Frieght Charges may apply. 


Top 5 Benefits of Econergy

1. Proven heat pump technology for continuous hot water and maximum efficiency

Econergy heat pump water heaters are the latest innovation in home water heating. Using proven heat pump water heater technology, the Econergy water heater transfers energy from the surrounding air to heat your homes hot water at a fraction of the cost of an electric element. Our customers are enjoying savings of up to 75%* for this form of solar water heating.

2. Future proof your home against rising energy costs

Electricity is becoming more and more expensive. The best option to reduce household costs is to become more efficient and use less energy which is exactly what the Econergy heat pump water heater system does.

3. Get usable hot water faster

Unlike conventional gas or hot water cylinders, the Econergy heat pump water heater uses innovative new technology to heat the tank from the top down. Econergy revolutionary top down heating technology provides you with continuous hot water faster from a cold tank. There’s no need to wait hours until you get usable hot water.

4. Built for New Zealand conditions

Econergy heat pump water heaters are New Zealand designed and built specific for our house designs and weather conditions to give you the best possible performance. The product comes with a guaranteed minimum 6-year performance warranty at a minimum 66% savings level, fully supported by our New Zealand manufacturing facility and our authorised installers.

5. Compare with a solar water heater

Quote from EECA Energywise

“Heat pump water heaters are another product on the market and are a form of indirect solar water heating. The sun heats the air around your home each day, and a heat pump water heater shifts some of this heat from the outside air into you hot water. They generally work as well, if not better than solar water heaters, supplying on average $3 of hot water for every $1 of electricity they use.

Heat pump water heaters are also effective in situations where solar water heating is not suitable, such as: houses that don’t get direct sun during the day, or a house where it would be particularly expensive to install a solar hot water system.”

6. Retrofit or new construction

The Econergy heat pump water heater is an easy retrofit to your existing hot water cylinder or is installed by preference as part of a renovation or building project. If you’re building or renovating or just want to reduce your power bills be sure to ask for Econergy.


$4,999.00 Regular Price
$3,949.00Sale Price
  • Calculate your savings

    Enter your average monthly power cost:


    Your likely monthly savings

    $ 50

    Low hot water use

    $ 60

    High hot water use

    Your likely yearly savings

    $ 600

    Low hot water use

    $ 720


    Model HP4000LT heat pump water heater
    Household size 2-8 person household
    Rated heat output 3.5 kW
    Efficiency (COP) 3.8
    Min Water Pressure 50kPa
    Minimum HP operating temperature -4°C
    Dimensions 520mm H x 490mm W x 550mm D
    Weight 50kg
    Water inlet/outlet RP ½”/15mm
    Noise rating 52dBa @ 1.5m
    Electrical Connection 10A/ 230V



    Why install an Econergy® heat pump water heater? Split system design We all like a decent shower or soak in a hot bath…until the power bill arrives. Water heating accounts for around 40% of household energy use, while energy costs continue to rise. Extremely effi cient Econergy® water heaters solve the problem of rising energy costs by transferring up to 75% of the heating energy from the air.* This is achieved by the application of revolutionary patented technology that heats the water in a single pass. Econergy® running costs have been independently shown to be amongst the lowest of any system, up to 75% less than electric hot water cylinders and around 40% less than natural gas! Econergy® heat pump water heaters are designed to cover the range of hot water needs of New Zealand homes. Each unit is easily connected to an existing hot water cylinder or Econergy® heat pump ready cylinder via insulated water pipes and dual interconnect cables. *Pre-pipe pre wire between heat pump and cylinder, 2 x 15mm plumbing pipes, 1 X CAT5 / CAT6 Cable, 1 x 2.5mm TPS Cable *HP4000LT, savings guarantee compared with standard electric hot water cylinder. Valid where Econergy® installed to specifi cations listed in installation manual. Econergy’s top down heating principle, together with generous capacity, maximises hot water supply even during periods of high use. Econergy’s new range of heat pump optimised storage cylinders ensure high fl ow rates are achieved. This allows the whole house to be run simultaneously off one system. Perfect for the demands of modern living, contact us now and fi nd out why Econergy® is trusted by thousands of homes nationwide. * HP4000LT, 73.8% annual savings with electric hot water cylinder, Zone 5, Project Solar AS/NZS 4234 and AS/NZS 5125. Econergy® HP4000LT Natural Gas Instantaneous Natural Gas Storage LPG Storage 1400 1600 1200 1000 800 600 400 200 0 GUARANTEED 66% OFF YOUR HOT WATER BILLS* CONNECTS TO NEW & EXISTING HOT WATER CYLINDERS HOT WATER SYSTEMS - RUNNING COSTS PER YEAR LPG Instantaneous Electric Storage Source: Average Yearly Running costs calculated from of EECA online calculator. User interface & microprocessor control The Econergy® heat pump water heater is intelligently controlled via a microprocessor located in the unit ensuring the most effective performance under all conditions. Additionally, it is designed to work with the new generation of solar panels. Each Econergy® system is supplied with a simple user interface, with the following features: • Indicates running status of the heat pump unit • Allows manual changeover between the heat pump and the electric element • ‘Solar mode’ built in Up to 9m Pipe Run Maximum fl exibility Econergy® - New Zealand’s most effi cient water heater The Effi ciency and Hot Water Recovery Rate graph shows if it is 20°C outside the red line indicates a recovery rate of almost 75L per hour. The blue line indicates a co-effi cient performance of over 4 (400%). This means for every unit of electricity consumed by the heat pump you get 4 units of heat energy delivered to your cylinder. New Zealand’s air temperature tends to be cooler. At 12°C the graph indicates a recovery rate of 60L per hour and a co-effi cient performance of over 3.5 (350%). At this rate every unit of electricity used by the heat pump provides 3.5 units of heat energy delivered to your cylinder. -5 0 5 10 15 20 25 30 0 0 1 25 2 50 3 75 4 100 5 125 Ambient Temperature °C Litres / hour at 45°C Rise COP EFFICIENCY (COP) HOT WATER RECOVERY RATE HP4000LT ECONERGY® ABC 0 0.1 0.2 0.3 0.4 0.5 Source: EECA independent test data 31 May 2011 ENERGY CONSUMPTION ( ) ZONE 5 - North Island, excludes Taupo region ZONE 6 - South Island, and Taupo region ANNUAL ENERGY CONSUMPTION MARKET COMPARISION EFFICIENCY (COP) HOT WATER RECOVERY RATE • The only heat pump water heater given the tick by Consumer – highest savings on the NZ market • Patented Single Pass technology for maximum durability and savings • Epoxy coated evaporator, powder coated aluminum base and stainless steel fasteners give highest durability in NZ conditions • Each unit is tested through several heating cycles before leaving our Auckland factory • Full heat pump operation right down to -5˚C, without boosting from an electric element 550 400 400 490 100 750 1500 min 200 Ø 488 / 580 Ø 488 / 580 C 1596 EC250l B 1770 EC180L A 1846 EC300L 610 490 200 100 plinth height: 100 plinth height: 100 min. distance from wall min. distance from wall min. distance from wall installed unit height: 610 min. distance from wall hot water cupboard 488 / 580 650 600 400 400 min. distance from wall 200 200 min. height required AIRFLOW AIRFLOW to remove unit: 910 min. distance from wall Flexibility of placement Installation dimensions TYPICAL PLAN INDOOR HOT WATER CYLINDER TYPICAL PLAN OUTDOOR HOT WATER CYLINDER The Econergy® system can be mounted fl exibly to suit the house design and layout. The hot water cylinder may be mounted internally or externally. The Econergy® heat pump unit may be mounted outside the building envelope, or in the ceiling cavity. Econergy® recommends indoor mounting of hot water cylinders wherever possible to reduce heat loss from the cylinder and allow proximity to point of use. Econergy® hot water heaters can also be mounted outside where inside space is limited. NOTE: Refer to installation manual for detailed instructions. Specifi cations - Heat Pump Water Heaters *Specifi cations are subject to change at anytime




    High hot water use

Useful Links

Product Search

Contact Us

Office Hours: Mon - Fri 8:00am - 5:00pm

Business Hours: 24 Hours / 7 Days

Call Free: 0508 367 468



Urgent Bookings / Quotes

0508 367 468 





Bay Of Plenty



Mailing List

Copyright Protected by The Hot Water Company Limited.
The Hot Water Company Logo including images of Rheem Hot water Cylinders.

Hot Water Help Line

24hours - 7 Days

0508 367 468