Rinnai HydraHeat Split Hot Water Heat Pump

Introducing the HydraHeat Split – a flexible and high‑performance solution compatible with both new and existing hot water cylinders. Drawing on Rinnai’s deep expertise in heat pump and water heating technology, the HydraHeat Split provides an exceptionally efficient way to heat water. Its split configuration allows for adaptable installation options while maintaining top performance.

By utilising thermal stratification within the storage cylinder, the HydraHeat® Split delivers hot water instantly and efficiently, making it a smart and practical choice for modern homes.

Up to 75% Energy Savings*

Delivers highly efficient water heating that reduces energy use and lowers running costs. With a high Coefficient of Performance (COP) of 4.6, the HydraHeat® Split maximises heat output while minimising power input, an excellent option for energy‑conscious households seeking reliable, cost‑effective performance.

Faster Top‑Down Heating

Hot water is delivered straight to the top of the cylinder from startup, ensuring instant access whenever needed.

Sustainability Focused

Operates with a 150 g nominal charge of R290 natural refrigerant, supporting environmentally responsible home heating.

Frost Protection

Equipped with built‑in defrost and frost protection functions to perform reliably in cooler climates.

Four Operating Modes

Choose from Eco 55, Standard, Element Only, or Shutdown modes to suit your preferences and seasonal needs.

Smart Timer Function

Programmable scheduling allows heat cycles to align with solar PV generation or off‑peak electricity times, optimising energy use and savings.

Quiet Operation

Engineered for low‑noise performance, ensuring comfort for you and your neighbourhood.

Simple Installation

An outdoor compressor unit efficiently captures ambient air to heat water, ideal for homes with limited indoor space.

Split System Flexibility

The split design integrates easily with your existing cylinder, upgrading your water heating setup without full replacement.

5‑Year Warranty

Includes a five‑year warranty on the heat pump module for peace of mind.

Modern Aesthetic

Finished in a sleek Cod Grey colourway to complement contemporary home designs.

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• For warranty information, please visit our warranty policy page.