2.6 kWRinnai PB Series 2.6kW Split System
The 2.6kW Rinnai PB Series Split (model HSNRP26B) is sized for standard bedrooms and small home offices. As a guide, it cools a room of up to about 19 to 22 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. It is the smallest capacity in the range. If the space is bigger or sun-exposed, step up to the 3.5kW.
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 2.6 kW options, see every 2.5kW split system ranked by running cost, or ask about supply and installation.
About $140 a year at the current Sydney median electricity rate: $49 of cooling plus $91 of heating, from the official GEMS test figures.
The Rinnai PB Series 2.6kW uses 148 kWh per year for cooling and 276 kWh per year for heating, based on GEMS registration test data for Sydney's climate zone. The system carries a 5.5-star energy rating for cooling and 3.5-star rating for heating under the zoned energy label for Sydney.
Efficiency is measured by AEER (cooling) at 4.98 and ACOP (heating) at 5.27. The unit operates on R32 refrigerant. Your actual running cost depends on your usage patterns and your electricity rate; exact costs 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 Rinnai PB Series Split range| Brand | Rinnai |
|---|---|
| Model | HSNRP26B |
| Series | Rinnai PB Series Split |
| System type | Split System |
| Capacity | 2.6 kW |
| Refrigerant | R32 |
