Mitsubishi Electric hot water systems

Hot Water Heat Pumps

Efficient hot water upgrades for homes across the Holmes Services area.

A smarter way to heat water

Hot water is one of the big energy users in a home. A well-specified hot water heat pump uses heat pump technology to move warmth from the outdoor air into your hot water system, instead of relying only on a standard electric element or gas burner.

Holmes Services can help homeowners assess whether a Mitsubishi Electric AquaCore or Ecodan hot water heat pump setup is a good fit for the property, the existing cylinder, household demand and installation location.

  • Electric cylinder upgrades
  • Gas hot water replacement
  • Existing cylinder assessments
  • New cylinders and renovations
  • Larger household hot water demand
  • Outdoor unit placement advice

Quick energy-cost comparison

A standard electric cylinder creates heat directly from electricity. A hot water heat pump uses electricity mainly to move heat, which is why Mitsubishi Electric promotes AquaCore as able to reduce hot water energy costs by up to 80 percent, depending on use, energy pricing, installation and outdoor conditions.

Standard electric cylinder
100%
AquaCore hot water heat pump
Up to 80% less

Indicative comparison based on Mitsubishi Electric / BDT AquaCore savings claims. Actual results vary by home and setup.

AquaCore domestic hot water

Mitsubishi Electric AquaCore

AquaCore is Mitsubishi Electric's domestic hot water heat pump solution for New Zealand homes. It is designed to work with a suitable existing or new electric hot water cylinder, using an outdoor heat pump unit, an indoor heat exchanger and the cylinder itself.

For the right home, AquaCore can be a strong option when you want lower running costs without automatically replacing every part of the hot water system.

Product details reference Mitsubishi Electric / Black Diamond Technologies AquaCore material.

Ecodan and the wider hot water heat pump range

Mitsubishi Electric also uses the Ecodan name for air-to-water heat pump systems that can support domestic hot water and hydronic heating applications such as underfloor heating, radiators, fan coils, pools and spas.

For Holmes Services, the practical starting point is simple: what are you trying to heat, how much hot water does the home actually use, and what system will fit the site cleanly? From there we can help narrow the right Mitsubishi Electric pathway.

Mitsubishi Electric Hot Water Heat Pump Options

Every home has different hot water demands, but these are some of the Mitsubishi Electric systems commonly specified for New Zealand residential applications.

Energy Efficient Hot Water

AquaCore Hot Water Heat Pump

A split-style hot water heat pump designed for New Zealand homes, including retrofit situations where a suitable existing electric cylinder may be retained.

Whole-Home Solution

Ecodan Hot Water Heat Pumps

Mitsubishi Electric's broader air-to-water heat pump range for hot water and hydronic heating applications.

Medium Household Demand

PUZ-SHW80VAA

Referenced by Mitsubishi Electric in Ecodan performance information. Suitability depends on design conditions, flow temperature and the home's requirements.

Higher Household Demand

PUZ-SHWM100VAA

Referenced by Mitsubishi Electric for cold-climate performance. We can confirm whether this class of system is appropriate after assessing the property.

Why use Holmes Services for hot water heat pumps?

A hot water heat pump is more than just a cylinder replacement. Performance depends on the right system, the right location, adequate airflow and a well-planned installation. We help homeowners understand the options, assess site suitability and install systems designed to deliver efficient, reliable hot water for years to come.

  1. Assessment - review cylinder condition, household demand and installation space.
  2. Recommendation - compare AquaCore, Ecodan or other suitable approaches.
  3. Installation planning - confirm outdoor unit location, pipe routes and trade requirements.
  4. Commissioning - check operation, settings and owner handover.

Ask about hot water heat pumps

Frequently asked questions

Can I keep my existing hot water cylinder?

Possibly. AquaCore is promoted as being able to work with a suitable existing electric cylinder, but the cylinder needs to be assessed for condition, size, plumbing, access and compliance.

Can a hot water heat pump replace gas hot water?

Yes, in many homes. The best approach depends on the current gas setup, daily hot water use, cylinder requirements and where the outdoor unit can be placed.

Is AquaCore different from an all-in-one hot water heat pump?

Yes. AquaCore uses separate components rather than mounting the whole heat pump directly onto the cylinder. This can give more flexibility around cylinder use, outdoor unit placement and winter performance.

Does a hot water heat pump work in winter?

Mitsubishi Electric promotes its hot water heat pump systems for New Zealand winter conditions. Correct sizing, airflow and installation design still matter.

Which model should I ask for?

Start with the goal, not the model number. AquaCore, Ecodan, PUZ-SHW80VAA and PUZ-SHWM100VAA are likely, but we would confirm the suitable system after seeing the property.

Planning a hot water upgrade?

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