VELUX Ventilation solutions

Make your home more comfortable with a ventilation solution

We all want the best indoor climate in our homes and fresh air is key to making it possible. Imagine that you could trust that the air in your home is the absolute best it can be, regardless of how the weather is outside or which season it is. Fresh air makes you feel better and think clearer, it can even help you sleep more soundly and increase your children’s learning abilities.

VELUX ventilation solutions provide high levels of fresh air and help you keep your home and family healthy all year round - even when you’re asleep or not at home.

A constant supply of fresh air, regardless of the weather

Refresh your room - even with a closed window

With a VELUX roof window, a closed window doesn’t have to mean you cannot get fresh air. All of our roof windows come with a unique ventilation flap, which allows fresh air in, even if the window is closed. We call it background ventilation. This means you can enjoy a healthy indoor climate even if the weather keeps you from opening the window.

Two different ventilation units – both ready for the future

VELUX has two innovative new products that take background ventilation a step further. Below, you can read how you can improve your indoor comfort with VELUX ventilation units.

VELUX balanced ventilation – using the natural air flow

Keep your indoor environment comfortable with a stable, draught-free flow of fresh air through the flap, regardless of outside weather conditions.

Constantly adjusts airflow through the ventilation flap according to wind pressure.
Optimises the standard ventilation flap by allowing more air through the flap in calm weather and less in windy weather.
Completely self-regulating ventilation unit that doesn’t require mains or battery power.
Ventilation unit is discretely integrated into the top of the window - completely invisible from inside.

VELUX smart ventilation – using heat recovery

With VELUX smart ventilation heat recovery unit, you get an incoming flow of fresh air through the flap, pre-heated by the warmth exhaust air – giving you fresh air while keeping the room temperature stable.

VELUX smart ventilation recovers more than 75% of the air that is being extracted from the room warm exhaust.
Ensures a constant air exchange, even during calm and wind-free days, giving optimal indoor climate in any weather.
Increases your indoor climate without unwanted draughts or increasing your heating bill.
The VELUX smart ventilation unit is easily installed with a new window and is invisible from inside the home

Why fresh air?

It is important to maintain a good indoor climate in our living spaces by regularly renewing the indoor air with fresh outdoor air. We spend over 90% of our time indoors, and an average family of four generates up to ten litres of moisture a day through their daily activities.

Fresh air is vital to many of life’s functions. It boosts your energy levels during the day and increases your sleeping quality at night. Increasing your home’s level of fresh air is one of the fastest and easiest ways to improve your indoor comfort.

Maintaining a high level of fresh air in your home can deliver all of these benefits – and much more.

Your family and your home will greatly benefit from background ventilation, which helps you maintain healthy indoor air. Use the VELUX ventilation flap or our ventilation units to ensure a flow of fresh air throughout the day. And because the window remains closed, you can even enjoy background ventilation through the flap when you are asleep.

Take care of the best you have – your health and well-being

Most people know the health importance of a well ventilated home, but did you know that only one out of four ventilates correctly? Lack of ventilation can lead to condensation, too much humidity and high levels of CO₂ in your home. Many things can cause this, including: breathing, perspiration, candles, cooking, drying clothes and much more.
Research shows that even though most of us are aware of the health benefits of fresh air, we’re unaware of the quality of the air in our homes and find it challenging to incorporate window airing routines into our everyday lives. But this is more important than ever.

Yesterday’s indoor climate

In the past, even though indoor heating was cheap and dirty, the poor insulation and finish of the homes allowed for plenty of natural ventilation. Gaps between floorboards, thin, single-glazed windows and simplistic building techniques all contributed to the constant flow of fresh air into homes.

The challenge of today’s indoor climate

The drive to boost the energy performance of today’s modern homes has created increasingly airtight homes, putting the indoor climate in jeopardy. Highly effective thermal insulation, extra layers of glazing, innovative insulation solutions and expertly crafted joints reduce the air exchange in buildings. Therefore, ventilation is more important now than ever before.

Optimizing our modern indoor climate

Natural ventilation through windows or doors is essential to living comfortably in today’s homes. A height difference between the windows increases the stack effect, and thereby impact of the ventilation. The ideal temperature for a living room is around 21° C with a relative humidity level at roughly 40-50%. This can be achieved via natural ventilation using airings, or by using mechanical ventilation systems.

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The danger that you can’t see

Typical pollutants in the home are derived from indoor activities and materials. They are CO₂, moisture, odours (some toxic) from human and material (VOC), ozone, dust, tobacco smoke, and fibres, among others.

In an average home, the pollutant level is normally at a low level when people first enter the home, or after effective ventilation.

After an extended period of time, daily activities can raise the level of pollutants to unhealthy levels. Even a simple activity such as sleeping or cooking can boost the levels in a short period of time.

As a rule of thumb, CO2 should not exceed 1150 ppm (parts per million) in a room (Active house specifications). A person sleeping in a 12 m2 room with no ventilation will produce enough CO2 to raise the level to upwards of 2500 ppm. Symptoms of high CO2 levels include headaches, dizziness and sleepiness.

VELUX supports the Active House principles and finds a maximum level of 1150 ppm (Active House Class II) a relevant reference level for residential buildings.

Lower your CO₂ levels through effective ventilation

You can lower the levels of CO₂ in your home while boosting your health and wellbeing by using ventilation to increase the overall amount of fresh air. And by using ventilation you can significantly reduce the risk for respiratory issues and health problems and enhance your productivity.

Concentration	Situation	Symptoms
400 ppm	Natural level	None
600-800 ppm	Well-ventilated dwelling	None
1150 ppm	Acceptable level for a closed room	Symptoms for asthmatics begin
1150 ppm	Recommended as maximum level by the Active House class ll principles
1150-2500 ppm	Poorly ventilated living room, unventilated bedroom, airtight house	Yawning, drowsiness and dizziness
5000 ppm	Upper limit for continuous exposure	Fainting possible
10000 ppm	Brief exposure only	Nausea, vomiting and fainting

Ventilation facts

1.

A child’s learning abilities can increase up to 15% if they have a good indoor climate

2.

A family of four generates up to ten litres of moisture through their daily activities

Let us help you air out well

It is recommended that you open your windows to air out at least three times a day to get rid of polluted air and humidity after daily activities such as bathing, cooking and sleeping. Do you want to be able to operate your windows from anywhere in your house? And even leave airings to pre-scheduled programs, so you have one less thing to remember? Or are you happy with manual control of your roof windows and quite comfortable with airing out yourself?

VELUX offers a roof window for virtually any need. Our classic, manually operated roof windows and VELUX INTEGRA^® automatic roof windows are the benchmarks of quality and comfort in roof windows. For out-of-reach applications, we always recommend VELUX INTEGRA^® remote-controlled roof windows for easy airing out.

VELUX INTEGRA^® automatic roof windows

With VELUX INTEGRA^® remote-controlled roof windows you can air out with a single touch of the control pad whenever you feel the need. If you’re busy, you can also enjoy automatic airing by using the pre-defined programs. Whatever way, airing is a breeze.

Please note: VELUX INTEGRA^® roof windows are not compatible with VELUX smart ventilation and VELUX balanced ventilation units.

Learn more about VELUX Integra®

VELUX manual roof windows

All our manual roof windows are easy to open for airing. Our top-operated windows can be reached even if you have furniture placed beneath and our bottom-operated windows open outwards for a panoramic view. Both offer step-less opening for comfortable airing.

VELUX balanced ventilation can be installed together with both our top-operated and bottom-operated manual roof windows (available in most sizes).

VELUX smart ventilation can be installed with our top-operated manual roof windows in all MK-sizes.

Learn more about VELUX manual roof windows