Ease BLDC Pedestal Fan

Details

A pedestal fan on a BLDC motor. The 400 mm draws 28 W at full speed and moves 72 m3/min, which is a service value of 2.6 m3/min/W, against about 110 W for a conventional 400 mm pedestal fan doing the same work. We quote no BEE star on this item, because we have not put one on it, and the measured input power and the measured air delivery are the whole of the energy claim. It is worth saying that a pedestal fan's service value is roughly a third of a ceiling fan's, because it pushes air through a guard and into a narrow cone rather than down an open column, so comparing our 2.6 with a ceiling fan's 7.9 is a category error rather than a verdict. The part that ends a pedestal fan is the oscillation gearbox. It grinds, then it seizes, then the fan is a fan that points one way. Almost every gearbox in the category is sealed, sometimes welded, and it is a Rs 300 assembly inside a Rs 3,000 machine.

• 28 W at full on the 400 mm and 32 W on the 450 mm, against about 110 W for a conventional pedestal fan of the same sweep
• Air delivery 72 m3/min (400 mm) and 85 m3/min (450 mm), measured at rated voltage
• Copper stator winding, three phase, 13 ohm per phase at 25 C. Copper clad aluminium of the same gauge reads about half again as high, which is how it is caught
• Oscillation gearbox opens with three screws and takes fresh grease: a hardened steel worm on a sintered bronze wheel in a die cast aluminium case, packed with lithium soap grease
• Cast iron base plate, 3.6 kg on the 400 mm and 4.2 kg on the 450 mm. Not a hollow shell filled with sand, which is what the weight in most pedestal fans actually is
• Holds speed from 140 V to 285 V, so it works on an inverter supply
• Blade, both guards, gearbox, driver module and base are stocked service parts. Spares held 7 years, on a spares bank bought with the first production run, a seven year supply clause with the maker, and the guard, blade and gearbox case tooling held in our name
• 2 years comprehensive, 5 years separately on the BLDC motor
• 48 dB(A) at 1 m in front on full speed, measured in a room with a background below 30 dB(A). A pedestal fan sits at head height and points at you, so it will always read louder than a ceiling fan at the same air delivery
• Left out: no sealed gearbox, no capacitor, no sand filled base, no remote only control
• There is no Shuunnya service network. A claim is answered by sending the part. The gearbox, the blade and the guards are parts an owner can fit, and we do not promise a turnaround because we cannot keep one yet