Opus Calypso G Boiler Stove

The Opus Calypso Glass Door model brings a refined, contemporary aesthetic to one of the most capable woodburning boiler stoves on the market. Combining clean modern lines with a wide glass viewing window, it offers a clear, beautiful view of the flames while delivering powerful, efficient heating for both your room and your home’s hot-water system.

Engineered for performance, the Calypso sends over 60% of its output to water, providing a tested heat spread of 5kW to 11kW with an impressive 84% efficiency. This makes it ideal for meeting the demands of modern, well-insulated homes or for integrating seamlessly with an existing boiler setup.

The Calypso remains the only boiler stove supplied fully pre-plumbed, with pipework, overheat safety valve, manual air vent and pressure relief valve all neatly built in behind the rear panel. This unique design dramatically simplifies installation and reduces time on site.

Suitable for both open-vented and pressurised systems, and fully DEFRA Exempt for clean burning in Smoke Control areas, the Opus Calypso Glass Door model offers elegance, efficiency and practicality in one exceptional package.