water system Supplied pre-plumbed; open-vented or pressurised systems
Clearance to combustibles 150mm rear, 200mm sides
Ecodesign Ecodesign ready
Smoke control Calypso G SE exempt in England on wood logs; Calypso G not exempt
Warranty 3 years (1 year without a load unit or load valve)

Installation and safety

Have it fitted by a HETAS-registered installer or signed off by Building Control, with a carbon monoxide alarm in the same room.

A competent installer must connect the water side. Opus cuts its warranty to 1 year on boiler models without a load unit or load valve, so include one.

Questions

Can I use it in a smoke control area?

Only the Calypso G SE. DEFRA lists the Opus Calypso Boiler Stove as exempt in England for wood logs when fitted with a permanent secondary air stop, which is the SE version. The Calypso G is not exempt.

Does it work with a pressurised heating system?

Yes. It suits both open-vented and pressurised systems.

How is it different from the standard Calypso?

The G has a full-height glass door. Output, efficiency and size are the same.

See more boiler stoves, Opus stoves and DEFRA approved stoves, or the standard Opus Calypso.

You may also like

More from Boiler Stoves

Shop all

Why buy from Glowing Flames?

  • Free delivery

    Free to England and Wales on orders over £50 (£9.99 below that). Large items come on a pallet and the courier books a day with you.

  • Real advice

    Not sure it will fit or work with your chimney? Send us a photo and we will check.

  • UK warranties

    Supplied by the manufacturer or its UK distributor, with the manufacturer’s UK warranty and spares.

  • 30 days to change your mind

    Change your mind up to 30 days after delivery, with no restocking fees and fixed collection prices for large items.