Air Conditioning Calculator & Size Guide

All information and tools provided by AirConditioning-online.com.au on our website is a guide to assist you. It does not, and is not intended, to replace the advice of a qualified HVAC engineer. Please use the following information and tools in good faith in preparation to speaking to a qualified engineer.

Location Dimensions

(in Metres) (Note: 1 Metre = 3.28 Feet)

Total Volume

A.C. Required (for 0.00 M3)

Air Conditioning Sizing Chart

A Class

B Class
Insulated roof space, walls and sub floor, full brick or brick veneer construction, average size windows with awnings, full shading south facing aspect, temperate weather conditions. Insulated roof space, full brick or brick veneer construction, average size windows with internal shades, north facing aspect, temperate climate.

C Class

D Class
Insulated roof space, full brick or brick veneer construction, average size windows with internal shades, east facing aspect or sub tropical climate. Little or no insulation, weatherboard, fibro or brick veneer construction, large windows, no shading from the sun westerly facing aspect.
Air Conditioner Capacity Room Class
A B C D
Maximum Floor Area (m2)
1.7kW Cooling 17 14 12 10
Heating 20 17 15 12
2.0kW Cooling 20 16 14 12
Heating 27 23 20 16
2.5kW Cooling 25 21 18 15
Heating 34 28 24 20
3.5kW Cooling 35 29 25 21
Heating 40 33 29 24
5.0kW Cooling 51 43 36 30
Heating 58 48 41 34
6.0kW Cooling 60 50 45 37
Heating 68 57 48 39
7.1kW Cooling 71 59 51 42
Heating 80 67 57 47
8.0kW Cooling 80 67 57 47
Heating 89 73 64 52
9.5kW Cooling 95 78 68 57
Heating 105 87 76 60
10.0kW Cooling 100 83 73 62
Heating 110 92 81 68
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