HydraHeat® Integrated 275L
Rinnai NZ
- 4.7
- COP
- 275 L
- Tank
- 8.3c
- Running Cost/kWh
- 45 dB(A)
- Noise
- R290
- Refrigerant
- —
- Installed from
Who is it a good fit for?
- Buyers who want NZ-designed and built — design and head unit assembly in New Zealand by Rinnai.
- Large households (340L for 5+ people) — 340L tank with ~330L output at 40°C.
- Those who value Rinnai’s NZ heritage and service network — established dealer and installer support.
- Cold climate homes — −10°C operating range covers the coldest NZ locations.
- Buyers who value excellent service networks — the unit is designed for repairability, easily accessed through a long established service network.
- Buyers who prefer physical controls over app-based control — OLED display with 6 modes, no app required.
What owners say
“We wanted to get off gas and needed to do so in a managed way - before our Infinity system broke down. We are very happy with the results. Energy bills are down. Would definitely recommend this system. ”
“I'd been wanting to get off gas forever and this was the last piece in my puzzle. I have a guilt free shower now - my carbon emissions are so much less. I love this smart NZ design for repairability, efficiency through top down heating - you can't hear it from inside.”
“Old water system wasn't sufficient for our needs, attracted by lower energy use of hot water heat pump systems. This was recommended our plumber - it's what they are installing at their own home. Going really well, noticeable drop in our energy use, good pressure, and never run short of hot water needs. It's very quiet, haven't noticed any noise from it.”
Review
Performance & efficiency:
The HydraHeat is Rinnai’s premium offering, designed and built in New Zealand. The 150g R290 charge is the lowest of any unit in the market — minimising refrigerant-related environmental risk. COP of 4.7 tested to AS/NZS 5125 at 19°C ambient is a solid, honestly-rated figure.
Features:
- Recovery rate: The 89 L/hr recovery rate is excellent, and the OLED display with six operating modes gives precise control without needing an app.
- Top down heating: allowing quick reheat of an empty tank.
- Design for repairability: designed in NZ specifically to allow easy replacement of key compressor components.
- Install friendly: the unit comes as a separate tank and compressor unit, which can be attached for ease of install onsite.
- Cold Climate: The −10°C operating range covers even the coldest NZ locations.
The pricing reflects the premium NZ-made positioning - these are the most expensive integrated units on the market, but you’re paying for local design, manufacturing, high performance and Rinnai’s established NZ service network.
Supply and service:
Rinnai New Zealand is the Auckland-based arm of the Japanese Rinnai group and supplies through the mainstream plumbing merchant channel, so the Enviroflo GR and HydraHeat units are widely stocked and readily quoted by installers nationwide. Its after-sales position is the strongest in this category: an authorised service centre network covering fourteen regions across both islands, searchable by product type, with online service booking and a requirement that installation, servicing and repair be carried out only by authorised personnel.
Specs
HydraHeat® Integrated 275LCost & efficiency
- Typical installed price
- —
- COP (rated)
- 4.7
- Test conditions
- Inlet 19°C / Outlet 55°C / Ambient 19°C
- Test standard
- AS/NZS 5125
- Eff. cost/kWh
- 8.3c
- Input power
- 0.8 kW
- Heating capacity
- 3.72 kW
- Household size
- 3–4 people
Hot water performance
- Tank size
- 275 L
- Max temperature
- 60 °C
- Hot water output
- ~270L @ 40°C
- Recovery rate
- 89 L/hr
- Max water pressure
- —
- Tank material
- Enamel
- Tank insulation
- Not provided
- Backup element
- 2kW element
Installation & dimensions
- System type
- Integral (all-in-one)
- Indoor / outdoor
- Primarily outdoor (indoor possible if non-occupied space)
- Min clearance / space
- See installation manual
- Min space required
- No min space listed
- Dimensions (H×W×D mm)
- 1750×692mm (H×Ø)
- Unit weight (empty)
- —
Climate & environment
- Refrigerant
- R290 (GWP 3)
- Operating range
- -10 °C to 42 °C
- Noise
- 45 dB(A)
- Heating capacity
- 3.72 kW
Controls & features
- Display type
- OLED display
- Control modes
- Standard, Boost, Eco 55, Eco 50, High Usage, Element Only
- Smart / Wi-Fi
- No
- Solar PV ready
- Yes
Warranty & support
- Tank warranty
- 7 years cylinder
- Parts & labour warranty
- 5 years heat pump unit; 1 year labour (residential)
- Installer restriction
- Any licensed plumber
- Supplier / brand
- Rinnai NZ