5 kWRinnai PB Series 5kW Split System
The 5kW Rinnai PB Series Split (model HSNRP50B) 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 6kW.
Part of the Rinnai PB Series Split range, Rinnai'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 5 kW options, see every 5kW split system ranked by running cost, or ask about supply and installation.
About $345 a year at the current Sydney median electricity rate: $119 of cooling plus $226 of heating, from the official GEMS test figures.
The Rinnai PB Series 5kW is registered with the Australian government's GEMS database for Sydney's climate zone. In cooling mode, it consumes 360 kWh annually and carries a 4-star energy rating. For heating, it uses 683 kWh per year with a 2.5-star rating. These figures reflect typical seasonal use patterns in Sydney and form the basis for calculating your running costs against current electricity rates.
The system's cooling efficiency is rated at 3.90 AEER, while heating efficiency is 4.02 ACOP. Both ratings indicate how much cooling or heating output you receive per unit of electrical energy consumed. The unit operates on R32 refrigerant. Your actual energy use will vary depending on thermostat settings, usage patterns and home insulation.
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 PB Series Split range| Brand | Rinnai |
|---|---|
| Model | HSNRP50B |
| Series | Rinnai PB Series Split |
| System type | Split System |
| Capacity | 5 kW |
| Refrigerant | R32 |
