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The sustainable use of energy in buildings is no longer an option – it’s key to improve the performance of facilities and the competitiveness of businesses, as well as to tackle climate change.

What is a sustainable ventilation solution?

A sustainable ventilation solution is an integrated system that arranges air exchange in an organized manner, and is composed of technologies and methods with a high energy and environmental performance. A proper design and control strategy, heat recovery, the use of renewable energy sources, and waste heat are the main aspects which must be taken into consideration for efficient and sustainable ventilation.

What is an HVLS Fan?

Technically speaking, a high-volume, low-speed fan is any ceiling fan that is greater than (3m) 10ft in diameter. This increased size is the hallmark of HVLS fans because it impacts how they operate. HVLS fans use their size, not speed, to move large amounts of air efficiently throughout large spaces. Traditional fans rely on speed to do this, which isn’t usually as effective of an option with regards to energy consumption nor is it as comfortable for the occupant.

HVLS fan working principle as a sustainable ventilation system

A network of HVLS fans strategically located forms a sustainable ventilation system. Continuous air movement positively affects thermal comfort and indoor air quality (IAQ) in large spaces where heat loss, moisture and humidity are common issues. The simple physics of moving air makes HVLS fans a low energy, more sustainable alternative to traditional high-speed fan and HVAC solutions. Other elements such as solar panels can be combined to HVLS installations in order to achieve a fully sustainable air conditioning system.

Large HVLS fans are effective in Summer and Winter

Energy-saving high-volume low-speed fans are the solution of choice in green buildings due to their dual cooling and heating capabilities.

HVLS fans are characterized by being able to move large volumes of air at low revolutions, which translates into energy savings of up to 30% on AC cooling during summer and in some cases, completely eliminates the need for air conditioning. Thanks to their reverse function, you can also save up to 45% on heating during winter, since it distributes the heat that accumulates in the upper layers throughout the entire building area, equalizing the temperature in the building.

Cooling Mode

With the use of large ceiling fans, you are able to achieve a cooling effect of up to -7°C (12º F), and use less energy to cool the area down, resulting in up to 30% savings in HVAC energy.

HVLS fans produce columns of air, which flow down from the fan and then continue to flow horizontally along the floor until the column hits a wall or another fan that carries it further. This increases the air speed at the occupant’s level, making the perceived (feel) temperature much lower than the actual temperature in the building.

This consequently increases convective and evaporative heat loss by the occupant, thus resulting in a cooling effect without changing the dry bulb temperature of the air.

High-performance HVLS fans cool people, not rooms.

Destratification Mode

Most people who purchase a HVLS fan do so to keep a space cooler. However, big fans can also be a highly effective way to keep your space warmer in the winter and cut your electricity bill by up to 45%.

During winter, hot air rises because it’s less dense than cold air. This process, called convection, creates stratified layers of temperature in which the coldest air stays at the bottom of a room while the warmest air stays near the top.

Vindus Fans disrupt this process with their destratification mode. When this mode is selected, the fans will begin mixing all of the room’s air together. As this happens, warm air that was trapped near the building’s ceiling will be distributed evenly throughout the entire room providing the sensation that you have “turned up the heating”. Not only will this keep your rooms warmer in the winter, but it will also help you avoid heat loss and decrease your building’s energy consumption.

HVLS fans are the most energy-efficient ventilation solution and have become a key player in the green building movement.
HVLS fans are the most energy-efficient ventilation solution and have become a key player in the green building movement.

There’s an energy efficiency strategy behind the design of HVLS fans. High-volume, low-speed fans provide users with more functionality than traditional fans do – they are effective to cool, heat and reduce moisture inside a building. Therefore, they have become an energy-saving given in industrial and commercial spaces. HVLS fans are currently the most inexpensive and energy-efficient way to cool down people and animals and to recover heat from the ceilings in large buildings.

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