Measuring Your Home for the Right Sized Heater this Winter!

room measurements for heating
By measuring your home, you will be able to find which kilowatt (kW) heater is best for your home. You will also need to consider things like insulation, flooring, window coverings and ceiling heights.

It is important to note that while the 10 watts per square foot rule of thumb is a good starting point for selecting a heater, other factors should also be considered when choosing the appropriate size and type of heater for a specific room or area. These factors may include the type of insulation in the walls and ceiling, the number of windows and doors in the space, and the climate and average temperatures in the region.

It is generally recommended to have 10 watts of heating power for every square foot of floor area in a room. This is important to consider when selecting a heater to ensure that it is appropriate for the size of the space.

What you will need to do is get a measuring tape and measure the length and width of each room you want to be heated.  Multiply the length and width of each room individually, giving you the area in square metres.

To find out how many squares there are you will need to divide the total square feet by 9.29.  For example, say your total square metres is 100, then you would divide 100 by 9.29, just like this:

10/9.29 = 10.76 Square
1 x square feet = 1 x Kilowatts
1 kW = 3412.142 BTU/hr

Area To Be Heated \ Cooled (square feet)

Capacity Needed (BTUs per hour)

100 to 150


150 to 250


250 to 300


300 to 350


350 to 400


400 to 450


450 to 550


550 to 700


700 to 1,000


1,000 to 1,200


1,200 to 1,400


1,400 to 1,500


1,500 to 2,000


2,000 to 2,500


For any further questions or advice, please give one of our Tucker stores a call today
Silverwater Store: (02) 9748 8368
Mona Vale Store:  (02) 9999 1891
Taren Point Store:  (02) 9526 1526