Rinnai Enviroflo 315L Heat Pump Review: Is It Worth It?

The Rinnai Enviroflo V2 315L heat pump is a large-capacity heat pump hot water system for households that want more stored hot water than a medium 200L–280L heat pump, while still aiming for lower electricity use than a standard electric storage tank.

For customers comparing products online, the Rinnai Enviroflo V2 315L Heat Pump Hot Water System sits in Installed Today’s Large Heat Pump Hot Water Systems range as a high-capacity option for larger households, higher-use homes and customers replacing older 315L electric hot water systems.

It is not the smallest, cheapest or quietest hot water option. It also has more installation requirements than a standard electric storage tank. However, when the home has the right outdoor space, airflow, drainage, electrical supply and hot water demand, the Rinnai Enviroflo 315L can be a strong upgrade option.

Quick Answer

Best for: larger households wanting an efficient electric hot water upgrade

Typical household fit: larger families or higher-use homes, depending on shower habits and daily demand

Main advantage: 315L storage capacity with heat pump efficiency

Best replacement use: homes upgrading from a larger electric storage hot water system

Noise level: listed at 48 dB(A), so placement matters

Electrical requirement: suitable 15 amp electrical setup required

Best categories to compare: Heat Pump Hot Water Systems, Large Heat Pump Hot Water Systems and Rinnai Hot Water Systems

What Is the Rinnai Enviroflo V2 315L Heat Pump?

The Rinnai Enviroflo V2 315L is an integrated heat pump hot water system. Instead of relying only on direct electric element heating, it uses heat from the surrounding air to help heat the stored water.

This makes it different from a standard electric storage system. A regular electric storage tank uses an element to heat water directly. A heat pump uses a refrigeration cycle to move heat from the air into the water, with an electric element used for backup or extra recovery when required.

The 315L size makes this model a large heat pump option. It is commonly compared by households that need more storage than a 250L or 280L model and want a recognised Rinnai heat pump product.

For other Rinnai options, Installed Today’s Rinnai Hot Water Systems collection is the best place to compare Rinnai electric, gas, instant and heat pump models.

Who Is the Rinnai Enviroflo 315L Best Suited To?

The Rinnai Enviroflo 315L is best suited to homes that:

are replacing a larger electric storage hot water system
want more storage than a medium heat pump
have higher daily hot water demand
have suitable outdoor space or a compliant internal location
can provide the required airflow and clearances
have suitable drainage for condensate and relief valve discharge
can support the required electrical setup
want a recognised-brand heat pump option
want a larger tank without moving to gas hot water

It may not be the best option for smaller homes, tight side access, compact apartments, low-use households, noise-sensitive locations, or properties where a suitable 15 amp electrical supply is not available without extra work.

If your household does not need a large tank, it may be worth comparing smaller options in Installed Today’s broader Heat Pump Hot Water Systems category before choosing a 315L model.

Rinnai Enviroflo 315L Key Features

Key features include:

315L storage capacity
Integrated electric heat pump design
R290 refrigerant
2.4kW electric element
15 amp rated current
48 dB(A) listed sound level
Heat pump operation across a wide ambient temperature range
1000 kPa PTR valve setting
Factory weekly heat cycle for temperature requirements
External or internal installation where requirements are met
Upright free-standing installation design
Listed 500mm fan discharge clearance requirement
Listed 150mm fan suction clearance requirement
Rinnai Enviroflo V2 model family
7-year cylinder warranty under Rinnai warranty terms

The main benefit is the combination of storage volume and heat pump operation. The system is designed for households that need a larger stored hot water volume but want to reduce reliance on traditional electric element heating.

Long-Term Use: What Homeowners Usually Notice

In long-term use, the biggest benefit of the Rinnai Enviroflo 315L is that it can reduce electricity use compared with a standard electric storage hot water system, provided it is installed and set up correctly.

Homeowners usually notice:

stronger stored capacity than medium heat pumps
lower running cost potential than traditional electric storage
good fit for higher daily hot water demand
audible fan and compressor operation when running
more installation planning than a standard electric tank
importance of drainage and airflow
importance of timer and operating mode setup
need for the right electrical supply

A large heat pump should not be chosen only because bigger seems better. The best result comes from matching the storage size, recovery pattern and installation location to the household’s actual hot water use.

Real-World Energy Savings

The Rinnai Enviroflo 315L can reduce running costs compared with a standard electric storage system, but the exact saving depends on the home.

Savings are affected by:

daily hot water use
household size
shower length
electricity tariff rates
timer settings
ambient air temperature
installation location
backup element use
solar power availability
maintenance
whether the system is correctly sized

In warmer locations such as Brisbane and the Gold Coast, heat pumps often have favourable operating conditions because they draw heat from the surrounding air. However, performance still depends on airflow, installation location, settings and household demand.

A poorly placed or incorrectly sized heat pump can perform worse than expected, even if the unit itself is capable.

Rinnai Enviroflo 315L and Solar Power

The Rinnai Enviroflo 315L can work well in homes with rooftop solar when the system is set to heat during daylight hours.

This can help the household use more of its own solar-generated electricity instead of exporting excess power back to the grid. The heat pump heats and stores water during the day, then the household uses that stored hot water later.

A solar-friendly setup usually involves:

running the heat pump during strong solar production hours
avoiding unnecessary overnight heating
making sure the tank is large enough for evening and morning use
checking backup element use
using timer settings that suit household routines
ensuring the household still has hot water during bad weather or high-demand periods

This does not mean the system produces free hot water. Solar benefit still depends on weather, solar output, feed-in tariff, electricity rates, usage patterns and timer settings.

Noise: Is the Rinnai Enviroflo 315L Loud?

The Rinnai Enviroflo 315L is listed at 48 dB(A), so it should be treated like other heat pump hot water systems with a fan and compressor. It is not silent.

In the right location, the noise is usually manageable. In the wrong location, it can become annoying for the household or neighbours.

Avoid placing the unit too close to:

bedroom windows
neighbouring bedrooms
narrow side passages
home offices
outdoor entertaining areas
boundary fences with poor sound separation
enclosed spaces without suitable airflow

Noise is not just about the listed dB rating. Walls, fences, corners, concrete surfaces, airflow restriction and the final installation position can all affect how loud the unit feels in real life.

Rinnai Enviroflo 315L vs Standard Electric Hot Water

The Rinnai Enviroflo 315L is usually a better long-term running cost option than a traditional 315L electric storage system, but it is not always the simplest replacement.

A standard electric storage system is usually cheaper upfront, quieter and easier to replace like-for-like. It does not need the same airflow clearances as a heat pump.

The Rinnai Enviroflo costs more upfront and needs more planning, but it can reduce electricity use when installed correctly.

If the main goal is the lowest upfront cost, a standard electric storage system may still be the better option. If the goal is reducing long-term electricity use, the Rinnai Enviroflo 315L is worth comparing.

Rinnai Enviroflo 315L vs Other Large Heat Pumps

The Rinnai Enviroflo 315L is commonly compared against other large heat pump hot water systems from brands such as iStore, Enviroheat, Emerald Energy, Rheem, Stiebel Eltron and Reclaim.

Its main appeal is the 315L storage capacity, recognised Rinnai brand, R290 refrigerant and suitability for households replacing larger electric storage systems.

When comparing it with other models in Installed Today’s Large Heat Pump Hot Water Systems category, check:

tank capacity
unit height and width
noise rating
electrical requirements
refrigerant type
element size
clearance requirements
installation location
warranty terms
solar timer options
household suitability
availability
supply-only or supplied-and-installed options

The right large heat pump is not always the biggest one. It is the one that suits the household’s demand, available space, access, drainage, electrical setup and budget.

Rinnai Enviroflo 315L vs Rinnai GR Series Heat Pumps

The Rinnai Enviroflo V2 315L is an earlier large-capacity Rinnai Enviroflo option. Rinnai’s newer GR Series heat pumps may be worth comparing if you want current model features, different tank sizes or different electrical requirements.

For example, some customers may compare the 315L Enviroflo V2 with Rinnai Enviroflo GR Series models such as 280L or 300L options. The better choice depends on the household’s hot water demand, product availability, electrical setup, price, installation conditions and whether the customer wants the older 315L capacity or a newer Rinnai heat pump model.

This is why it is worth checking the full Rinnai Hot Water Systems range instead of choosing one model in isolation.

Supply Only vs Supplied and Installed

Installed Today offers supply-only ordering for customers who already have their own licensed installer arranged. Supply-only pricing is for the product only and does not include installation, valves, old unit removal, disposal, electrical work, pipework changes, drainage work or compliance upgrades unless those options are clearly selected or shown on the product page.

Supplied-and-installed options may be available on selected products in eligible Brisbane and Gold Coast service areas. Availability depends on the product, location, access, existing setup, electrical suitability, drainage, clearance requirements, required extras and site requirements.

Before ordering supply only, make sure your installer has confirmed that the Rinnai Enviroflo 315L suits the property, electrical supply, drainage, airflow, clearances, access path and household demand.

Brisbane and Gold Coast Buying Context

For Brisbane and Gold Coast homes, the Rinnai Enviroflo 315L can be a practical option where a larger household wants to move from standard electric storage to heat pump hot water.

The warmer South East Queensland climate can be favourable for heat pump operation, but site suitability still matters.

Local homes should check:

whether the current system is electric, gas or heat pump
whether the household genuinely needs 315L storage
whether the unit can be positioned with clear airflow
whether the location is too close to bedrooms or neighbours
whether drainage is available
whether a suitable 15 amp electrical supply is available
whether access allows safe delivery and positioning
whether the unit height suits the location
whether supply only or supplied and installed is required

Heat pump installation is more site-sensitive than a standard electric replacement. Good location planning is essential.

Common Rinnai Enviroflo 315L Issues to Watch For

Common issues with large heat pumps are usually related to installation, settings, drainage, electrical supply or incorrect sizing.

Things to watch for include:

unit running at inconvenient times
not enough hot water after heavy use
noise complaints from poor placement
slow recovery in poor conditions
restricted airflow
condensate drainage issues
relief valve discharge issues
electrical supply not suitable
backup element use increasing running costs
installation space not meeting clearance requirements

Many issues can be avoided by confirming the site before purchase and setting the system up properly after installation.

Maintenance and Reliability

The Rinnai Enviroflo 315L is designed as a long-term heat pump hot water system, but it is not maintenance-free.

Maintenance considerations include:

keeping airflow clear around the unit
checking condensate drainage
watching for unusual noises
checking for changes in recovery time
keeping the system accessible for servicing
checking valve discharge
following manufacturer service requirements
having electrical issues checked by a licensed electrician
having plumbing issues checked by a licensed plumber

Because heat pumps include a fan, compressor, controller, tank, valves and electrical components, correct installation and maintenance matter more than they do with a basic electric storage tank.

Before Ordering Checklist

Before ordering the Rinnai Enviroflo 315L, check:

how many people live in the home
how many bathrooms are used daily
whether showers are short or long
whether the home has heavy morning or evening hot water demand
whether the old system was large enough
whether a smaller heat pump would be enough
whether rooftop solar is available
where the unit will be installed
whether noise could affect bedrooms or neighbours
whether airflow clearances can be met
whether condensate and valve drainage are suitable
whether a 15 amp electrical setup is available
whether access can handle the unit size
whether supply only or supplied and installed is needed

This helps avoid choosing a system that is too large, too difficult to install, too close to noise-sensitive areas or unsuitable for the electrical setup.

Is the Rinnai Enviroflo 315L Worth It?

The Rinnai Enviroflo 315L is worth considering if you need a large-capacity heat pump hot water system and the property has the right installation conditions.

It is a good option when:

you are replacing a larger electric storage hot water system
your household has higher daily hot water demand
you want a recognised Rinnai heat pump product
you have enough outdoor space and airflow
you can manage drainage properly
your electrical setup can support the system
you want better running cost potential than standard electric storage

It may not be the right option if:

you need the cheapest replacement
your household has low hot water demand
you need a silent hot water system
the only available location is near bedrooms
your property does not have suitable airflow or drainage
electrical upgrades make the job too expensive
a medium heat pump would be a better fit

For many larger homes, it can be a smart upgrade. For smaller households, a medium heat pump may be more practical.

Long-Tail FAQs

Is the Rinnai Enviroflo 315L big enough for a large family?

The Rinnai Enviroflo 315L can suit larger households with higher hot water demand, but the right size depends on shower habits, bathroom count, bath use, laundry demand, climate, timer settings and recovery needs. A large tank helps, but sizing should still be confirmed before ordering.

Can the Rinnai Enviroflo 315L replace a 315L electric hot water system?

Yes, it can be a strong replacement option for selected 315L electric storage systems where the property has suitable space, airflow, drainage, electrical supply and access. It is not always a simple like-for-like swap, because heat pumps have extra installation requirements.

Does the Rinnai Enviroflo 315L need a 15 amp connection?

The Rinnai Enviroflo V2 315L is listed with a 15 amp rated current, so electrical suitability must be checked before installation. Some properties may need electrical work, a dedicated circuit, isolator, switchboard changes or other compliance work.

Is the Rinnai Enviroflo 315L noisy?

It is listed at 48 dB(A), so it will be audible when running. The sound is usually manageable when the unit is installed in a sensible location with good airflow and distance from bedrooms, neighbours and quiet outdoor areas.

Is the Rinnai Enviroflo 315L better than a standard electric hot water system?

For running cost potential, yes, it can be better than a standard electric storage system. For lowest upfront cost, easiest replacement and silent operation, a standard electric system may still suit some homes better.

Can the Rinnai Enviroflo 315L work with rooftop solar?

Yes, it can work well in homes with rooftop solar when timer settings are used to run the heat pump during daylight hours. The actual benefit depends on solar production, household demand, tariff rates and system settings.

What is the main downside of the Rinnai Enviroflo 315L?

The main downside is installation complexity. It needs the right location, airflow, drainage, electrical supply, clearances and noise placement. If the site is not suitable, a smaller heat pump, standard electric system or another model may be a better option.

Final Word

The Rinnai Enviroflo V2 315L heat pump is a strong large-capacity option for households wanting to upgrade from standard electric storage to heat pump hot water. It offers 315L storage, recognised Rinnai branding and better running cost potential than traditional electric storage where the home suits heat pump installation.

It is best for larger households, higher-use homes and properties with suitable outdoor space, drainage, airflow and electrical supply. It is not the simplest or cheapest replacement, and placement matters because of noise, clearances and access.

Browse the Rinnai Enviroflo V2 315L Heat Pump Hot Water System, compare more Large Heat Pump Hot Water Systems, or explore Installed Today’s full Heat Pump Hot Water Systems range before deciding.