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Econergy HP4000LT Heat Pump Water Heater

$4,343.48 excl. GST.

  • Maximise your savings with Econergy 4000LT’s advanced heat pump technology.
  • This heat pump water heater is designed for peak performance to meets your hot water needs.
  • Experience significant cost savings with Econergy 4000LT while reducing your carbon footprint.
  • 3.5kW, ideal for a 2-8 person household

The Econergy 4000LT Heat Pump Water Heater combines efficiency, reliability, and sustainability, making it the perfect choice for modern households seeking an advanced hot water solution. Upgrade to the Econergy 4000LT Heat Pump Water Heater today. Call us on 0800 278 288 to make the next step and transform your home’s hot water system.

Split system design = Maximum flexibility with the HP4000LT

Designed for New Zealand conditions, Econergy heat pump water heaters are optimised to meet the hot water needs of your household. Our highly skilled team at Aqua Works, with their in-depth knowledge and experience, ensures a seamless connection to your existing hot water cylinder. Alternatively, our certified plumbers can quickly join it to an Econergy heat pump-ready cylinder using dual interconnect and cables insulated water pipes. Our local background and expertise make the installation process straightforward and efficient, providing reliable hot water without hassle.

Don’t miss out on this opportunity to revolutionise your home’s hot water system. Call us now at 0800 AQUA WORKS and experience the difference.

High energy efficiency: Harness the power of heat pump technology with Econergy

The Econergy HP4000LT Heat Pump Water Heater utilises advanced heat pump technology to maximise energy savings. Extracting heat from the air and transferring it to the water significantly reduces electricity consumption compared to traditional electric water heaters. This efficiency lowers your energy bills and lessens your environmental impact.

Always hot, always ready: Econergy 4000LT ensures consistent hot water supply

Trust the reliable performance of the Econergy HP4000LT Heat Pump Water Heater. A hot water heater that you can count on a consistent hot water supply. Designed to meet the demands of busy households, this system ensures you never experience a shortage, even during peak usage times, providing peace of mind and uninterrupted comfort.

Greener solutions with Econergy 4000LT's low emissions

Econergy takes a stand for sustainability with the 4000LT model. The system's eco-friendly components and low greenhouse gas emissions make it a responsible choice for those looking to reduce their carbon footprint while enjoying the benefits of modern hot water technology, instilling a sense of environmental responsibility.

Built to last: The durability of Econergy HP4000LT Heat Pump Water Heater

Constructed with premium materials, the Econergy 4000LT is built to last. Its robust design ensures long-term reliability and performance, meaning you can trust it to deliver hot water efficiently for years to come. This provides reassurance and minimises the need for frequent replacements.

Smart investment: Econergy 4000LT offers long-term savings

Invest in the Econergy 4000LT and start saving on your utility bills. This system is designed to reduce energy consumption, offsetting the initial investment with long-term savings on electricity costs. It is a financially sound choice for any household looking to economise without compromising comfort.

Experience tranquility with Econergy 4000LT's quiet operation

Unlike some water heaters, which can be noisy and disruptive, the Econergy 4000LT heat pump water heater operates quietly. This feature ensures you can enjoy hot water without background noise, maintaining a peaceful and serene home environment.

Effortless monitoring: Smart control features of Econergy 4000LT

The Econergy 4000LT is equipped with smart technology, which allows you to monitor and control the system easily. This user-friendly feature ensures optimal performance and convenience, enabling you to adjust settings to suit your specific needs and preferences.

Make a smart choice for reliable, efficient delivered hot water

Transform your home's hot water experience with the Econergy 4000LT Heat Pump Water Heater. Enjoy unparalleled energy efficiency, reliable performance, and significant cost savings, all while reducing your carbon footprint. Relish in the quiet operation and intelligent control features that make your life easier and more comfortable.

Don't wait any longer to upgrade to the perfect hot water solution. Let us bring the advanced benefits of the Econergy 4000LT to your home. Our certified MASTER Plumbers are happy to discuss your options. Call us now at 0800 AQUA WORKS and get a free quote.


Econergy HP4000LT heat pump water heater

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

Compare Models

Econergy HP400LT

  • Ideal for Small Households: The HP400LT is perfect for smaller homes or secondary water heating needs. It provides sufficient hot water without overloading your system.
  • Basic Features: This model offers good energy efficiency and reliability but lacks the advanced smart controls of the THD3500.
  • Budget-Friendly: It’s a more affordable option for those who need a dependable water heater without the extra features.


Econergy TH 260D1

  • Enhanced Efficiency: The TH 260D1 is more energy efficient than the HP400LT, making it suitable for medium-sized households.
  • Intermediate Features: While it doesn’t have the advanced smart controls of the THD3500, it offers more features than the HP400LT, striking a balance between cost and functionality.
  • Cost-Effective: It provides a good balance between price and performance, making it a solid choice for those looking for enhanced efficiency without the higher price tag of the THD3500.


Econergy THD3500

  • Top-of-the-Line Performance: The THD3500 is the most advanced model, offering superior energy efficiency and performance. It’s ideal for larger households or those wanting the best modern heating technology.
  • Smart Controls: This model features innovative smart control capabilities, allowing you to manage the heating system remotely, schedule heating times, and monitor energy usage from your smartphone. This ensures convenience and energy savings.
  • Eco-Friendly and Reliable: Built with high-quality components, the THD3500 is designed to last and handle various weather conditions. It’s also eco-friendly, helping reduce your carbon footprint.
  • Investment-Worthy: Though it comes with a higher price tag, the THD3500 often qualifies for various rebates and incentives, reducing the overall cost of installation and operation.



  • HP400LT: This model is recommended if you have a smaller home, need a secondary water heater, or are looking for a budget-friendly option.
  • TH 260D1: Opt for this model if you want a balance between cost and performance, suitable for medium-sized households with better energy efficiency than the HP400LT.
  • THD3500: This is the best choice if you want top-tier performance, smart control features, eco-friendliness and are willing to invest more upfront for long-term savings and convenience.


Consider your household size, budget, and desired features to choose the best model.

Download Documents

Econergy HP4000LT User Manual 2022

Econergy User Manual 2022

Econergy Parts and Labour Warranty

Econergy Parts & Labour Warranty