Although we cannot touch or see it, air has volume and weight. This is important to understand when it comes to air movement in a facility. Typical HVAC systems will roll the layers of cool and hot air by blowing air to cool the targeted areas and suck the warmer air out through exhaust duct vents. As such, you’re more likely to feel inconsistent flow of air throughout the warehouse with cool and warm spots. Additionally,the large power and energy used will be reflected in your electric bill.
The MacroAir high volume low speed (HVLS) fans work differently to destratify the air silo. They fundamentally change the molecular make-up of the air by directing a massive amount of gently moving air to the floor. As it makes contact with the floor, the air disperses as a horizontal floor jet in a 360-degree circle.
Large, slow moving fans cool better and more efficiently than small high-speed fans. By pushing a large volume of slow moving air – rather than a narrow targeted high-velocity column of air – less friction is created at the edges of the moving column. A single fan with a diameter up to 24 feet will push up to 375,000 cubic feet of air per minute to the floor.
The same pressure then pushes the air up the building walls to the ceiling and recirculates throughout the facility. In its path, the air has changed, warm air mingled with the cooler to lower the temperature of the whole. A nice effect of the motion and the change is people feel cooled because any air movement (a cool gentle breeze) evaporates moisture on the skin.
If your warehouse is air conditioned, it is organized around functional areas, such as those requiring constant temperature. Since air conditioning is so expensive, and most facility owners or managers are reluctant to run it constantly, supplementing it with HVLS fans is a cost effective option.
A single 24-foot MacroAir AirSpan™ can cool approximately 20,000 square feet of warehouse space for about $1.00 per day. Additionally, the Air Span could even replace 18 to 20 high-speed fans.
By adding a HVLS fan in a facility, building managers of air-conditioned spaces can lower the temperature by 15 degrees. They can also increase the thermostat set point to achieve a 3 to 5 percent reduction in energy consumption for each degree adjusted. The architect designing a new warehouse building can also reduce the air conditioning tonnage by 40 percent, if HVLS fans are included.
For more information on how HVLS fans can help influence your design, save costs and help building projects achieve LEED certification, visit the MacroAir Architects & Engineers’ Portal.