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.
Complete Installation Kit - Decentralised Heat Recovery Ventilation System
The Stiebel Eltron VLR 70 S is a decentralised ventilation unit with heat recovery for ventilating rooms, apartments and small commercial properties.
It has a contemporary design with a separate programming unit, and 1-pair can be used for floor areas up to approx. 70m2.
These units only function in pairs because they work in alternate operation, i.e. when one unit operates in supply air mode providing fresh air to the room, the other unit operates simultaneously in extract air mode - exhausting stale air from the room. This means that the total supply air flow rate is always equal to the total extract air flow rate.
The air direction is changed approx. every 40 seconds at each unit. In extract air mode, the internal heat exchanger absorbs the majority of the thermal energy from the extracted indoor air. Once the fan has switched to supply air mode after 40 seconds, the heat exchanger transfers the stored thermal energy to the inflowing fresh air from outside.
Each unit has 2 filters each: a filter on the fresh air supply outside the building reduces the penetration of dust and other suspended matter. A filter inside the building reduces contamination of the appliance from the stale exhaust air.
This installation kit comes with all the parts and materials required for installation - such as ducts, tape, hanging straps, controller, and the decentralised VLR 70 S unit - allowing you to complete the installation without missing any pieces.
To make sure you get the most out of your HRV system we offer a free design service (see below for details), which shows you exactly where to position the central unit, the distribution boxes, and all inlets, outlets and vents.
Features
- Energy efficient with up to 92% heat recovery (save on your heating/cooling bills)
- Designed for air flow rate of 10 - 70m3/h for 1-pair (suitable for small homes and apartments)
- Decentralised ventilation (easy installation into new or existing buildings)
- Quiet operation (wont disturb you or your family because it's works whisper quiet)
- Low power operation (super low running costs)
- Replaces indoor air with filtered fresh air from outside (great for your comfort, keeps the house feeling fresh)
- Pollutants are removed from indoors (extracts harmful chemicals or pathogens and provides fresh clean air for you and your family to breathe)
- Prevents dust and pollen build up (great for asthma sufferers and people with allergies)
- Prevents condensation and mould through improved ventilation (keep your family safe from harmful mould, and stop costly building maintenance issues from condensation build up)
- Easily accessible design for filter replacement (replace the filter yourself when the system tells you to)
- Set Heat-Recovery mode or Cross-Ventilation mode (cross-ventilation mode allows the units to purge your house of air - useful in summer when the night time air is cooler than the air inside the home)
- Use VLR controller (set the operating mode and automatically alerts you when it's time to change the filters)
Description
Includes an axial fan with rigid fan curve, for use even in areas which are exposed to wind. Built with an efficient aluminium heat exchanger and rain-resistant external panel. Straightforward filter replacement using the easy to remove fan unit. Fine dust filter available as an accessory. White powder-coated stainless steel external panel. Matt white plastic internal panel. Latest EC fan ensures efficient operation.
Installation in round or square wall outlets with a maximum wall thickness of 300mm. Easily accessible electrical connection on the inside of the fan unit.
Up to 8 units can be connected and operate together to service larger areas/multiple rooms.
Kit Contents
This complete installation kit comes with:
- 1x pair (2 units) of Stiebel Eltron VLR 70 S in-wall decentralised HRV units
- 1x system power supply
- 1x VLR controller
How Quiet Are the VLR 70 S Units?
The VLR 70 S units are very quiet, though not completely silent. For this reason, it’s best not to install them in areas where total silence is expected, such as directly above a bedhead. Ideally, the units should be placed at least 2–3 meters away from the bed.
(If installed in a bedroom, the units can still operate effectively even with the door closed (assuming a typical door gap of about 15mm). However, a larger gap under the door is recommended for improved airflow.)
The VLR 70 S units have a noise level rating of 35 dB(A). For reference, here’s a decibel comparison table to help you gauge the sound level...
Learn More: Ventilation Knowledge
Short Article by Renew Magazine -> Fresh air without the heat loss (or gain)
Short Article by Renew Magazine -> MVHR buyer's guide
Short Article by Stiebel Eltron -> The Importance of Ventilation
Short Article by Stiebel Eltron -> Prevent Mould In Your Home Through Improved Ventilation
Short Article by Stiebel Eltron -> Passive House Principles and Components in Australia
Informative Webpage -> Healthy Home Ventilation
Short Videos -> HRV explained by Stiebel Eltron:
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. If you request the design before purchasing, a $179 fee applies. This fee will be refunded upon payment for the product order.
- 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.
Additional Products
- Replacement Filters for all Stiebel Eltron HRV units available at Stiebel Store
- Installation of this HRV system (Perth only) from $1,156.00+GST by Euroheat Australia
Technical Data
| Model number | VLR 70 S |
| Power consumption | 7W each unit |
| Rated voltage | 240V supply / 24V fan |
| Air volume flow | 10 - 70m3/h each pair |
| IP Rating | IP21 |
| Operating temp. range | -14°C to +40°C |
| Filter class | F7 + G2 |
| Wall penetration size | 180 - 200mm square |
| Wall thickness | 100 - 300mm |
| Weight | 5.2kg |
| Height | 285mm |
| Width | 360mm |
| Depth | 590mm |
| Sound pressure level (EN 12102) | 35 dB(A) at 20 m3/h |
Product Videos
Stiebel Eltron VLR installation video:
Stiebel Eltron VLR filter replacement video:
Downloads
VLR 70 S Data Sheet PDF 879.96 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
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.
At our parent company Euroheat Australia we’ve been engineering, installing, and servicing heating, cooling, hot water, and ventilation equipment for 30+ years. And since we’ve used them and know which products work best, the EnergyLabs promise is simple: what you get has passed the test.
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