Heat Recovery Ventilation Your Questions Answered

If you're curious about the ins and outs of your heat recovery ventilation (HRV) system, you've come to the right place. Here, we've compiled a list of common questions about your HRV system and provided clear, concise answers to help you better understand how it works and how to maintain it for optimal performance.

What does my heat recovery ventilation machine do?

An airtight building envelope prevents heat from escaping and minimises energy loss. While this is a great energy-saving strategy, it comes with a crucial challenge – the lack of natural airflow. The solution lies in the implementation of heat recovery ventilation systems. Consistent air circulation is essential for maintaining a healthy indoor environment and preventing issues like mould growth and structural damage.

The machine provides continuous fresh, filtered air to your home while keeping up to 90% of the indoor heat inside. It is as efficient as opening a window but much less expensive.

Do I need to change filters, and how often?

Yes, filters need to be maintained every 3-6 months, depending on the levels of pollution outside. A visual check after three months is recommended to assess how frequently you want to replace your filters. When they are visibly dirty or clogged, either wash them under cold water or order replacements at STIEBEL Store.

Does HRV heat my home?

It does not have an active heating element like an air conditioning system. However, you do not have to open your windows for fresh air, which lets the indoor warmth escape. With this eliminated, the use of traditional heating can be minimised.

What is the summer bypass function?

When the bypass mode is engaged, only the extraction fan of the machine is activated, and the supply fan shut down. The conditions for this are automatically detected by the machine. During warm summer days, it can cause a purge of the warm air in your home. A window should be opened to let cold air into your home.

What is the ongoing maintenance required?
The filters should be checked at least twice a year.

How do I set it up? Do I have to set it up?
The system has been commissioned and is fully operational. It has a 'set and forget' philosophy and no additional installation steps are required. You can familiarise yourself with the wall controller by looking at the Stiebel Eltron Operation and Installation guide.

How do I control the airflow?
You are able to select stages 0-4 on the wall controller. On humidity protection (stage 0), the machine is on standby and will intermittently switch on to lower the relative indoor humidity. At full speed (stage 4), the machine will remove as much stale air as possible.

Can I control the temperature?
HRV systems do not actively change temperatures but maintain the indoor temperature while introducing fresh, filtered air from outside, even on cold winter days.

Is there anything else I can do to improve the air quality in my home?
Your HRV system is equipped with two coarse G4 filters to protect your home from dust, mould, and pollen particles. For enhanced air filtration, you can optionally purchase finer filters at STIEBEL Store.

How much does it cost to run the system?

The VCR 180 MC HRV system consumes as little as 0.72 kWh per day. Depending on your electricity provider, this typically equates to a daily cost of 20 to 30 cents, making it an energy-efficient choice for your home.

We hope these answers have provided you with valuable insights into your HRV system. If you have any more questions or need further assistance, please don't hesitate to contact us or visit our website for additional resources and support. Your comfort and indoor air quality are our top priorities!