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Noise Optimised Units for Fan Coil Units

Vibration induced noise can be a major problem in fan coil installations. It originates within the motorised impeller unit and cannot be entirely eliminated until new technology invents an induction motor that is free of electromagnetic vibration and an impeller that is perfectly balanced.] Ecofit believe they have gone a long way towards solving the problem by introducing double inlet centrifugal fans that incorporate anti-vibration mountings between the fixed shaft and the scroll mounting arms. The fans, prefixed ‘GDS’, therefore achie...


What’s the difference between Sleeve Bearings and Ball Bearings

Two bearing systems are common in air moving products, sleeve bearings or ball bearings. There are several factors that make it important to consider your choice when making a selection for your application. Sleeve bearing fans are more economical; however, it is not recommended that they are mounted in any position other than horizontal. Temperature is another consideration; if the temperature exceeds 70°C the fan will become inoperable. The lifetime of a sleeve bearing fan is often shorter than that of a ball bearing fan, however, if ...


Sound & Noise Within Industrial Fan Systems

In the world of HVAC the efficiency of industrial fan systems is often compromised by an ineffectively designed air movement system and poor efficiency. This is often accompanied by unwanted fan or air velocity noise making the whole system less than desirable. The annual UK industrial fan power consumption is estimated at well over 30TW-hours. If best practice was applied within the UK, CO2 emissions alone could be reduced by around 2 million tonnes per annum and electrical costs would also be reduced by a similarly shocking amount. Effici...


Ventilation & Energy Efficiency For Powder Control

Clean rooms are vital when it comes to ensuring medicines are contamination free. Investing in new technology in addition to adopting hygienic handling techniques are paramount to effective clean rooms. Not forgetting air ducts and ventilation areas to facilitate the airflow and pressure required to ensure the required number of air changes per house and pressurisation of contaminants. Designers must dedicate time to designing clean rooms and equipment located within them. Modern clean room designs use computer aided engineering programs such a...


Pressurisation Systems For Access & Safe Evacuation

PRESSURISATION OF STAIRCASES: THE IMPORTANCE OF CORRECTLY SELECTING THE SYSTEM CLASS AND CONTROLLING THE DEGREE OF OVER PRESSURE A pressurisation system is intended to prevent smoke leaking through closed doors into stairs by injecting clean air into the stairwell. The intent is to have the highest pressure in the stairwell and a reducing pressure in the accommodation area to facilitate pedestrian escape route and firefighting access. Since the publication of the relevant standard, EN 12101-6, familiarity has increased along with understanding...


Biomass Applications: Selecting Industrial Fans

At Axair we’re familiar with supplying industrial fans for use within renewable energy generation and offer a range of fans specially designed for use in Biomass fuel applications. These fans range from low to high pressure including those for materials handling and high temperatures. The simplest Biomass heaters burn chipped Biomass materials such as wood, straw and elephant grass and use medium pressure blowers such as the Sodeca CMP, CMR and CMA ranges to provide combustion air. The energy produced can be used to heat water or air and...


Indoor Air Quality: Ventilation In Schools

Investigating Indoor Air Quality How often do you hear people talking about pollution, air quality and the cleanliness of outdoor air? The fact of the matter is that most of us spend up to 90% of our time indoors and remain unaware of the quality of the air that we breathe in when indoors, be it at home, school, at our workplace or other indoor areas. Studies show that indoor air can be as much as 50x more polluted than the air outside. The department of Education is currently updating Building bulletin 101 (Guidelines for Ventilation, therma...


Impressive Efficiencies In Fume Extraction

A common control within laboratories for the prevention of explosive and hazardous substances is by using a fume extraction system. Axair Fans has a wide range of corrosion resistant polypropylene fans for use within Industrial, Commercial & Educational fume extraction. There's nothing more exciting for our technical engineers than seeing the largest fan in their range leave the building. Especially into an application perfectly suited to its main features. Powerful, energy saving and quiet, it's hard to ask for more from a fume extr...


Slow & Steady Wins the Race – Inverter Speed Control

Today’s market sees businesses offering faster turnarounds, faster decisions and 24/7 service, so to move slower makes us think we’ll get left behind, that we’ll be losing customers while our competitor's power forwards and as a result, we’ll lose money. So the idea of slowing down to save money is something we don’t consider, however using an inverter to slow down fan systems can be the ideal money saving option. In simple terms, an inverter is used to vary the speed of the motor to match the required load. An inverter can vary t...


The New ATEX Directive 2016 | What You Need To Know

Since 1st July 2003, new equipment sold for hazardous area use in Europe must have complied with ATEX Directive 94/9/EC but as of 20th April, 2016, the new requirements for ATEX, concerning manufacturers of equipment used in explosive atmospheres, come into effect. This new directive supersedes the existing 94/9/EC edition. The Essential Health and Safety Requirements (EHSRs) are the same as in the old Directive (94/9/EC), so there aren’t any technical differences as far as products are concerned with a few exception (contact Axair for more i...