Most of us are now familiar with HVLS style fans. Brands with grandiose names have aggressively marketed them as a ventilation option for vast venues. While HVLS fans may be beneficial additions to an existing ventilation system, there are some restrictions and operating rules that must be followed to optimize their effectiveness.
HVLS Fan Elements
High-volume, low-speed ceiling fans evolved from the standard industrial ceiling fan. HVLS fan Singapore has been carefully constructed to circulate enormous quantities of air uniformly from the central hub to the blade tip, drawing inspiration from aviation wings. Most manufacturers provide HVLS fans with diameters ranging from 8′ to 24′. Despite their size, the majority of HVLS fan motors have less than 2 horsepower. Therefore, they are a cost-effective means of transporting enormous amounts of air.
Summertime Cooling for Comfort
When utilized to offer individuals with comfort cooling, an HVLS fan may lower the felt temperature by up to 10 degrees Fahrenheit. This is because air passing over a person’s skin evaporates perspiration, resulting in adiabatic cooling. The air velocity influences the amount of adiabatic cooling and the cooling impact felt by a person. HVLS fan Singapore are excellent for comfort cooling because they can flow air at the optimal velocity to provide the most adiabatic cooling impact over a big area.
Before installing an HVLS fan for comfort cooling, there are many aspects to consider. First, in a building without air conditioning, the ventilation system must be enough to maintain the same temperature inside as outside. Before installing an HVLS fan, the solar heat load on a building must be eliminated, since it might result in a substantially hotter interior. If not, the HVLS fan will pull the warmest air from the top of the building and blast it down onto the people below, roasting them through convection.
Because the HVLS fan offers a cooling effect but does not alter the air temperature, it should be positioned where its airflow can be felt. Therefore, the optimal site for an HVLS fan is a place with a large population density.
Consider utilising spread and throw calculations to establish the optimal height for an HVLS fan to disperse air at the optimal velocity across the widest area feasible. In my Spread and Throw blog post from January 7, 2020, I detailed the process and formulae for calculating spread and throw, as well as how to utilise them to establish the optimal location for a comfort cooling fan.
Winter stratification reduction
In the winter, the bad property of an HVLS fan to possibly cook humans through convection becomes a beneficial property. Because warm air rises in a heated space, the air at the ceiling will be warmer than the air at the floor. This is referred to as stratification of air temperature. A HVLS fan may be used successfully to transfer hot air from the top of a building to the floor, resulting in cheaper heating costs and increased comfort for those on the floor.
In the winter, while utilizing an HVLS fan Singapore to convey hot air to floor level, the air velocity should be lower than in the summer. This is done to prevent the possibility of producing adiabatic cooling, which would negate the advantage of transporting warm air to the floor. Choose an HVLS fan with variable speed settings or one that is compatible with a VFD in order to lessen the fan speed throughout the winter.
Selecting and installing an HVLS fan Singapore correctly for your application may make it a valuable addition to your ventilation system. The advantages of increased worker productivity in the summer and reduced heating expenditures in the winter will deliver a rapid return on your investment. If you are unsure of which HVLS fans are ideal for your application, contact a ventilation specialist at Eldridge, and we can assist you in establishing a productive atmosphere at your business.
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