CHINESE
Agrifan is a most invovative environmental company. Agrifan is thrilled to announce our next generation 54’’ exhaust fiberglass fan series. A recognized industry expert in ventilation states that important criteria when choosing an exhaust fan are Air Flow Ratio, Air Moving Capacity and Energy Efficiency.
一,、Air Flow Ratio(AFR) efficiency:
Air Flow Ratio(AFR) efficiency is determined by dividing the fan performance at .2 static pressure by the fan performance at 0.5 static pressure. As an example, ours(USA Illinois bess lab test No:18804) has a CFM performance at .2 static pressure of 26,800 CFM and at 0.05 static pressure 31,300 CFM. Therefore we divide 26,800/31,300=86%. Why is AFR so important? A 25 MPH wind blowing directly against fans can increase the static pressure these fans are working against by 0.28” static pressure,dramatically reducing their air moving capacity. Over the past 20 years the fan industry has adopted using large discharge cones which substantially increase fan performance and efficiency in a test lab which is protected from outside wind.However,these large cones create the opposite effect in the elements, when the wind blows against them. They become great wind scoops or they stick out past roof lines where they can be easily damaged.
二,、Air moving capacity：
When it comes to air moving capacity the more air the fan moves means fewer fans required and reduced installation and maintenance cost.Agrifan 36’’ ( BESS LAB test NO. 18400) moves 13,350 CFM at @.05” static pressure,11,760 CFM @,2” static pressure,which translates into an air flow ratio of an incredible 88%.
三,、Energy Efficiency：
Based on energy efficiency,most rebate companies require a minimum CFM/Watt of 19@0”static pressure. The AGRIFAN 54’’ @ 20.5 CFM/Watt is certified to AMCA 210-07 test standards today that qualify for rebates. With decreased power consumption, you could see an estimated $2,000 in energy saving over a 5 year period. (Amounts may vary depending on cost per watt in your area.)
