At a Glance: Rheem AmbiPower MDc-180 Scores 3.5 Out of 5
Scoring is based on our heat pump scorecard, which is consistently applied to each brand and heat pump model available on the Australian market.
$$ Price: The AmbiPower MDc-180 is positioned in the lower cost category of the Australian heat pump market, with typical retail pricing between $2,800–$3,200 (excluding installation and rebates) on the Solar Choice Scorecard.
- Company Backing & Trustworthiness – Score 5/5: Rheem is one of the most established hot water manufacturers in Australia. Rheem was incorporated locally in 1936, manufactured its first Australian gas water heater in 1939, has major corporate locations in Rydalmere NSW and Moorabbin VIC, and reports to employ hundreds of people across its Australian operations. That scale, brand recognition and long local operating history support a top-tier score on the Solar Choice scorecard.
- Warranty Offer – Score 2/5: The system includes a 7-year warranty on the cylinder, 3 years on the sealed refrigeration system including labour, and 1 year on all other components including labour. While the cylinder coverage is solid, the shorter cover on other parts is less competitive than the stronger whole-of-system warranties offered by some competing brands.
- Customer Reviews – Score 5/5: Rheem currently holds a 5.0 rating from a limited number of customer reviews available on Solar Choice’s independent review platform.
- Functionality – Score 2/5: The Rheem AmbiPower MDc-180 offers strong heating performance, with heating output of roughly 18W per litre, which earns full points for heating power under the Solar Choice scorecard. However, it does not meet the scorecard threshold for quiet operation, does not offer Wi-Fi app control, and does not include 2 or more programmable heating schedules.
Company Background
Rheem has a long history in Australia dating back to 1936 when the US parent company launched Rheem Manufacturing Co (Australia) Proprietary Ltd as an overseas subsidiary. The company focused on the manufacturing and distribution of water heaters.
BHP acquired a 50% stake in 1939 and later acquired the remaining 50% in 1973. Rheem Australia was acquired twice since then. First by Southcorp Limited in 1988 and later in 2001 the current owners Paloma Co Ltd acquired a controlling interest in the company.
Many of Rheem’s water heaters are still manufactured in Australia in their facilities in Sydney and Melbourne. With a large local workforce of around employees, Rheem operates from its headquarters in Rydalmere, New South Wales, and offers a wide range of residential and commercial water heating solutions.
Rheem Hot Water Heat Pump Available Range
Want to see how the Rheem AmbiPower stacks up against other systems? Compare all reviewed heat pumps or explore our expert picks in the best heat pumps in Australia comparison. To estimate your potential energy savings, use our heat pump savings calculator.
Here’s how the current models stack up for Australian homes:
| Model Name | Tank Size | Household Size | Noise | Key Notes |
|---|---|---|---|---|
AmbiPower 280e (551E280) | 280L | 3–5 people | 47 dB(A) | Integrated heat pump with R290 refrigerant and 10-year cylinder warranty Warranty doc: Owner’s Guide Spec sheet: AmbiPower 280e specificationst |
AmbiPower MDc-180 (551D180) | 178L | 2–4 people | 48 dB(A) | Compact model with cold-climate operation down to -7°C and 7-year cylinder warranty Warranty / Spec Sheet: Owner’s Guide |
Ambiheat HDc-270 (551270 / 571D270) | 270L | 4–6 people | 47 dB(A) | Larger integrated system with 10-year cylinder warranty Spec sheet: Ambiheat HDc270 datasheet Warranty Doc: HDc270-Owners Guide |
AmbiPower 5kW Split VE (565E315) | 315L | Up to 6 people | 47 dB(A) | Split-system heat pump with 10-year cylinder warranty Warranty doc: Owner’s Guide Spec sheet: AmbiPower Split 5kW datasheet |
AmbiPower 5kW Split Stainless (565E32A) | 325L | Up to 6 people | 47 dB(A) | Stainless split-system heat pump with 10-year cylinder warranty Warranty doc: Owner’s Guide Spec sheet: AmbiPower Split 5kW datasheet |
Notes:
- Noise Matters: If the unit is installed near bedrooms or living areas, we recommend models rated ≤45 dB(A)—none of Rheems models meet this quiet operation scoring threshold.
- Heating Efficiency: Systems with 10+ W/L heat more water per kilowatt. Great for fast hot water recovery times and energy savings long term.
- Timers: We could only see that the Ambiheat HDc-270 offering multiple programmable schedules. Others have a single on/off daily cycle.
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Rheem Heat Pump Warranty Terms and Conditions
Rheem’s residential heat pump warranty now varies by model. In the current range, the AmbiPower MDc-180 has a 7-year cylinder warranty, while the AmbiPower 280e, Ambiheat HDc270, and AmbiPower 5kW Split models have a 10-year cylinder warranty.
| Part | MDc-180 | 280e / HDc270 / 5kW Split models |
|---|---|---|
| Hot water cylinder | 7 years | 10 years |
| Labour on cylinder | 3 years | 3 years |
| Sealed system / compressor | 3 years | 3 years |
| Other parts & components | 1 year | 1 year |
Key Warranty Notes
- Warranty coverage varies across the Rheem heat pump range, so it is worth checking the exact model before purchase.
- The MDc-180 has shorter cylinder coverage than Rheem’s newer 280e, HDc270, and 5kW split models.
- We did not find any standard optional extended warranty program for Rheem’s current residential heat pump range.
Rheem Heat Pumps Pros and Cons
The AmbiPower MDc-180 is Rheem’s compact heat pump hot water system for smaller households and colder climates. Backed by Rheem’s extensive support network and built for Australian conditions, this model offers excellent value for energy-conscious buyers.
Pros
- Cold climate performance
Rated to operate in ambient temperatures as low as -7°C, making it well-suited for homes in southern and inland regions. - Strong energy efficiency
Delivers an estimated heating output of 18 watts per litre—well above industry benchmarks—helping to reduce energy use and bills. - Eco-friendly refrigerant
Uses a lower global warming potential refrigerant than older legacy systems (such as R134a), although newer Rheem models like the 280e now use ultra-low GWP R290. - Backed by a trusted Australian brand
Manufactured and supported by Rheem, with nearly 90 years of experience.
Cons
- Single timer only
Only includes a basic daily on/off schedule—no dual timers or flexible scheduling for time-of-use tariffs or solar optimisation. - No Wi-Fi or smart features
All controls are managed on the unit itself; there’s no app connectivity or remote access. - Limited labour warranty on parts
The cylinder has longer cover, but most other components receive shorter warranty protection. Rheem provides 3 years on the sealed refrigeration system including labour, while other parts are covered for 1 year including labour. - Few independent reviews
As a newer model, there is limited public customer feedback available through independent platforms like Solar Choice.
How Much Do Rheem Heat Pump Hot Water Systems Cost?
Rheem offers a broad range of heat pump systems designed for Australian homes of all sizes and budgets. Prices vary based on model, tank size, refrigerant type, and features such as climate suitability and energy efficiency.
The table below shows estimated equipment-only prices (excluding installation and rebates), along with each model’s pricing tier according to the Solar Choice Heat Pump Scorecard.
| Model | Tank Size | Estimated Price Range | Scorecard Price Tier |
|---|---|---|---|
| AmbiPower MDc-180 (551D180) | 178 litres | A$2,800 – A$3,350 | $$ Lower Cost |
| AmbiPower 280e (551E280) | 280 litres | A$3,200 – A$3,500 | $$$ Mid-Range |
| Ambiheat HDc270 (571D270) | 270 litres | A$3,680 – A$4,275 | $$$ Mid-Range |
| AmbiPower 5kW Split VE (565E315) | 315 litres | A$4,400 – A$4,700 | $$$$ Higher Cost |
| AmbiPower 5kW Split Stainless (565E32A) | 325 litres | A$4,300 – A$4,900 | $$$$ Higher Cost |
Notes on Pricing:
- Prices are indicative and may vary depending on supplier, location, and promotional offers.
- Installation, freight, and government rebates are not included in the listed prices.
- Most Rheem models qualify for STCs and additional state rebates (especially in VIC and NSW), which can substantially lower the installed price.
- Price tiers reflect Solar Choice’s scorecard system, used to help homeowners compare value for money across brands.
Is the Rheem AmbiPower MDc-180 Worth It?
If you’re a homeowner looking for a compact, efficient, and cold-climate-compatible heat pump, the Rheem AmbiPower MDc-180 is a solid option in the lower cost price range.
It’s backed by a long-standing Australian brand, and it’s designed to perform well even in colder weather — down to -7°C. Its energy efficiency is well above average, which can help reduce your power bills over time. The unit also qualifies for government rebates, which can bring the net cost down significantly.
That said, it’s not without limitations. It offers only a single daily timer (no dual schedules), has no Wi-Fi or smart controls, and provides just one year of labour coverage on smaller parts.
Looking into heat pump hot water systems? Our comprehensive guide makes it easy, covering potential rebates, the real costs of hot water heat pumps, and the truth about ‘free’ upgrades. Learn about energy savings and understand the benefits and drawbacks with clear expert advice. For all you need to know before making a decision, check out our Heat Pump Hot Water Systems Buyers Guide.
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Reviews from Australians who have installed Rheem Heat Pumps
Review left 10 years after system installed
Very happy. My old unit was a Rheem gas unit, over 30 years old.
Yes very happy, a well known brand with backup unlike the old one that was installed by the home builder. Only 4 years old and no backup.
reason for choice was that it was Australian made with a great warrantee
Installation Photos
Old Rheem heat pump of 13 years has been replaced with similar model.
yes absolutely happy with the heat pump system
Very tidy unit and menu system to control daytime timer
Easy to use. Very quiet. Heats q9uickly
very happy with Rheem, quality product.
