Econergy HP4000LT Heat Pump Water Heater
$4,343.48 excl. GST
- Econergy’s main heat pump water heater, made in Auckland
- 3.5 kW output, suits households of 2 to 8 people
- Connects to your existing hot water cylinder or an Econergy heat pump-ready cylinder
- Econergy’s tested figure: 73.8% annual energy savings in the North Island
The HP4000LT heats your water with energy from the air, so it uses far less electricity than an electric element. We supply, install and service it across Rodney and North Auckland. Call us on 0800 278 296 for a free site visit and quote.
A split heat pump that works with your cylinder
The HP4000LT is a split system: the heat pump unit connects to your hot water cylinder with insulated pipes and cables, up to 9 metres apart. It can work with your existing cylinder or with an Econergy heat pump-ready cylinder. We check your cylinder is suitable at the site visit.
How much it saves
Econergy’s tested figure for the HP4000LT is 73.8% less energy a year than an electric hot water cylinder in Zone 5 (the North Island, except the Taupō area), and 71.1% in Zone 6, tested to AS/NZS 4234 and AS/NZS 5125. Your actual savings depend on how much hot water you use and your power prices.
Guarantee and warranty
For a single family home, Econergy gives a six-year performance guarantee of at least 66% savings compared with a standard electric hot water cylinder, alongside a six-year parts warranty and three years’ labour, when the system is installed and certified to Econergy’s installation manual. The warranty doesn’t cover damage from hard or corrosive water, so we check your water first: see how your water affects your hot water cylinder.
Winter and tank water
Econergy rates the HP4000LT for air temperatures from -5°C to 40°C, and the electric element takes over if it stays colder than about -4°C. It needs at least 50 kPa of water pressure, so it suits tank water with the right pump.
Compare the range on our Econergy heat pump page, or see all our heat pump water heaters. Call us on 0800 278 296 for a free site visit and quote.
Specifications
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
Compare the Econergy range
| Model | Type | Heat output | Heats about | Efficiency (COP) |
| HP4000LT | Split, connects to a cylinder | 3.5 kW | 67 litres an hour | 3.8 |
| THD3500 | Split, connects to a cylinder, solar mode | 3.0 kW | 57 litres an hour | 3.22 |
| Thermoplus TH-260D1 | All-in-one with a 260 litre cylinder | 2.9 kW | Not stated | 4.4 (EN16147) |
Figures are from the manufacturer’s brochures. The efficiency figures come from different test standards, so they aren’t directly comparable. Econergy’s tested figure for the HP4000LT is 73.8% annual energy savings compared with an electric hot water cylinder in the North Island. We’ll recommend the right model for your household at a free site visit.



