30+ years of experience

Complete DIY Installation Kits for Heat Recovery Ventilation

Now you can capture and reuse the heat/chill you’ve already paid for… using one of EnergyLabs’ DIY* complete and easy installation kits (*with the help of any licenced electrician).

How?

EnergyLabs offers Complete Heat Recovery Ventilation Kits – making it easy for you to install (with no missing parts) and get your heat recovery ventilation system up and running:

For habitable floor areas of up to 70m2 choose the 2-units kit. For areas of up to 140m2 choose the 4-units kit, up to 210m2 choose the 6-units kit and up to 280m2 choose the 8-units kit.

Not sure and want expert help? Get our expert design service ($179), send us your house plans and we’ll prepare a custom design of your heat recovery ventilation system for best performance, including a detailed list of parts and complete with pricing.

LARGE Hot Water Heat Pump STIEBEL ELTRON WWK 302

Store/Hot Water/Hot Water Heat Pumps

Product Details

High Efficiency Hot Water Heat Pump

The WWK Hot Water Heat Pump is proving to be one of the most efficient water pumps on the market providing high energy cost savings and environmentally friendly hot water all year round. This hot water heat pump technology has been tried and tested in Germany for over forty years to ensure consumers receive real energy, environmental, and money savings.

The WWK heat pumps are the lowest current drawing heat pumps on the market at only 2.3 Amps. It's highly energy efficient operation saves up to 74% on hot water energy use compared to a traditional electric hot water tank. The heat pump is Solar PV compatible can be operated on extended off-peak power and timers. The well insulated tank minimises heat losses to the outside air and therefore requires less re-heating of the water (costing you less $$$).

The WWK heat pumps have an additional special function: they can receive a signal from your solar PV system via an external signal. When this signal is sent from the solar PV inverter to the heat pump, the unit will increase the use of solar energy by raising the tank temperature - thereby banking energy now for use later.

To protect against corrosion, the heat pump cylinder is coated internally with special enamel and is equipped with a non-sacrificial current impressed anode. This means that the heat pumps are designed to work in hard and soft water areas, and therefore have a long lifespan.

Significant Government Rebates Available - up to $1200 depending on where you live and the market price for STCs - check how much you can get back here:

www.stiebel-eltron.com.au/rebates

Stiebel Eltron has been providing energy-efficient air source hot water pumps for both the commercial and residential markets Australia wide since 1996, and has rapidly been transformed into a household name synonymous with high-quality, well-engineered and energy-efficient products. As early as 1976 Stiebel Eltron began developing heat pump technology for energy efficient hot water.

Features

German engineered and European made (guaranteeing you an efficient and reliable product)
Designed for Australian conditions (operates automatically between -5°C and 42°C)
Super quiet operation with additionally encased compressor design (stopping generated noise from escaping)
Suitable for hard or soft water areas, and includes maintenance free anode (current impressed anode saves you $$$ in the long run because no maintenance required)
Unique 'roll bond condenser' technology for optimal heat transfer (transfers the generated heat more effectively to the water in the tank)
Active defrost function maintains operation in cold climates automatically (meaning you never have to worry about going outside in the cold)
Single piece design (makes installation quick and easy)
Ideal to operate with solar PV system (for additional $$$ savings)

Description

Maximum of 540 litres of 40°C water supplied in first hour of draw down (never run out of shower hot water)
Suitable for a 5 - 6 person home (suitable for a medium size household)
Maximum 65 degree Celsius hot water supply temperature (hot enough for all household requirements)
Very High Efficiency: Coefficient of Production (seasonal average) of 3.58 (for every 1.0kW of power input, you get back on average 3.58kW of heat)
'H' model includes a 'Smart Element' (automatically works as a backup booster should you ever need it)
Can be connected to a smart inverter to take advantage of solar PV power production (stores additional heat in the tank, turning it into a thermal battery)
Domestic Use Warranty: 5 years on cylinder and condenser, 2 years for refrigeration and electrical (not recommended for commercial use)

Kit Contents

Included in Kit:

Heat pump unit (plug-and-play) with heavy duty power lead

Required on-site according to installation type:

Cold Water Feed Isolation Valve
Expansion Control Valve
Tempering/Thermostatic Mixing Valve

Learn More: Hot Water Heat Pump Knowledge

Calculator by Stiebel Eltron -> WWK selection and comparative savings

Short Article by Stiebel Eltron -> Connecting your WWK to Solar PV

Video by Stiebel Eltron -> How does a heat pump work?:

FAQ

What else do I need to complete the installation? Generally all that's required is a power point and somewhere to drain a bit of condensation from in the unit... apart from this, nothing, we send out a complete kit that can be installed immediately. Please note that to comply with regulations some installation types may require additional valves (see above in Kit Contents).
What is the warranty on the hot water heat pump? Stiebel Eltron provides a 5-year warranty on the tank and condenser, and 2 years on the refrigeration and electrical components. Please note the warranty is valid for domestic installations only.
How do I know where to install the heat pump? Heat pumps need to breath! Because they harvest heat from the air, they need access to lots of it. Generally we would recommend installing the heat pump outside, with the discharge vent of the heat pump not facing into the prevailing wind, and additionally not bouncing off a fence or wall and making its way into the air intake vent (this lowers the unit efficiency dramatically). We recommend internal installations only where there is a really large amount of air volume in the space. Stiebel Eltron recommends a minimum room size of 13 cubic metres, however, please not the temperature within an installation room of this size will drop by ~4°C when the heat pump is extracting heat from the air (so the larger the room, the better).
What's the difference between the standard WWK 222/302 heat pump and the H-models? The WWK 222/302 H hot water heat pumps have a smart element situated in the top of the hot water cylinder. This smart element will switch on along with the heat pump function when a high volume of hot water is drawn off from the hot water tank. This smart element will assist the heat pump to heat approximately the top 80 litres. This smart element function is designed to aid hot water recovery for high use of hot water.
Can the WWK be used for floor and radiator hydronic heating? The WWK range of heat pumps are not designed for room heating applications. The main reason is that the heat pump will eventually fail with warm return water continually entering the cold water inlet - the WWK heat pumps are designed to work with cold water only (10-20°C).
What happens after I order the unit and pay? We will be in contact with you to confirm the order, delivery address and timeframe, and any other questions you may have.
How long until I receive my order, and is there a delivery fee? Within Australian state/territory capital cities delivery is free (excluding Darwin), and your order will usually arrive within 3 business days. For orders outside of capital cities, we offer a flat-rate fee of $200 for delivery.

Additional Products

Technical Data

Model number	WWK 222	WWK 222 H	WWK 302	WWK 302 H
Power consumption heat pump (EN16147 / A15)	0.55kW	0.55kW	0.55kW	0.55kW
Power consumption smart element	-	1.7kW	-	1.7kW
Rated Capacity	220L	220L	302L	302L
Maximum available amount of hot water at 40°C	360L	360L	540L	540L
Set hot water temperature	61°C	61°C	61°C	61°C
Max. hot water temperature	65°C	65°C	65°C	65°C
Operating temperature range	-5 to 42°C	-5 to 42°C	-5 to 42°C	-5 to 42°C
COP (*seasonal average)	3.94	3.94	3.58	3.58
Air flow rate	550m3/h	550m3/h	550m3/h	550m3/h
Rated voltage	240V	240V	240V	240V
Max. operating current	3.18A	9.70A	3.18A	9.70A
Refrigerant	R134a	R134a	R134a	R134a
Height (adjustable feet)	1553-1569mm	1553-1569mm	1921-1937mm	1921-1937mm
Diameter	690mm	690mm	690mm	690mm
Weight (empty / filled)	120/340Kg	120/340Kg	135/437Kg	135/437Kg
Sound pressure level at 1.0m in free field (EN 12102)	45 dB(A)	45 dB(A)	45 dB(A)	45 dB(A)

Downloads

WWK Data Sheet PDF 2.15 MB

WWK 222 & 302 Operation and Installation Guide PDF 6.77 MB

WWK Operation & Installation Guide - 2020 Digital LCD Controller Model PDF 9.33 MB

WWK 222(H) / WWK 302(H) Warranty PDF 110.68 kB

STIEBEL ELTRON Brochure WWK PDF 3.70 MB

STIEBEL ELTRON Tech Line Drawing WWK 222 PNG 603.19 kB

STIEBEL ELTRON Tech Line Drawing WWK302 PNG 635.13 kB

This is

When do DIY Installation Kits make sense and why

Why is it easy to install?

You don’t need any ducts – you will get a few in-wall units which talk to each other and simultaneously extract stale air and supply fresh air into the room, while recovering as much energy as possible during the process.

Decentralised heat recovery ventilation solutions are ideal for retrofitting to existing buildings, or new buildings that have minimal ceiling or roof space available. This is because with a decentralised system there are no ducts to run – there are simply a few in-wall units which talk to each other and simultaneously extract stale air and supply fresh air into the room, while recovering as much energy as possible during the process.

How is the EnergyLabs’ Complete Heat Recovery Ventilation Kit different to standard ventilation?

There are two main types of ventilation systems in Australian buildings: extraction-only air systems and supply/extract air systems.

The simplest and cheapest method for ventilation is an extraction-only air system. This is the system you will recognise from almost all houses in Australia – unwanted air is removed via ducts from areas such as the kitchen, bathroom and toilet. But the air that is extracted and pushed out from the building must then be replaced somehow… and this replacement air from outside has traditionally just seeped its way into the building via the small openings and cracks around windows, doors, ceiling & roof, etc.

Now in theory this simple and cheap way works, but the air that is getting sucked into the house through all the openings and cracks is costing us money. In winter this air is cold, and therefore we have to pay to heat it up… and the same is true in summer – the air coming in is hot, and we have to pay to cool it down.

But unlike an extraction-air system, a supply/extract system first strips the unwanted extract air of its thermal energy, and then it transfers the majority of this energy to the fresh air that is being supplied into the building. And to achieve this a pair (or pairs) of decentralised heat recovery ventilation units can help you.

How does the whole EnergyLabs’ Complete Heat Recovery Ventilation Kit work? (and why it will save you money)

For example in winter the outside air may be 7°C, but inside your home it’s a comfortable 21°C. A simple extraction-only air system would exhaust to the outside 21°C air from your house, and then draw in 7°C air from outside… which can be uncomfortable for those inside, but most of all costs you money to heat up this cold air to 21°C again.

However, a supply/extract air system would in this situation extract the heat from the stale 21°C air first, and only then exhaust it at ~9°C. The fresh incoming cold air from outside would be at 7°C before it passes through the special crossflow heat exchanger, but then it’s supplied into your home at 19°C… meaning you don’t experience discomfort and you dramatically save on your heating bills, while having high quality (and filtered) fresh air supplied throughout your home.

It’s important to remember that heat recovery ventilation systems do not actively heat or cool your home – they only help you keep more of the energy you already have in your home while enjoying clean fresh air and minimising your energy bills. (Some HRV systems do however have night purge, which during summer allows you to pump out any warm air from inside your home, and replace it with cool night air)

When to get the EnergyLabs’ Complete Heat Recovery Ventilation Kit

For people that like that fresh and clean air in their homes 24hrs/day, 365days/yr (without having to manually oipen/close windows all the time)
When you want an energy efficient home that doesn’t waste energy (and you don’t want to pay for wasted energy either)
When you have an air-tight home that requires fresh air supply (to keep O2 levels right, and minimise CO2 and other pollutant build-up)
For people and families that suffer from asthma and allergies (the fresh air is filtered before it enters your home)
When you want to reduce the potential of mould and other pathogens (replacing the air within the building and reducing moisture build-up)

FAQ

What else do I need to complete the installation? Apart from some screws, power, and some low voltage cabling between the units and controller, nothing extra is required, we send out a complete kit that can be installed immediately.

What is the warranty on the HRV unit and the system? Stiebel Eltron provides a 2-year warranty on all components supplied.

How do I know where to put the vents and install the different system parts? We offer a free design service with every purchase – just supply us with your building plans and we send you back the design.

What happens after I order the unit and pay? We will be in contact with you to confirm the order, delivery address and timeframe, system design (if required), and any other questions you may have.

How long until I receive my order, and is there a delivery fee? Within Australian state/territory capital cities delivery is free (excluding Darwin), and your order will usually arrive within 5 business days. For orders outside of capital cities, we offer a flat-rate fee of $200 for delivery.