Start with how you will use it
Size cooling capacity for room dimensions, sun exposure, occupants and heat sources. Inverter technology can be used in different AC formats, so compare both installation type and compressor control. Ask for a total installed quotation including piping, bracket, drainage and electrical work.
Types, advantages and trade-offs
| Type | Best suited to | Advantages | Limitations / costs |
|---|---|---|---|
| Window | Compact rooms with a suitable opening | Often lower purchase and installation cost | More sound near the room; opening and support required |
| Split | Bedrooms and living spaces | Quiet indoor operation; flexible wall placement | Outdoor space, piping and professional installation needed |
| Cassette | Large spaces with suitable ceilings | Distributes air in several directions | Higher installation and access costs; ceiling space required |
| Inverter option | Long or variable daily use | Can adjust output as demand changes | Compare efficiency labels and electronics service costs; savings depend on use |
Compare the full cost, not just the sticker
Obtain current written quotations for models of the same size or capacity. Purchase prices vary by model, seller, offer and location; the table uses relative cost factors instead of presenting an unverified price list. Ask whether delivery, installation, necessary accessories and removal of an old appliance are included.
| Cost to compare | What to ask |
|---|---|
| Purchase | What is the exact model and final billed price? |
| Setup | Are installation, brackets, hoses, plumbing or electrical changes additional? |
| Running | What do the current efficiency label and your expected use suggest? |
| Maintenance | Which owner-care tasks and consumables are needed? |
| Repairability | Are model-specific parts and independent support accessible locally? |
Compare efficiency labels for similar capacities and the same applicable label period. A star rating applies to a specific model; it is not a blanket rating of a brand. Actual consumption depends on conditions and use.
Further reading: Bureau of Energy Efficiency: Standards & Labelling. Compare current model labels and manufacturer specifications before purchase. This guide does not quote live retail prices.
Repair or replace?
If you already own an appliance, ask for a diagnosis and complete repair estimate first. Consider its age, condition, safety, component availability and expected use. A small repair and a major panel, compressor or assembly replacement have very different economics. There is no single percentage rule that makes the decision right for every household.
Write down the repair amount, any written work terms and the installed price of a suitable replacement. Check whether the new model will actually solve your space, capacity or usage problem before spending more.
A short decision checklist
- Measure the installation space and delivery route.
- List your normal daily use and essential functions.
- Compare at least two suitable models on total installed cost.
- Read energy labels, warranty terms and service access information.
- Keep a copy of the final model number and quotation.