Health & safety

DEMM Engineering & Manufacturing - - CONTENTS -

It’s of­fi­cial! New Zealand has just swel­tered through the hottest sumer since records be­gan 84 years ago. And it is a trend that is ex­pected to con­tinue, so now it the time to get a head start on next sum­mer in mak­ing sure your work­place and your em­ploy­ees are cool, com­fort­able and, there­fore, pro­duc­tive.

Air con­di­tion­ing is pop­u­lar but high vol­ume low speed fans (HVLS) in­crease air move­ment and can cost-ef­fec­tively aug­ment oc­cu­pant com­fort or prevent strat­i­fi­ca­tion. Un­like a small, high-ve­loc­ity fan that cre­ates small, tur­bu­lent air streams that quickly dis­perse, an HVLS fan re­lies on size, not speed, to move a sig­nif­i­cant amount of air. Most HVLS fans are more than 2.1m in di­am­e­ter.

An HVLS fan moves air to­wards the floor in a col­umn that rolls in all di­rec­tions un­til it reaches a wall or air­flow from an­other fan. This causes the hot air to go up­wards and back to­wards the blades, and the cold air to sink, mak­ing a cool breeze of up to 5mph send a com­fort wave. To hu­mans, this draught has a per­cieved cool­ing ef­fect of up to 10°C. (Dur­ing win­ter, HVLS fans ef­fec­tively re­dis­tribute warm air trapped at the ceil­ing down to floor level.)

HVLS’ are pop­u­lar in the United States, and in­creas­ing well-re­garded in Aus­tralia while in New Zealand they are also gain­ing a fol­low­ing.

SkyBlade Fans, man­u­fac­tured in the USA, are spe­cially de­signed fans with aero­nau­ti­cal STOL tech­nol­ogy that im­prove over­all com­fort by cre­at­ing a gen­tle breeze over a wide area that uti­lizes the nat­u­ral cool­ing mech­a­nism in the body to make us feel up to cooler. Here are ex­am­ples on how to cut costs with SkyBlade HVLS Fans: Op­er­at­ing on its own: HVLS fans re­place the stale air and in­crease evap­o­ra­tion from skin. Per­ceived tem­per­a­tures are 7–10 de­grees lower. Pro­duc­tiv­ity rises. No need to cut op­er­at­ing hours dur­ing heat waves.

Op­er­at­ing with heat­ing: Us­ing heat­ing less thanks to de­strat­i­fi­ca­tion, which means less noise from op­er­at­ing heat­ing units and up to 20 per­cent sav­ings on heat­ing costs.

Op­er­at­ing with HVAC: Ther­mo­stat of the air-con­di­tion­ing unit can be set 5–7°C warmer with­out no­ticed dif­fer­ence. HVAC sys­tem can be op­er­at­ing for fewer hours, which al­lows sav­ing up to 30 per­cent on cool­ing costs.

Us­ing HVLS in­stead of stan­dard fans: less noise, less en­ergy con­sump­tion, less waste. 1 20’ HVLS can re­place six stan­dard 3’ fans op­er­at­ing at high speeds, pro­vid­ing up to 90 per­cent re­duc­tion in elec­tric­ity con­sump­tion.

Us­ing HVLS for re­mov­ing con­den­sate: mov­ing dry air elim­i­nates con­den­sa­tion prob­lem on the floor, pro­tects sur­face from rust, prod­ucts from dis­col­oration, equip­ment from dam­age and cor­ro­sion and cre­ates safer en­vi­ron­ment for peo­ple and an­i­mals.

Us­ing HVLS to protect build­ings: prevent growth of mould, mildew and bac­te­ria as­so­ci­ated with high hu­mid­ity, which elim­i­nates health and safety con­cerns and un­nec­es­sary ren­o­va­tions.


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