Rheem Mpi 325L Heat Pump Hot Water System

Rheem Mpi 325L Heat Pump Hot Water System - Installed Today
Rheem Mpi 325L Heat Pump Hot Water System - Installed Today

Rheem Mpi 325L Heat Pump Hot Water System

Installed Today, Enjoyed Tomorrow. Seamless Service, Every Time
Regular price $4,649.00
  • Express Delivery to Metropolitan Cities
  • Over 90% of Systems Delivered Same Day
  • Secure payments
  • Greater Brisbane - Gold Coast Installation Available
  • Same Day Installation Option
  • In stock, ready to ship
  • Inventory on the way


Same day installation is only available business days (Monday-Friday EXC Public Holidays) with online purchases prior to 8am, all orders after 8am will be installed the following business day unless availability has been confirmed in writing prior. The installer will advise of installation time and where the customer is not available the installation will be moved to the following day.

All online packages are for a like for like (see definition below) EXTERNAL (outside building lines) replacement of existing compliant installation only and installation fees do not cover relocating the system, upgrades to current standards, electrical supply alterations outside of a standard disconnect/reconnect, upgrades due to insufficient gas, water or power supplies or repairs of any kind outside of the hot water system. All electrical hot water systems must be perpendicular to the wall with the electrical connection at the front and center facing forward.

All installations are for replacement of an existing system only (excluding water filters) and must be EXTERNAL to the building unless confirmed with installed today prior in writing. Please note where installed internally additional rates and conditions apply.

Installed Today will arrange a reputable installer to install your system when requested. All workmanship warranties will be between the purchaser and the installer. All product warranties will be handled by Installed Today.


Price for installation includes the valve kit only plus applicable basic sundries. Where required the installer will provide pricing for any additional work outside a standard like for like external installation not mentioned in rates below.

Please see rates below for any additional required work and all additional work is to be paid directly to the installer. Note some work may be mandatory to meet any legal or manufacturer requirements and will be added to your final invoice. Other work may be required if the selected system is not a like for like EXTERNAL replacement and only optional extras not required will be discussed prior to installation.

Where you require explicit costs prior to install please send a photo of the existing system to help@installedtoday for clarification at least 1 business day prior to installation if extra additional work is needed. Confirmation of photos being received and viewed will be sent via email.

Installers may send quotes reconfirming the rates below prior to install for approval along with same day payment conditions. Quoted installation rates apply only to payment at time of install of within 24hours of invoice issue only. Any discounts applied for prompt payment will be removed from quotes when paid outside the agreed time period. Any quotes issued will require approval prior to any installation taking place. 

Possible Mandatory Requirements for External Like for Like Replacements (added to invoice where legally or manufacturer required)
1. Gas main upgrades +$75pm
2. LPG Regulator Replacement - 250mj Manual +$250
3. LPG Regulator Replacement - 450mj Auto +$350
4. LPG Gas Bottle Restraint Set +$50
5. Additional pipework outside of package inclusions +$45pm supplied and fitted
6. Electrical extensions where the power does not reach the required connection point +$350
7. RCBO Safety switch where required if power is to be extended +$200
8. Internal Installations +$150
9. Internal Installations Requiring Safe Tray and Mildred Valve +$450
10. Water main location and/or subsurface relocation externally +$550
11. New concrete Support Bases +$80
12. New plastic pizza type support spacer +$50
13. Excavation $850m2
14. Element Swaps +$80
15. Fixture relocation or removal, inc access clearing or any disassembly required to access site (+$35 per 15minutes)
16. Two man install where access issues noted below are applicable and installation is not safe to be completed by a single person +$200

Optional Extras
17. Electrical new circuit +$600 includes circuit upto 10m in single phase
18. Hot water System Disposal exc Heat Pump and Solar +$80
19. Heat Pump/Solar system disposal +$120
20. Solar Removal from Roof Inc Crane Hire +$900
21. System Relocations inc Plumbing and Electrical +$1200
22. LPG Manifold - 3 Bottle +$200
23. LPG Manifold - 4 Bottle +$250
24. Key pickup and delivery for real estate +$75 per drop off/pickup

Two man install where access issues noted below are applicable and installation is not safe to be completed by a single person (+$200). Access for installation is to be free of stairs, steep driveways, through homes, over retaining walls, in ceilings. Unit must be able to be maneuvered by hand trolley from vehicle to installation position without being carried. Confirmation from installed today in writing of access suitability where any of the above conditions apply.


Like for like replacement includes the following replacement types below ONLY. Note all systems are for replacement installation only in an external compliant position. Please confirm the system will fit in the desired position prior to purchasing. If in doubt please send pictures to help@installedtoday.com.au to confirm.

A. Gas storage replaced with Gas Storage

B. Continuous Flow replaced with Gas Storage

C. Continuous Flow replaced with Continuous Flow (Note power point must be reused and/or preinstalled)

D. Electric Storage replaced with Electric Storage

E. Electric Storage replaced with Heat pump 

F. Heat pump replaced with Heat pump

G. Heat pump replaced with Electric Storage (May require electrician to extend circuit at additional cost)

Tax included. Shipping calculated at checkout.

From our customers


Easy process- booked Thursday night- installed rheem stellar 250 litre next day. Brandon Lachlan and Sean set it up quick and easy. Beat all other quotes.

Jeremy L
Brisbane, QLD

Very helpful and fast service. Called in the morning and had a new hot water system installed in the afternoon. Very friendly and helpful installer.

Robert A
Brisbane, QLD

Excellent service, fantastic booking and notification systems and new hot water certificate received promptly when the job was complete. Very neat and tidy job.

Jennifer B
Brisbane, QLD

Thanks to the company, quick quatation, individualised service, competitive price, nice staffs, good explaining, quick job with high standard, strongly recommend, especially Mark, electrician, very professional.

Peter W
Brisbane, QLD

Stiebel and Enviroheats Is the best guys to fixed our home gas hot water system
They were coming on time and quicker to fix.

Andy H
Brisbane, QLD

Maximizing Home Efficiency with the Rheem MPi 325 Heat Pump Hot Water System

Wondering if the Rheem MPi 325 heat pump hot water system is right for your home? This system is not only energy-efficient, reducing your utility bills, but also embodies sustainability with its eco-friendly operation. Ideal for average-sized families, enjoy the quietness provided by Whisper Technology and dependable performance in any Australian weather. Get ready to uncover the practicality of the Rheem MPi 325 in the following insights.

Key Takeaways

  • The Rheem MPi 325 Heat Pump Hot Water System offers energy efficiency, reducing energy usage by up to 65%, working quietly with Whisper Technology, and is designed to be eco-friendly, leveraging ambient heat to save on bills and reduce carbon footprint.

  • It performs optimally in Australian climates, operating effectively from -5°C to 43°C, and includes frost protection and a backup electric element to ensure a steady hot water supply in various weather conditions.

  • The system is designed to cater to average-sized families (2-5 people), boasts easy installation compatible with existing infrastructures, comes with comprehensive warranty coverage, and provides long-term savings potential through significant energy bill reductions.

Discover the Benefits of Rheem MPi 325 Heat Pump Hot Water System

The Rheem MPi 325 Heat Pump is a paragon of sustainability and energy efficiency in hot water systems. This innovative system offers the following benefits:

  • Harnesses ambient heat to warm your water, significantly reducing your family’s carbon footprint

  • Provides hot water even in cold weather conditions

  • Operates quietly and efficiently

  • Saves you money on your energy bills

However, the advantages of the Rheem MPi 325 extend beyond its eco-friendly nature. This remarkable heat pump hot water system incorporates advanced Whisper Technology, ensuring quiet operation. Imagine having a system that is as silent as a soft conversation, thanks to a smaller compressor and state-of-the-art technology.

Energy Efficiency and Savings

The Rheem MPi 325, a product of a leading energy provider, promises a substantial reduction in your electricity account through an efficient tariff arrangement. This system can reduce energy use by up to 65%, translating into substantial cost savings.

Not only does it save you money, but the Rheem MPi 325 also exhibits a high Coefficient of Performance (COP) of 4.5, meaning it maintains optimal heat production. This efficiency is enhanced by the use of multi-pass heating, which ensures the water in your tank is heated uniformly. The result? A water heater that not only saves you money but also contributes to environmental conservation.

Eco-Friendly Heating Solution

The Rheem MPi 325 Heat Pump revolutionizes eco-friendly heating solutions. This innovative system harnesses renewable heat energy from the surrounding air to heat water effectively, reducing greenhouse gas emissions.

Compared to conventional electric water heaters, the Rheem MPi 325 offers several advantages:

  • It operates with three times more efficiency

  • It leverages eco-friendly technology

  • It contributes significantly to reducing greenhouse gas emissions

  • It is an ideal choice for environmentally conscious families.

Whisper Technology

Forget about noise pollution in your home with the Rheem MPi 325. Thanks to its advanced Whisper Technology, this heat pump hot water system operates at a remarkably low noise level of 49 decibels – comparable to the sound of a soft conversation.

In addition to offering energy-efficient and eco-friendly operation, the Rheem MPi 325 also ensures a peaceful home environment.

Optimal Performance in Australian Climates

The Rheem MPi 325 breaks the mold of typical hot water systems. It’s a unit specifically optimised for Australian families, providing efficient performance regardless of the climate. Whether you’re living in a moderate or warm climate, this unit will deliver consistent hot water without relying on sunlight.

With an operational range from -5°C to 43°C, the Rheem MPi 325 is adaptable to various Australian climates. It adjusts efficiently to fluctuating temperatures, delivering high recovery rates for quick water heating. Moreover, it’s equipped with frost protection, ensuring a consistent hot water supply even when temperatures drop to -5˚C.

Climate Compatibility

Designed for the varying Australian climates, the Rheem MPi 325 delivers efficient performance even in temperatures ranging from -5°C to 43°C. This robust performance allows it to serve your hot water needs efficiently, regardless of the weather conditions.

From moderate to warm climates, the Rheem MPi 325 is optimised for use across Australia. Its efficiency increases as the ambient temperature rises, proving its adaptability to various climate types.

Frost Protection Feature

The Rheem MPi 325 includes a frost protection mechanism, ensuring operation even in chillier climates. Once the temperature drops below 3°C, this feature is activated, preventing the water heater from freezing.

In addition to the frost protection, the Rheem MPi 325 also features a backup electric element. This component ensures a steady supply of hot water, especially during cold winter nights when demand is high. These two features combined enable the Rheem MPi 325 to deliver consistent hot water availability, regardless of the weather conditions.

Catering to the Needs of Average-Sized Families

Tailored to meet the needs of average size families, the Rheem MPi 325 efficiently serves households of 2-5 people. Manufactured in Australia, this system supports the hot water needs of a typical household and is a testament to Rheem’s commitment to delivering solutions that cater to customers’ needs.

Tank Capacity and Temperature

The Rheem MPi 325 boasts the following features:

  • Steady hot water temperature of 60°C

  • Suitable for average-sized families

  • Ensures that everyone in the household has access to hot water when they need it

Backup Element

To ensure continuous hot water availability, the Rheem MPi 325 includes a backup electric element. This feature activates, especially during cold winter nights or periods of high demand, providing a steady supply of hot water.

The backup element is a reliable supplement to the heat pump. It ensures that the system operates efficiently even when ambient temperatures are too low for the heat pump to function optimally. This feature ensures that you will never run out of hot water, even in the most demanding circumstances.

Installation and Replacement Made Easy

Ease of installation and replacement is a fundamental design feature of the Rheem MPi 325 Heat Pump. It’s compatible with existing plumbing and electrical infrastructure, making the installation process straightforward for qualified technicians.

However, akin to other systems, it may encounter installation challenges like the requirement for extra components or plumbing adjustments. But fear not, Rheem offers detailed guidelines for the MPi 325 installation, ensuring a smooth and hassle-free setup.

Replacing Electric Water Heaters

If an ideal replacement for your old electric water heater is on the cards, the Rheem MPi 325 offers a substantial upgrade. By switching to this heat pump, you can reap numerous benefits, including energy efficiency and cost savings.

In addition to these financial benefits, the Rheem MPi 325 also offers enhanced safety features. For instance, the RheemPlus models have a maximum temperature of 50°C, reducing the risk of scalding and making it safer for family use.

Proper Installation and Maintenance

The long-term performance of the Rheem MPi 325 hinges on correct installation and regular maintenance. Regular cleaning or replacement of air filters is essential to maintain efficiency, as clogged filters can impede the system’s performance.

Moreover, it’s important to ensure that the condenser and evaporator coils, as well as the heat exchanger, are kept clean for efficient heat transfer. Maintaining clear surroundings and good ventilation around the heat pump is also vital for optimal system efficiency.

Warranty and Longevity Assurance

When you invest in a hot water system such as the Rheem MPi 325, its longevity and reliability are of paramount importance. This system comes with a comprehensive warranty, covering the cylinder and its components for 5 years, offering peace of mind with your investment.

Expected Lifespan

Typically, the Rheem MPi 325 Heat Pump has a lifespan of 5 to 15 years, contingent on factors like:

  • Installation quality

  • Regular maintenance

  • Water quality

  • Equipment including thermostats and flow restrictors.

To prolong the system’s lifespan, it is crucial to adhere to proper maintenance practices, such as:

  • Setting the thermostat at 120°F (49°C)

  • Regular leak monitoring

  • Periodic pressure relief valve testing

  • Anode rod inspection and replacement

  • Insulating hot water pipes.

Comprehensive Warranty

A comprehensive warranty supports the Rheem MPi 325. It includes:

  • 5-year cylinder warranty

  • 3-year cylinder labour warranty

  • 2-year sealed system supply and labour warranty

  • 1-year parts supply warranty

In addition to the warranty, Rheem offers dedicated after-sales support services for any warranty inquiries. Customers have access to a dedicated contact form on the Rheem website to address warranty service or questions.

Analyzing Investment vs. Savings

A long-term investment in a Rheem MPi 325 guarantees significant returns. From significant energy bill reductions to comprehensive warranty coverage, this hot water system underscores its value over time.

Initial Purchase Price

The upfront cost of the Rheem MPi 325 lies between $3,900 and $4,500. While this might seem like a significant investment upfront, financing options are available to assist customers, making it easier to acquire this efficient and reliable hot water system.

Government Rebates and Incentives

Investing in a Rheem MPi 325 Heat Pump opens up the possibility of cashing in on a variety of government rebates and incentives. This system qualifies for Small-scale Technology Certificates (STCs), which offer a financial benefit for systems that meet certain energy efficiency standards in Australia. Before making a decision, consider seeking a purchase consult to ensure you’re making the best choice for your needs.

In addition to STCs, homeowners in Victoria can benefit from the Solar Homes Program, which offers a rebate of up to $1000 for the installation of renewable energy systems like heat pumps. Other states also offer similar incentives, making the Rheem MPi 325 even more affordable.

Long-Term Energy Bill Reduction

A significant advantage of investing in a Rheem MPi 325 is the prospect of long-term energy bill savings. This system can reduce energy consumption by as much as 73% compared to conventional electric water heaters, leading to significant long-term savings.

The savings don’t stop there. Factors such as cost comparisons, the system’s Coefficient of Performance (COP), water quality, type of heat pump technology, and overall energy efficiency play a crucial role in determining the best option for your needs.

Long-term savings on energy bills can be influenced by the Rheem MPi 325 storage tank, making it a valuable investment.


Investing in a Rheem MPi 325 Heat Pump means investing in a future of energy efficiency, cost savings, and eco-friendly living. It’s an investment in a system that caters to the needs of average-sized families, performs optimally in diverse Australian climates, and offers easy installation and replacement.

Moreover, it’s an investment backed by a comprehensive warranty, with an expected lifespan of 5 to 15 years, further enhanced by government rebates and incentives. The Rheem MPi 325 is more than just a hot water system; it’s a pathway to a sustainable and cost-effective future.

Frequently Asked Questions

What is the average life of a Rheem heat pump?

The average lifespan of a Rheem heat pump is around 15 years, and it may last longer with proper installation and maintenance. Heat pumps work by transferring heat using refrigerant, serving a dual purpose throughout the year.

What is the best heat pump to buy in Australia?

The best heat pump to buy in Australia is the Rheem Ambiheat Heat Pump, known for its energy efficiency and top-class hot water system.

Are Rheem heat pumps loud?

Yes, Rheem heat pumps are quiet, with a low rating of 49 dB, making them suitable for installation in most areas of the house without being noticeable.

Is Rheem heat pump any good?

Yes, the Rheem Ambiheat HDc270 Heat Pump is a good option for saving energy and heating water efficiently.

What are the benefits of the Rheem MPi 325 Heat Pump?

The Rheem MPi 325 Heat Pump offers energy efficiency, cost savings, eco-friendliness, and quiet operation, making it a highly beneficial choice for heating needs.

Installation Service (Optional):
For your convenience, we offer an optional installation service through our network of trusted and professional contractors. Please note, the installation service is a separate arrangement directly between you and the contractor. Installation fees are to be paid directly to the contractor. We have carefully selected contractors based on their expertise and customer service to ensure you receive the best installation experience.

How It Works:

  1. Select Installation Service: Indicate your interest in installation service during the checkout process.
  2. Contractor Assignment: We will assign a certified contractor from our network to handle your installation.
  3. Payment for Installation: Please be aware that the payment for the installation service is to be made directly to the contractor. We do not collect installation charges on behalf of the contractor.
  4. Schedule Your Installation: The assigned contractor will contact you to schedule the installation at your convenience.
  5. Direct Support: For any questions or support related to the installation process, please direct your inquiries to the contractor.

Please Note: Our role is to supply the product and facilitate the connection with a certified contractor for installation services. All agreements, payments, and warranties related to the installation are between you and the contractor.

Experience the "Installed Today" Difference with Our Verified Installers

When you choose "Installed Today" for your installation needs, you're not just getting a product; you're gaining access to a network of rigorously verified installers dedicated to providing you with an exceptional service experience. Here's what you can expect when you opt for an installation by an "Installed Today" verified installer:

Professional and Efficient Service

  • Prompt Communication: Our verified installers will contact you within 2 business hours of receiving your order details to confirm and begin scheduling your installation at the earliest convenience.
  • Expert Installation: All "Installed Today" installers are highly skilled and qualified, ensuring your product is installed according to the highest industry standards and specific regulations in your area.
  • Clear and Professional Communication: From the moment they receive your order until the completion of your installation, our installers maintain clear and professional communication, providing you with all necessary information regarding your installation.

Peace of Mind

  • Insurance and Liability: Every "Installed Today" verified installer maintains comprehensive insurance coverage, giving you peace of mind knowing you're protected throughout the installation process.
  • Warranty and Quality Assurance: Enjoy a warranty on your installation, guaranteeing rectification work at no additional charge in the unlikely event of any deficiencies. Our installers strive to achieve a minimum 4.5-star average rating across major review platforms, reflecting our commitment to excellence and customer satisfaction.

Customer-Centric Policies

  • Customer Dispute Resolution: In the rare event of a dispute, our installers are committed to acknowledging and initiating the resolution process within 1 business day, aiming for a swift and satisfactory resolution within 5 business days.
  • Rectification Work Timeframes: Should any rectification work be necessary, it will be acknowledged within 1 business day and completed within 2 business days, ensuring minimal inconvenience to you.

Additional Services at Transparent Rates

  • Beyond Basic Installation: Our verified installers offer a range of additional services to complement your installation. All available services and their set rates are communicated upfront, ensuring no surprises.

By choosing "Installed Today," you're not just installing a product; you're investing in a seamless, quality service that values your time and peace of mind. Trust in our verified installers to exceed your expectations with their professionalism, expertise, and commitment to excellence.

This product description outlines the benefits and assurances provided by "Installed Today" verified installers, designed to inform and reassure customers about the high level of service they can expect.


Greater Brisbane and Gold Coast (EXCLUDING BAY ISLANDS) - 1 business day

Metropolitan Cities - Up to 3 Business Days

Non-Serviced Metropolitan Areas (confirmation via email to availability only) - Upto 10 business days


Greater Brisbane and Gold Coast (EXCLUDING BAY ISLANDS) - Up to 2 business days

Metropolitan Cities - Up to 4 Business Days

Non-Serviced Metropolitan Areas (confirmation via email to availability only) - Upto 10 business days


Greater Brisbane and Gold Coast - up to 5 business days

Metropolitan Cities & Centres - Up to 10 Business Days



-Gold Coast

-Sunshine Coast


-Coffs Harbour













-Harvey Bay



-Tweed Heads


Brand - Rheem

Model - 551325

Volume (L) - 325

Height (mm) - 1613

Width (mm) - 619

Weight (kg) - 130

Energy Rating - 6.0/6

Made In - Australia

Made By - Rheem

Maximum Warranty - 5years

Internal Material - Steel

Noise Level (dBa) - 47

Recommend Occupants - 6-7

Recommended Bathrooms - 1-3

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