Rheem AmbiPower MDc-180 (A551180C5) - NZ
AS/NZS 4234 energy savings (AU equivalent)
80%
vs the standard's reference electric storage water heater, VEU Zone 4, based on the AU-registered performance of the Rheem 180L (551D180) (same AmbiPower MDc-180 product line as the AU-registered 551D180 - identical -7 to 43C ambient range and brand naming; NZ SKU carries an A-prefix/C5-suffix regional code and a slightly different tank volume (178L NZ vs 180L AU) and COP figure (4.9 vs 4.5), possibly a later product revision) — not tested against AS/NZS 4234 as a NZ product itself.
Specifications
| Type | Integral all-in-one |
| Tank volume | 178 L |
| Rated power input | 0.683 kW |
| COP | 4.9 (at 19 degrees C ambient) |
| Operating ambient | -7 to 43 °C |
| Tank height | 1810 mm |
| Tank diameter | 576 mm |
| Tank weight (empty) | 116 kg |
| Electric backup | 2.4 kW |
| Warranty | Cylinder 7 (domestic) |
Specs from: Rheem New Zealand product page (rheem.co.nz, A551180C5). Official product page →
Sold in New Zealand
NZ has no equivalent to the Australian STC/VEEC/ESC certificate schemes, so no dollar rebate applies to this model. Its confirmed AU-market equivalent is registered and shown above.
What customers say
Sourced from EnergyAE's HPWH customer-sentiment dataset (public review sites and forums). A small, self-selected sample — not a representative survey.
“Very quiet compared to my central heating heatpump!!”
andysh · Geekzone
The Rheem AmbiPower MDc-180 (A551180C5) is an all-in-one heat pump water heater with a 178 L tank, recommended for upgrading small to medium electric water heaters. It has a declared COP of 4.9 at 19 degrees C ambient, drawing 683 W of rated power input, and operates from -7 to 43 degrees C ambient. The unit measures 576 mm wide, 532 mm deep and 1810 mm tall, weighing approximately 116 kg empty.
A 2.4 kW electric backup element is fitted. This appears to be the same AmbiPower MDc-180 product line registered in Australia under the code 551D180 - brand, model name and the -7 to 43 degree C ambient range all match exactly - though the NZ page states a slightly different tank volume (178 L vs 180 L) and a higher COP (4.9 vs 4.5 declared for the AU unit), which may reflect a later product revision rather than a different physical unit.
Rheem NZ warrants the cylinder for 7 years on domestic installations.
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