Fireplace Heat Output Calculator | Calculate Required kW

Calculate the heat requirement for your room below

Room Insulation * Average Poor

Room width (m) *

Room Length (m) *

Room Height (m) *

Room Volume (m3)

Minimum kW requirement to heat the calculated area

Please note: This calculator provides an approximate heat output based on room dimensions and insulation. Factors such as windows, ceiling height, building orientation and the home’s location can affect heating requirements.

Fireplace selection: Choose a fireplace with a nominal heat output that meets or exceeds the calculated requirement. Our fireplace specialists can help you select the right model for your room and home.

Wood burning Freestanding fireplaces:

Heat output required
Up to 8 kW	View 3–8 kW Fireplaces
9–11 kW	View 9–11 kW Fireplaces
12 kW+	View 12 kW+ Fireplaces

Wood burning Built-in fireplaces:

Heat Output required
9–11 kW	View 9–11 kW Fireplaces
12 kW+	View 12 kW+ Fireplaces

Pellet Freestanding fireplaces:

Heat output required
Up to 8 kW	View 3–8 kW Fireplaces
9–11 kW	View 9–11 kW Fireplaces
12 kW+	View 12 kW+ Fireplaces

Wood burning, Pellet, Gas and Bioethanol fireplaces

If you are unsure of the fireplace fuel type you are wanting, simply click on the kw output below to view fireplaces within the range.

2kw, 4kW, 5kW, 6kW, 7kW, 8kW, 9kW, 10kW, 11kW, 12kW, 13kW, 14kW, 15kW, 16kW, 17kW, 18kW, 21kW, 31kW.