5 kWRinnai T Series 5kW Split System
The 5kW Rinnai T Series Split (system HSNRT50B: indoor HINRT50B, outdoor HONRT50B) is sized for living rooms and master suites. As a guide, it cools a room of up to about 36 to 43 m². 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. Western sun, poor insulation and high ceilings bring it down. If the space is bigger or sun-exposed, step up to the 7kW.
Part of the Rinnai T Series Split range, Rinnai's split system line, in 5 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 5 kW options, see every 5kW split system ranked by running cost, or ask about supply and installation.
About $337 a year at the current Sydney median electricity rate: $122 of cooling plus $215 of heating, from the official GEMS test figures.
The Rinnai T Series 5kW uses 368 kWh annually for cooling and 650 kWh annually for heating under official GEMS testing conditions for Sydney's climate zone. These figures form the basis of your running cost estimate, which is calculated using the current Sydney electricity rate and displayed separately on this page.
The system holds a 4-star cooling efficiency rating and 2.5-star heating rating for Sydney. Its rated cooling efficiency (AEER) is 4.04 and heating efficiency (ACOP) is 4.11. The unit uses R32 refrigerant. Your actual energy consumption will vary depending on your usage patterns, local climate conditions and how you operate the system.
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 Rinnai T Series Split range| Brand | Rinnai |
|---|---|
| Model | HINRT50B / HONRT50B |
| Series | Rinnai T Series Split |
| System type | Split System |
| Capacity | 5 kW |
| Refrigerant | R32 |
