Consumer Calculator - What size heat pump do you need?

Your heating needs depend on many factors, including the level of insulation, the area to be heated, the window area and the climate. Our calculator allows you to estimate the heat loss from a room and the capacity of the heater needed to maintain a comfortable temperature.

This guide will give you a good indication as to what size pump you require. Please contact us to discuss this further to ensure you get the correct air conditioning unit for your requirement.

Step 1
Calculate the area of the room in square metres, as required in the list below. Fill in the relevant boxes.

  Area
(m²)		 X Heat Loss
Factor		   Watts
Ceiling to insulated roof: 
 (or unheated room above)  		X 20 =
Ceiling to un-insulated roof:  X 40 =
External walls - insulated:  X 10 =
External walls - un-insulated:  X 26 =
Internal walls to heated rooms:  X 0 =
Internals walls to unheated rooms:  X 16 =
Windows with double glazing or full-length curtains:  X 40 =
Other windows:  X 80 =
Floor slab on ground:  X 10 =
Floor - timber above open space or unheated room:  X 20 =
Total estimated heat loss for the room:         
50% loading to allow fast warm-up and compensate for  
draughts and the like:  		  + 50%  
Divide the total watts by 1000 to get the kW output of the electric heater or heat pump needed for the size of the room   ÷ 1000  
This figure is the capacity needed to maintain a temperature difference of about 12°C between indoors and outdoors. In colder climates you may need a larger capacity. These calculations do not apply to ducted systems.

 

*  This has been adapted from CSIRO Building Construction and Engineering (Australia) Publication "Room heaters and coolers - choosing the best size" 1977.

Please contact us to discuss your Air Conditioning needs, alternatively for a free no obligation quote you can fill in the quote form and we will be in touch.
 

  

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