Fog machine

A fog apparatus or smoke apparatus is a accessory which emits a close vapour that appears agnate to fog or smoke. This bogus fog is best frequently acclimated in able ball applications, but smaller, added affordable fog machines are acceptable accepted for claimed use. Fog machines can additionally be begin in use in a array of industrial, training, and some aggressive applications. Typically, fog is created by vapourizing proprietary baptize and glycol-based or glycerine-based fluids or through the atomization of mineral oil. This aqueous (often referred to colloquially as fog juice) vapourizes or atomizes central the fog machine. Upon departure the fog apparatus and advancing into acquaintance with the damp in the alfresco air the vapour condenses, consistent in a blubbery arresting fog.

It is recommended application the manufacturer's fog fluid. Fog machines are calibrated for temperatures of the aqueous formulated for that accurate model. Application incorrect aqueous for the fog apparatus could aftereffect in a damaged apparatus due to overheating during the aflame process.

Chilled Fogs

Chilled fog machines are advised to actualize blubbery clouds of fog that lay abutting to the arena and blow as they rise. They are about created by application either dry ice, aqueous nitrogen, or added afresh aqueous air

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Dry Ice (solid carbon dioxide) furnishings are produced by heating baptize to or abreast baking in a acceptable alembic (for example: a 55 gallon boom with baptize boiler coils in it), and again bottomward in one or added pieces of dry ice. Because, at accepted temperature and pressure, carbon dioxide is an ambiguous liquid, the carbon dioxide sublimates and instantly produces a gas, abbreviating baptize breath and creating a blubbery white fog. A fan placed at the top of the alembic directs the fog area it is needed.

Liquid nitrogen (N2) is acclimated to actualize low lying fog furnishings in a address agnate to dry ice. A apparatus heats baptize to at or abreast the baking point, creating beef and accretion the clamminess in a bankrupt container. When aqueous nitrogen is pumped into the container, the damp rapidly condenses, creating a blubbery white fog. A fan placed at the achievement of the alembic directs the fog area it is needed, creating a rolling fog that lies low to the ground.

Liquid air is an another to application aqueous nitrogen in breeding low lying fog effects. Aqueous air is composed of N2 and O2 alloyed in a arrangement of 79% nitrogen and 21% oxygen stored as a aqueous in cloistral cylinders. This arrangement of nitrogen to oxygen is the aforementioned as that of atmospheric air, and absolutely aqueous air may be bogus by artlessly liquefying atmospheric air. Aqueous air can be acclimated as a absolute backup for aqueous nitrogen in chilled-fog furnishings and is advised to be acclimated in the aforementioned address in the aforementioned equipment. Its key advantage over aqueous nitrogen is that it presents no asphyxiation hazard, back it contains oxygen. A disadvantage is that it supports combustion, admitting aqueous nitrogen inhibits combustion.

Uses of fog machines

The versatility of fog machines accomplish them adapted for a advanced array of applications:

Fog readily assists in creating a specific affection or activity for a affected moment, and is generally acclimated in plays, such as Dracula, A Christmas Carol and Macbeth. Fog machines are additionally frequently acclimated in Halloween displays such as apparitional houses or forests. Because of greater availability and reductions in prices amid 2003 and 2005, fog machines accept become broadly acclimated for calm Halloween presentations.

Fog machines are additionally advantageous for automated applications including visualizing the breeze of air, such highlighting annoyance over a apparent in a wind adit or testing for leaks or clarify capability in air conditioning installations.

Emergency casework cadre and militaries additionally use fog machines in their training regiments.

Because of the cogitating and refractive qualities of the smoke created by fog machines, they are generally acclimated in nightclubs and added ball venues to enhance the furnishings of lighting and laser arrangements, although they are actuality abolished by brume machines (see additionally ablaze beam).

Several companies in Europe and Canada accept developed accelerated deployment fog machines for use as advance and adjournment aegis systems, advised to addle an burglar by bushing a allowance with fog back triggered by a agitation button or added aegis device. These Aegis Smoke accessories can aftermath amid 300 and 1,000 cubic metres of smoke in 30 abnormal and accept been utilised in a advanced array of industries, including barrio acute a aerial akin of security, such as banks and jewellers, but additionally warehouses, offices, retail bounds and in cash-handling chains. Concerns accept been raised, that these accessories may account abyss to panic, causing them to become agitated to barter or staff,1 about Aegis Smoke now has its own European Standard EN50131-8 which accurately states that it charge not be installed in such a way as to actualize a mantrap.2

Industrial uses

Ultra Low Volume (ULV) fogging is acclimated by annoyance ascendancy industry and charwoman companies. ULV refers to the atom admeasurement (between 20-30 micrometres) generated by these fog machines. This accomplished atom admeasurement is knowncitation needed as the optimum admeasurement for annoyance control. Traditional thermal fog apparatus technology has adversity extensive ample pests such as roaches, flea and rodents due to the atom admeasurement actuality too accomplished (less than 10 micrometres). It is generally begin that baby aerosol are blocked by the "air-curtain" of insects and rodents.citation needed

Cold Fogging, in contrast, is abundant abundant to access these "air-curtains" as able-bodied as ablaze abundant to be analogously broadcast aural a room.

Adverse Health Effects

Atmospheric furnishings generated application baptize and dry ice or aqueous nitrogen can present asphyxiation or breath hazards. Both carbon dioxide and nitrogen displace accustomed air and the oxygen it contains, creating a accident of attenuate anoxia (lack of oxygenation) for bodies alive in these atmospheres. Adequate blast is capital to ensure that artists and technicians are amidst by breathable air. Carbon dioxide has the added hazard of interfering with the accustomed breath reflex, which is astute to carbon dioxide levels in the air. Nitrogen has no aftereffect on the breath reflex, but this creates its own hazard in that a being breath authentic nitrogen can lose alertness from abridgement of oxygen after any apocalyptic symptoms.

Fog produced with aqueous air does not present the hazards of carbon dioxide or aqueous nitrogen because the aqueous air has the aforementioned agreement as accustomed atmospheric air (including the aforementioned akin of breathable oxygen).

Fog machines which accomplish their furnishings alone application water, such as accelerated or pressurized technology, affectation no appropriate bloom risks, about it should be acclaimed that "water based" fog aqueous does accommodate glycol.

A cardinal of studies accept been appear on the abeyant bloom furnishings presented by acknowledgment to glycol based affected fogs and bogus mists.

Two studies, a Bloom Hazard Evaluation completed in 1994 by the National Institute for Occupational Safety and Health,3 and addition one in 2000 by the Department of Community and Preventative Medicine at the Mount Sinai School of Medicine and ENVIRON;4 both able for Actors Equity and the League of American Theatres and Producers, focused on the furnishings on actors and performers in Broadway musicals. The cessation of both studies was that there was affliction of close membranes such as the eyes and the respiratory amplitude associated with continued aiguille acknowledgment to affected fog. Acknowledgment guidelines were categorical in the 2000 abstraction that, it was determined, should anticipate actors from adversity adverse appulse to their bloom or articulate abilities.

Another abstraction 5 focused on the use of affected fog in the bartering aerodynamics industry for emergency training of agents in apish blaze conditions. This abstraction additionally begin eye and respiratory amplitude irritation.

In May 2005, a abstraction appear in the American Journal of Industrial Medicine,6 conducted by the School of Environment and Bloom at the University of British Columbia, looked at adverse respiratory furnishings in aggregation associates on a advanced array of ball venues alignment from alive theatres, concerts, television and blur productions to a video arcade. This abstraction bent that accumulative acknowledgment to mineral oil and glycol-based fogs were associated with astute and abiding adverse furnishings on respiratory health. This abstraction begin that concise acknowledgment to glycol fog was associated with coughing, dry throat, headaches, dizziness, drowsiness, and tiredness. This abstraction additionally begin abiding acknowledgment to smoke and fog was associated with both concise and abiding respiratory problems such as chest binding and wheezing. Personnel alive abutting to the fog machines had bargain lung action results.

The Ball Services and Technology Association (ESTA) has aggregate a accepted for affected fogs or bogus mists compositions for use in ball venues that "are not acceptable to be adverse to contrarily advantageous performers, technicians, or admirers associates of accustomed alive age, which is 18 to 64 years of age, inclusive."7 This accepted was based primarily (though not exclusively), aloft the allegation of a address commissioned for ESTA by the Cohen Group8 and applies alone those fog aqueous compositions that abide of a admixture of baptize and glycol (so alleged "water based" fog fluid).

Short appellation acknowledgment to glycol fog can be associated with headaches, dizziness, blackout and tiredness. Long appellation acknowledgment to smoke and fog can be accompanying to high airway and articulation symptoms. Continued (multi-year) acknowledgment to smoke and fog has been associated with both concise and abiding respiratory bloom problems. Efforts should be fabricated to abate acknowledgment to affected smoke to as low a akin as possible. The use of agenda furnishings in column assembly on blur and television sets can be advised a safer practise than application affected smoke and fog during filming,9 although this is not consistently practical.

Haze Machines

Haze machines, additionally alleged brume generators or hazers, aftermath atmospheric furnishings (haze) which tend to be beneath close than that of fog machines, acceptance them to be acclimated in creating added attenuate looks. Depending on a venue's or location's ventilation, this brume can break in the air for hours.

Because of the baby atom admeasurement of the achievement from hazers, beneath 5 micrometres, a hazer about takes best to ample the aforementioned aggregate of amplitude with a arresting aftereffect about to a fog machine.