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What Size Heater Do I Need?

Use our simple calculator below to find your ideal heating solution.

1. ROOM INFORMATION

v1.0
Room Type:
? Room Type Selection (Required)
Selecting the Room Type is important because each room type has values assigned to them which we use within the calculation.
Room Temperature Required:
? Room Temperature
We have set a default room temperature of 21°C. However, you have the option to change this set temperature, higher or lower if you want. This temperature setting represents the temperature you want the heater to maintain in the room.
Room Ceiling Height:
? Room Ceiling Height
We have set a default ceiling height of 2.4 meters. If the room ceiling height is higher or lower than this, then this value should be changed to reflect your actual rooms ceiling height to the closest value.
Room Length (Mtrs):
? Room Length (Required)
The Room Length is a required input and should be the room length measured in meters. For example, a room length of 428cm should be entered as 4.28 in this box.
Room Width (Mtrs):
? Room Width (Required)
The Room Width is a required input and should be the room width measured in meters. For example, a room width of 365cm should be entered as 3.65 in this box.

2. WINDOW INFORMATION

Window Type:
? Window Type (Required)
To give the best heat loss calculation we need to know if the room has any windows. If they are single, double, or triple glazed, and the overall size of the window/s. The measurement of the window is again in meters. If there is more than one window in the room then the total area of all the windows should be entered. If there are no windows in the room then select 'No Windows' and leave the Length and Width set to '0'.
Window Height (Mtrs):
? Window Length (Required)
The Window Length is only required if your are selecting Single, Double, or Triple Glazing Window Type. If 'No Windows' has been selected for Window Type then you can leave the '0' value for the Window Length. Otherwise you will need to enter the length of the window or total length of the windows in the room.
Window Width (Mtrs):
? Window Width (Required)
The Window Width is only required if you are selecting Single, Double, or Triple Glazing Window Type. If 'No Windows' has been selected for Window Type then you can leave the '0' value for the Window Width. Otherwise you will need to enter the width of the window or total width of the windows in the room.

3. EXTERNAL WALL INFORMATION

Wall Contruction Type:
? Wall Contruction Type (Required)
It's important for us to know the construction of the property to allow us to select the correct values to the heat loss calculation. Selecting a different Wall Contruction Type can effect the results widely. There are many different option for this, however, we have limited these options to just four to try and make the selection easier. If you are not sure if your walls have insulation or not then we would suggest selecting 'Brick / Cavity / Brick'.
Total External Wall Length (Mtrs):
? Total Wall Length
This is the total length in meters of external walls to the room. For example if one wall is 4.28mtrs and one wall is 3.65mtrs and both walls are external walls then the total length of external walls is 4.28 + 3.65 = 7.93mtrs. So you should enter '7.93' in this box. If there are no external wall for the room then this figure can be left as '0'.

4. HEATER TYPE REQUIRED FOR ROOM

Choose a type of heater:
? Type of Heater (Required)
Below is a selection of heater types for you to choose from. Simply click on the 'SELECT' button for the type of heater you want to use in the calculation.

HHR - HIGH HEAT RETENTION STORAGE HEATERS

SSH - ENERGY EFFICIENT SMART STORAGE HEATERS

Please note: This tool has been designed as a guide to help you choose the correct size of heater for your room. Several default values have been used in creating this calculator and should be used as a guide only.

ROOM RESULTS

Room Type:
Required Temperature:
Room Volume:
Heat Loss (Watts):
Heat Loss (Kwh):
Below is a selection of suggested heater options you could use to heat this space :
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