Australia

What size ethanol fireplace do you need? A room size guide

Work out your room volume, check it against each burner's minimum, then match the heat output to how you will use the fire.

Richard Lee·Updated 12 November 2026
Naked Flame Curve 120 suspended fire in a large living room

Size an ethanol fireplace by room volume first, then heat. Multiply the room's length by width by height to get cubic metres, check it meets the burner's minimum (80 m³ for the Sphere, 90 m³ for the Curve 90, Orbit, Silo and Iconic 900, 110 m³ for the Curve 120), then pick the heat output that suits how you will use the fire.

Step 1: work out the room volume

Length x width x height. A living area 8 m long, 5 m wide and 2.7 m high is 108 m³. In open-plan homes, measure the connected space that shares the air.

Step 2: check the minimum for each burner

Fire Heat Minimum room
Naked Flame Sphere 3.35 kW 80 m³
Curve 90, Orbit, Silo 4 kW 90 m³
Iconic 900 5.5 kW 90 m³
Curve 120 4.4 kW 110 m³
Cocoon Aeris 3 kW see manual

Step 3: match heat to how you will use it

  • Atmosphere and cool evenings, common in Brisbane, the Gold Coast and Sydney: 3 to 4 kW is usually plenty.
  • Real warmth in a cold winter, as in Melbourne and the hills: look at 4.4 to 5.5 kW, alongside your main heating in large spaces.

Step 4: ceiling height and fitting

Measure floor to ceiling where the fire will hang, and the pitch if the ceiling is raked. We confirm the fitting and flue length for you.

Send your measurements to info@nakedflamefires.co.nz and we will recommend a burner. See the full Australian range.

NOT SURE WHICH ONE

Talk to the team.

Tell us about the room, the ceiling and where you are in the world, and we will tell you which fire fits.