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Black Diamond AquaCore Hot Water Heat Pump System for Potable Water Heating
Description

Black Diamond AquaCore is a split domestic hot water heat pump system designed and manufactured in New Zealand for Kiwi homes and businesses. The system uses heat pump technology to efficiently heat potable hot water and can be connected to either a new or many existing mains pressure hot water cylinders, making it suitable for both new installations and retrofit applications.

The AquaCore system includes a Mitsubishi Electric outdoor inverter unit, an indoor AquaCore heat exchanger, and a compatible hot water storage cylinder. The indoor unit transfers heat into the water circuit and feeds heated water into the top of the cylinder to support fast recovery and efficient hot water delivery. The secret to the AquaCore's performance is how quickly it heats the tank up compared to a traditional direct electric element. In fact, because it heats from the top down, even with a mostly cold tank, there will be enough hot water for a quick shower within 15 minutes.

The tank automatically heats up when the temperature drops to 42°C ensuring there will always be hot water when it counts.

Key Features
  • Energy-efficient operation — AquaCore achieves a COP of up to 3.6 under rated conditions, helping reduce domestic hot water running costs compared with traditional direct electric water heating.
  • Fast hot water recovery — Top-down cylinder heating means usable hot water can be available quickly, helping meet the demands of family homes and high-use households.
  • Split system design for flexible installation — The system separates the outdoor unit, indoor AquaCore heat exchanger and hot water cylinder, allowing greater flexibility for placement, servicing and retrofit applications.
  • Compatible with new or existing cylinders — Can be paired with many existing mains pressure hot water cylinders, helping reduce installation disruption and making it suitable for both new builds and retrofit projects.
  • Reliable 62°C hot water production — AquaCore’s patented partial cascade technology is designed to deliver 62°C hot water via the heat pump under normal operating conditions, without relying on the cylinder’s electric element for everyday hot water production.
  • Excellent cold climate performance — Engineered to operate in outdoor temperatures down to -15°C, supporting reliable hot water delivery in colder regions of New Zealand.
  • Improved frost protection — With no outdoor water pipework between the outdoor unit and cylinder, AquaCore reduces the risk associated with exposed external water lines in freezing conditions.
  • Quiet, low-profile outdoor unit — AquaCore’s compact outdoor unit helps reduce visual impact and noise transmission, making it well suited to residential sites where boundary setbacks, neighbouring properties and outdoor unit placement are important considerations.
  • Wi-Fi Control capable — Allows homeowners to monitor tank temperature, manage schedules, activate extra heating cycles and receive fault notifications via the Mitsubishi Electric Wi-Fi Control App.
  • Local technical support — Designed and supported by Black Diamond Technologies in New Zealand, giving specifiers, installers and homeowner’s access to local product knowledge and after-sales support.
Scope of Use
  • Domestic potable hot water heating for New Zealand residential homes.
  • Suitable for new build and retrofit applications.
  • Can be paired with many existing or new mains pressure hot water cylinders, provided the cylinder and system design meet AquaCore requirements.
  • Suitable for homes looking to reduce reliance on traditional electric hot water heating or gas water heating.
  • Designed for New Zealand climate conditions, including colder regions where outdoor temperatures can fall as low as -15°C.
  • Suitable for households with high hot water demand, including families and larger homes.
  • Can be used where homeowners want scheduled hot water operation, off-peak power optimisation or remote control via Wi-Fi Control.
  • Intended to be installed by appropriately qualified plumbing, electrical and refrigeration professionals in accordance with all applicable New Zealand standards, regulations and codes.
Limitations on Use
  • AquaCore must not be installed, serviced, altered, relocated or repaired by the homeowner or end user.
  • Not suitable for installation by unqualified trades. Installation requires appropriately qualified plumbing, electrical and refrigeration professionals.
  • Not suitable for cylinders that do not meet AquaCore water storage cylinder requirements, including suitable insulation, stratification and compatible water connections.
  • The AquaCore unit is an indoor unit should not be installed outside unless with an IP rated rain proof cover. 
  • Refrigerant pipe length and height limits must be followed.
  • Wi-Fi Control requires an ethernet connection from the AquaCore indoor unit to the home’s router.
Statement of Building Code Compliance

When designed, installed and maintained in accordance with Black Diamond Technologies’ installation requirements, the AquaCore system supports compliance with relevant New Zealand Building Code performance requirements, including:

  • NZBC Clause G12 Water Supplies — Supports the supply of heated potable water, including built-in mandatory legionella control operation. The AquaCore carries out a weekly deep disinfect cycle, activating the cylinder electric element as required to ensure tank temperature meets G12 compliance. Compliant with AS/NZS 4020:2018. 
  • NZBC Clause H1 Energy Efficiency — AquaCore supports more energy-efficient domestic hot water heating compared with traditional direct electric water heating, with a COP of up to 3.6 under rated conditions. 

Note: Final compliance depends on the complete hot water system design, cylinder compatibility, installation quality and compliance with all applicable plumbing, electrical, refrigeration and building regulations.

In-Service History

AquaCore technology has been operating in New Zealand homes for over 12 years, with systems installed as far back as 2013 still operating successfully in the field.

Black Diamond Technologies Limited has operated in the New Zealand market for over 45 years and supports its products through a nationwide trained specialist installation network.

Other Performance Attributes

For every 1kW of electrical input energy, the Black Diamond AquaCore Hot Water Heat Pump absorbs freely available heat energy from the outdoor air to provide the home with approximately 3.6kW of heat output.

Compared to typical gas and direct electric heating systems that can have higher running costs with inefficient COPs as low as 0.82*1, Black Diamond AquaCore Hot Water Heat Pump provides a real energy efficient alternative.

*1 Based on manufacturer information for gas instant hot water heater (non-condensing).

Warranty

5 year comprehensive parts and labour warranty.

Documents
Warranty: AquaCore
AquaCore Brochure

Nov 2025

Website

Leaders in providing energy efficient heating, cooling, ventilation and hot water heat pump solutions for both commercial and residential buildings — exclusively distributed by BDT in New Zealand.

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