3.5 kWRinnai PB Series 3.5kW Split System
The 3.5kW Rinnai PB Series Split (model HSNRP35B) is sized for large bedrooms and smaller living rooms. As a guide, it cools a room of up to about 25 to 29 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 5kW.
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 3.5 kW options, see every 3.5kW split system ranked by running cost, or ask about supply and installation.
About $204 a year at the current Sydney median electricity rate: $72 of cooling plus $132 of heating, from the official GEMS test figures.
The Rinnai PB Series 3.5kW uses 217 kWh per year for cooling and 398 kWh per year for heating under official government test conditions for Sydney's climate zone. These figures are taken from the GEMS energy registration and form the basis of the energy labels displayed on this product.
The system holds a 5-star cooling rating and 3.5-star heating rating under the zoned energy label for Sydney. Its rated cooling efficiency (AEER) is 4.42 and rated heating efficiency (ACOP) is 4.56. The unit operates on R32 refrigerant.
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 | HSNRP35B |
| Series | Rinnai PB Series Split |
| System type | Split System |
| Capacity | 3.5 kW |
| Refrigerant | R32 |
