Enter the room details for an indicative cooling capacity, then see systems that match.
Enter valid room dimensions to calculate.
A general guide only — final selection must be confirmed by a qualified installer.
Choosing the right air conditioning capacity is mainly about matching the system to the room you want to condition. Room size is important, but ceiling height, insulation quality, glazing and the overall heat load of the space can all affect the cooling requirement.
This guide provides a simple starting point for typical single-room applications. Final suitability should always be confirmed by your installer before ordering, especially for unusual spaces, high ceilings, heavy glazing or open-plan layouts.
Airvana Solutions supplies wall-mounted single split Daikin systems designed to condition one room at a time. Installation and commissioning must be completed by an F-Gas certified installer.
Enter the approximate internal room dimensions in metres, then select the heat load, insulation level and glazing type that best describe your room.
Room dimensions: length, width and ceiling height are used to estimate the room volume, which forms the basis of the capacity calculation.
Heat load: reflects the overall warmth of the room, taking into account factors such as occupancy and heat-generating equipment.
Insulation level: better insulated rooms typically require less cooling capacity. Older properties or rooms with single glazing would generally be classed as poor; modern well-insulated rooms as good.
Direct sunlight: direct sun through south-facing windows or glazing increases the cooling requirement.
Where you are unsure, it is generally better to select the higher option. A system with slightly more capacity than needed will reach temperature more quickly and run more efficiently than one that is undersized for the space.
Some rooms run warmer than others, even if the floor area is similar. The examples below can help you judge which setting best fits your room.
| Heat load | Typical room description |
|---|---|
| Average | Typical bedroom, home office, living room or similar residential space with no unusual heat build-up. |
| Above average | Warmer room with higher occupancy, more lighting or more active devices. |
| High | More demanding space such as a loft room or room with significant internal heat generation from equipment. |
The amount of direct sunlight entering a room has a meaningful effect on how much cooling capacity is required. A room that receives a lot of direct sun will gain heat more quickly than one that is north facing or heavily shaded.
| Direct sunlight | Description |
|---|---|
| None | North, east or west facing room, or windows that are heavily shaded for most of the day. |
| Some | South facing room with standard windows that receive direct sun during the day. |
| A lot | Large south facing windows, bi-fold doors, roof lights, or a conservatory where sunlight enters from a large surface area. |
If a system is too small for the room, it may struggle to maintain a comfortable temperature during warmer periods. A simple area-based assumption can underestimate the capacity required in rooms with higher heat gain — which is why the calculator accounts for room volume, heat load, insulation and glazing together, rather than floor area alone.
The result provides a more informed starting point, but final selection should still be confirmed by your installer before you order.
This calculator is intended as a general guide only. It does not replace site assessment, manufacturer guidance or installer confirmation. Room layout, solar gain, glazing, insulation, ceiling height, occupancy and equipment load can all affect the final requirement.