Quick answer:The Rinnai Enviroflo GR 265L is an integrated heat pump hot water cylinder with R290 refrigerant — $7,499 incl GST fully installed across Auckland by Water & Gas Worx. COP 4.1, 46 dB(A) operation, suits 2-5 people. Price includes supply, installation, old unit removal, electrical connection, and Rinnai warranty registration. Installed by Peter — licensed plumber. Call 0800 322 322.
About the Rinnai Enviroflo 265L
The Rinnai Enviroflo 265L sits at the centre of the heat pump range — 265 litres of capacity at a COP of 3.8, making it the most efficient unit at this price point. A household of two to four people gets both the storage capacity to handle back-to-back morning showers and the energy efficiency to cut the annual hot water bill to $200 to $350. The Enviroflo runs at 43 dBa — noticeably quieter than many competing units, which matters if the installation site is close to living spaces or boundaries.
Rinnai designed the Enviroflo as an all-in-one outdoor unit with an integrated compressor, heat exchanger, and cylinder. There are no indoor components and no refrigerant lines to run between a separate heat pump and tank. This simplicity reduces installation time and eliminates the refrigerant-handling that split systems require. Every installation by Water & Gas Worx includes full plumbing connection, outdoor electrical circuit, condensate drain, and warranty registration with Rinnai NZ.
The Enviroflo 265L is available Auckland wide. For homes replacing a mid-size electric cylinder — typically a 180L or 250L indoor unit — the Enviroflo installed outdoors frees up the internal cupboard completely. Alternatively, if you are building or renovating and want to specify a heat pump hot water system from the start, the Enviroflo is one of the most cost-effective long-term choices available.
Technical Specifications
| Capacity | 265 litres |
| Type | Integrated heat pump |
| COP (coefficient of performance) | 3.8 |
| Noise level | 43 dBa |
| Backup element | 1.8 kW electric |
| Operating range | −5°C to 43°C |
| Warranty | 5-year compressor, 5-year cylinder |
| Refrigerant | R134a |
| Suitable for | 2–4 people |
Why This Unit for Auckland?
- — Installed across Auckland since 2009 — we know these units and the conditions they run in
- — Fixed pricing with no surprises — what we quote is what you pay
- — Licensed plumber and gasfitter — all certification included
- — Same-week installation available in most Auckland suburbs
- — Old unit disconnected, removed, and disposed of — nothing left for you to deal with
Frequently Asked Questions — Rinnai Enviroflo 265L
What is the Rinnai Enviroflo 265L installed price in Auckland?
The Rinnai Enviroflo 265L is $7,499 incl GST fully installed. This includes the unit, old cylinder removal, plumbing connections, outdoor electrical circuit and switch, condensate drain, and warranty registration.
How efficient is the Rinnai Enviroflo 265L?
The Enviroflo has a COP of 3.8 — it produces 3.8 units of heat per unit of electricity consumed. This translates to running costs of approximately $200 to $350 per year for a two to four person Auckland household, compared to $700 to $1,000 for an equivalent standard electric cylinder.
Is the Rinnai Enviroflo 265L quiet?
Yes. At 43 dBa it is one of the quieter heat pump cylinders on the market — similar to a library or quiet office. We recommend installing it at least two metres from bedroom windows, but most Auckland homeowners find this noise level acceptable even in closer positions.
Does the Rinnai Enviroflo work in Auckland winters?
Yes. The Enviroflo operates down to minus 5 degrees Celsius. Auckland winters typically stay above 5 degrees, meaning the unit runs at full efficiency year-round. The 1.8 kW backup electric element activates automatically if ambient temperature drops below the heat pump's range.
How long does a Rinnai Enviroflo 265L installation take?
A standard installation — replacing an existing electric cylinder — takes approximately four to six hours. This covers disconnection and removal of the old unit, outdoor placement of the Enviroflo, plumbing connections back to the hot water distribution, electrical circuit, condensate drain, and testing.
What warranty does the Rinnai Enviroflo 265L carry?
Rinnai provides a 5-year warranty on the compressor and a 5-year warranty on the cylinder. We register the warranty with Rinnai NZ on the day of installation so the clock starts from installation date, not purchase date.
Can I replace a gas cylinder with the Rinnai Enviroflo?
Yes. If you are on a gas storage cylinder and want to switch to heat pump, we cap the gas line, install the Enviroflo outdoors, and connect it to your existing hot water plumbing. We quote the full transition including any gas line work.
