3.5 kWCarrier Indigo 3.5kW Split System
The 3.5 kW Carrier Indigo Split System cools a room of up to about 25 to 29 square metres as a guide. That is from Mitsubishi Heavy Industries' sizing chart for an insulated room: the larger figure if it faces north, the smaller if it faces east. Sun exposure, ceiling height and insulation move those figures, which is why we confirm sizing before we quote.
Part of the Carrier Indigo Split System range, Carrier's split system line, in 6 sizes. Running costs below use the Sydney median rate; the Eastern Suburbs and Western Sydney pages cost systems on their own network tariffs. Check the size against your rooms, compare it with other 3.5 kW options, see every 3.5kW split system ranked by running cost, or ask about supply and installation.
About $209 a year at the current Sydney median electricity rate: $73 of cooling plus $136 of heating, from the official GEMS test figures.
The Carrier Indigo 3.5kW uses 219 kWh per year for cooling and 411 kWh per year for heating, based on official government test data for Sydney's climate zone. These figures represent standard test conditions and will vary depending on how you use the system. The unit carries a 5-star energy rating for cooling and a 3-star rating for heating under the zoned label for Sydney.
The system achieves a rated cooling efficiency (AEER) of 4.42 and heating efficiency (ACOP) of 4.50. It uses R32 refrigerant. Your running costs depend on your local electricity rate and usage patterns, which are shown separately on this page.
Source: Australian GEMS registry · median of 170 Sydney residential tariffs, including GST · Refreshed monthly · Last updated October 2026
Specifications
From the manufacturer’s published range data. We confirm the exact configuration when we quote.
About the Carrier Indigo Split System range| Brand | Carrier |
|---|---|
| Model | 42QAG035N8 / 38QAG035N8 |
| Series | Carrier Indigo Split System |
| System type | Split System |
| Capacity | 3.5 kW |
