Whether you want to install an exhaust fan in your kitchen or bathroom, you get the option of choosing from the best quality metal as well as plastic exhaust fans. We found that the problem was caused by a very loud and annoying low frequency tone (“hum”) emanating from the blower. We were then consulted. These lowered the noise to 75 dBA (a 6 dBA sound attenuation), easily achieving the company's 80 dBA target for nearby workers. Residents were so relieved the highly annoying hum was no longer audible that several wrote to thank the bakery company. Often companies guess which item(s) are causing noise nuisance and because guesses are usually wrong, they spend substantial time and money on fan noise mitigation measures that provide little or no sound reduction. This enables the fan noise suppression treatment to be tailored precisely, which can provide considerable cost savings. Another major benefit is that companies can save thousands of pounds by choosing advanced fan noise solutions instead of other noise suppression products. An industrial blower on a drier was causing noise nuisance and annoyance to local residents. Dirt & grease deposits on exhaust fan blades in any exhaust system will affect the fan noise level, both from the disruption of smooth airflow and possibly from a loss of perfect balance of the fan blades. Then the company asked us how to reduce the fan noise. Due to these large benefits, advanced solutions have proved highly popular and we have used them successfully to reduce fan noise on numerous extractors and dust extraction systems for many industrial companies and factories throughout the UK. Specific diameter (DS) and efficiency vs. specific speed (NS) are shown. Turn the exhaust fan ON and look at the fan blade or blower wheel with a flashlight to find out where it is hitting. An industrial extract fan used for ventilation was exposing workers to 85 dBA. Fan Speed ControllersMost models of fans are fixed at one rate of speed (RPM) and depending on the power output and speed of the fan, will dictate how much of a loud noise there will be. Specifications: 0.5 HP to 15 HP; 300 mm to 1500 mm; Factory exhaust and ventilation; Mild steel casing and stand with aluminum impeller ... Axial Flow Fan are also termed as industrial exhaust fan. We designed fan noise mitigation modifications for the outlet duct. For a costing, or to find out how our specialist fan noise reduction company can help you suppress industrial extractor fan noise or sound from blowers on AHU (air handling units), HVAC ventilation units, air conditioner systems, etc., contact us or ring the 'phone number below. ... Industrial grade exhaust fans When selecting an exhaust fan for your … read more... Raju Electricals. 1. This silencing method achieved an 8 dBA fan noise attenuation, lowering workers' noise levels to 81 dBA for very low cost. It contributes to broad band noise. Some companies treat the wrong fan, blower or noise source. Our client expressed a need to access the machines for routine maintenance. Has a copper motor giving low noise when in use; It is a small-sized and wall mounted fan to save space; Voltage: 220V / Frequency: 50Hz / Rated Power: 12W / Noise: 34dB; Applicable area: 10-20m 2 / Rotating speed: 2000 rpm; Dimensions: 15cm x 15cm x 13cm (L x W x H) Package content: 1 x Ventilation Fan Low Noise Exhaust Fan; 4 x screws Vogue Series (Reverse Flow) Commercial applications such as schools, office buildings, factories, cafes, bars, workshops, and kitchen ventilation. In our projects, we always carry out an assessment to determine the best and lowest cost sound reduction option for the particular fan and extraction system. Contact Us Directly (855) 484-3292. Please note, comments must be approved before they are published, choosing a selection results in a full page refresh. Our industrial fan noise reduction specialists designed small airflow noise mitigation measures to attenuate the sound from some paint booth ventilation extractor fans. If the noise is now gone and the bathroom exhaust fan is quieter, the problem is fixed. Position: Interior. Our small noise mitigation measures were applied to the fans, reducing the air conveyor noise by 6 dBA such that sound levels fell below the 85 dBA target. We solved the problem by fitting a simple fan noise suppression solution to the intake of the existing ducting. Ask our expert. This achieved such a large noise reduction that the fans could no longer be heard at the nearest residential property. Renewing the bearings reduced the sound from 87 dBA to 83 dBA, easily achieving the 85 dBA target for nearby workers - a very low cost fan noise control method ! If you find the score anything between 70-85 dB, you need to read the rest of the article carefully. Due to the high cost, they consulted our fan noise reduction company first. Fans are a significant contributor to workplace and … Our noise cancellation solution was entirely made from steel, so could withstand all kinds of weather including any rain water that entered the fan via the exhaust stack. Industrial Exhaust Silencer Overview. When operating exhaust fans in abrasive, corrosive or high temperature environments, special coatings such as epoxy or heresite coatings may be required to achieve maximum protection and operating life. A very high sound reduction was needed because the fan operates all night. Among them, aerofoil blade shapes are considered for effective standard fan design because of their higher efficiency and low noise levels. The resulting noise level was 81 - 82 dBA at nearby workers, well below the legal limit for noise at work. Using basic information about each fan and detailed frequency analysis of the sound, we quickly identified the source of the hum. According to a June 2017 article in Processing Magazine, typical industrial noise levels from a fan application can range from about 70-120 dB. This achieved a massive 32 dB sound reduction, making the blower whine inaudible. Inlet and Outlet disturbances, sharp edges and bends will cause increased turbulence and noise.3.SpeedSpeed is a major contributor to fan noise. Fan data shall be obtained from experimental tests.
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