Rinnai Hot Water Heat Pumps
[Image: Rinnai logo]
Introduction
Hot water heat pumps are rapidly becoming a preferred choice for residential water heating across New Zealand. As more New Zealanders seek smarter, energy-efficient, and climate-friendly ways to power their homes, they recognize that heating water can account for up to 30% of the household electricity bill. Upgrading to a hot water heat pump can reduce this portion by as much as 70%*, leading to significantly lower ongoing energy costs.
Recognized by both EECA (the Energy Efficiency and Conservation Authority) and Consumer NZ, hot water heat pumps represent some of the most cost-effective and efficient methods for heating water in the New Zealand climate. Modern systems are engineered to operate reliably, even in cooler conditions, making them a practical solution throughout Aotearoa.
[Image: Rinnai HydraHeat Integrated outdoor unit shown next to an outdoor living area.]
[Image: Rinnai HydraHeat Split outdoor unit shown mounted on a wall next to a house.]
[Image: Rinnai Enviroflo GR outdoor unit shown next to a house.]
Making the Switch Easier
To support New Zealanders in transitioning to cleaner energy, many local banks now offer green loans or top-up mortgage options. These can help fund upgrades such as heat pump water heating. Additionally, initiatives like the Warmer Kiwi Homes program may provide co-funding for eligible households, further reducing the initial investment required.
Compare Your Options
The comparison table below is designed to help you compare Rinnai Hot Water Heat Pumps, highlighting their differences to assist you in making an informed decision for your water heating requirements. Whether you are upgrading an older cylinder or building a new home, this guide provides helpful information for making an informed, future-proof choice.
Product Comparison Table
| System | Unit | Enviroflo™ GR 215L | Enviroflo™ GR 265L | Enviroflo™ GR 300L | HydraHeat® Integrated 275L | HydraHeat® Integrated 340L | HydraHeat® Split |
|---|---|---|---|---|---|---|---|
| Storage Capacity | Litres | 215 | 265 | 300 | 275 | 340 | Based on cylinder capacity - 180 litre to 340 litre |
| Coefficient of Performance (COP)*** | W/W | 4.0 | 4.1 | 4.1 | 4.7 | 4.7 | 4.6 |
| Hot Water Recovery Rate¹ | L/hr | 66 | 66 | 66 | 89 | 89 | 86 |
| Rated Heat Pump Output | kW | 2.0 | 2.75 | 2.75 | 3.72 | 3.72 | 3.6 |
| Rated Heat Pump Input | kW | 0.5 | 0.68 | 0.68 | 0.80 | 0.80 | 0.80 |
| Element rating | kW | 2.4 | 2.4 | 2.4 | 2.0 | 2.0 | up to 3.0 |
| Operating Temperature | °C | -7°C to 45°C | -7°C to 45°C | -7°C to 45°C | -10°C to 42°C | -10°C to 42°C | -10°C to 42°C |
| Noise Level (Sound Pressure) | dB(A) | 46 | 46 | 46 | 45 | 45 | 48 |
| Refrigerant Type / Mass (g) | R290 / 355 | R290 / 395 | R290 / 395 | R290 / 150 (nominal charge) | R290 / 150 (nominal charge) | R290 / 150 (nominal charge) | |
| People Per Household | 2 to 4 | 2 to 5 | 2 to 6 | 2 to 5 | 2 to 7 | 2 to 7 | |
| Modes of Operation | Standard, Eco, Hybrid, Electric, Vacation | Standard, Eco, Hybrid, Electric, Vacation | Standard, Eco, Hybrid, Electric, Vacation | Standard/Boost/ Eco 50/Eco 55/High Usage / Element Only / Shutdown | Standard/Boost/ Eco 50/Eco 55/High Usage/Element Only / Shutdown | Standard/Eco 55/ Element Only / Shutdown | |
| Detachable Heat Pump Head** | ❌ | ❌ | ❌ | ✔️ (Heat Pump Head Unit Only) | ✔️ (Heat Pump Head Unit Only) | ✔️ (Heat Pump Head Unit Only) | |
| Frost Protection | ❌ | ❌ | ❌ | ✔️ | ✔️ | ✔️ | |
| Back-up Element | ❌ | ❌ | ❌ | ✔️ | ✔️ | ✔️ | |
| Salt Spray Tested | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | |
| Top-Down Heating | ❌ | ❌ | ❌ | ✔️ | ✔️ | ✔️ | |
| Designed & Manufactured in NZ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ | |
| Warranty | 7 years cylinder 3 years heat pump |
7 years cylinder 3 years heat pump |
7 years cylinder 3 years heat pump |
7 years cylinder 5 years heat pump |
7 years cylinder 5 years heat pump |
5 years heat pump |
Notes and Disclaimers
*When the HydraHeat® Integrated or HydraHeat® Split Hot Water Heat Pump is compared with a standard hot water cylinder in Zone 5 (Auckland). Annual energy performance estimated according to AS/NZS 4234:2008 and AS/NZS 5125:2014, medium load size.
**The detachable heat pump head allows for easy servicing and ensures uninterrupted supply of hot water.
Enviroflo™ GR COP: *** Performance when tested to AS/NZS 5125:2014. Coefficient of Performance was measured at the following conditions: Inlet water temperature 19°C, Outlet Water temperature 55°C, Dry Bulb Temperature 19°C.
HydraHeat® Integrated COP and Energy Saving: *When a comparison calculation is made to a 250L standard electric hot water cylinder when heating water from 19°C to 55°C. ***Coefficient of Performance was measured at the following conditions: Inlet water temperature 19°C, Outlet Water temperature 55°C, Dry Bulb Temperature 19°C.
¹ Recovery rate calculated in Eco 55 mode, 19°C ambient air temperature, 19°C inlet water temperature, 36°C temperature rise.
