Smoke alarms are your first line of defence
in the event of a fire. Smoke alarms
come in two main different types which are Ionization and photoelectric.
Ionization smoke alarms have an ionization
chamber inside the smoke alarm unit itself.
The smoke alarm chamber consists of two plates about a centimetre
apart. One of the plates is charged
positive by the battery or transformer in AC models and the other plates is
negative. Alpha particles constantly
released by the americium knock electrons off of the atoms in the air, ionizing
the oxygen and nitrogen atoms in the chamber. The positively-charged oxygen and
nitrogen atoms are attracted to the negative plate and the electrons are attracted
to the positive plate, generating a minuet, constant electrical current. Upon
smoke entering the chamber, the smoke particles attach to the ions and
neutralize them, so they do not reach the plate. The drop in current between
the plates triggers the alarm.
Photoelectric smoke alarms have an internal
chamber with a light beam. When smoke
enters the chamber it blocks the light from entering the photoelectric sensor
causing an alarm to sound. Smoke may
also cause the light beam to scatter creating an inconsistent pattern on the
photocell causing the smoke alarm to sound.
Photoelectric chambers can detect a smouldering fire faster than most
ionization type smoke alarms.
Battery or AC
Smoke alarms are most commonly seen as
battery operated units in older homes.
Battery units are also common in situations where a smoke alarm is added
and AC power is not accessible. AC units
power the smoke alarm with standard AC current from the homes wiring. AC units are common in newer homes. Current new construction code requires smoke
alarms to be AC with a battery built into the unit as a backup power source.
Current Smoke Alarms
Current smoke alarms used in new
construction homes are AC and battery combination units as stated above. They also require a dual sensing smoke alarm
unit. The most common dual sensing
combination is either photoelectric and ionization or a combination ionization
and carbon monoxide unit.
Carbon Monoxide Alarms
Carbon monoxide also called the invisible killer
is odourless and colourless gas. Carbon
monoxide is most commonly created in the home when unburnt or improperly vented
heating equipment releases the gas.
Carbon monoxide can be created from natural gas heaters, wood burners,
and oil burners. Carbon monoxide can
also enter the home from the exhaust of a running vehicle or generator.
Carbon monoxide effects
some people easier than others. People
such as elderly, pregnant women, infants, and people with emphysema, asthma, or
heart disease can suffer the effects of carbon monoxide much quicker than a
healthy person.
Smoke Alarm Installation
We can install most major brands of smoke
alarms. We highly recommended the AC
with battery backup units for superior performance.
About
AAA Fix-It
AAA Fix-It is a leader in home repair and maintenance
services specializing in air conditioning, plumbing, painting, electrical service and
remodelling services for home and commercial customers. Since 2010, homeowners
across Kuala Lumpur have been calling on AAA Fix-It for our professional
craftsmanship and exemplary customer service.
For more information or to receive a
quotation please contact AAA Fix-It Kuala Lumpur
Tel.: +6 (3) 4043-6090 - E-Mail: info@aaa.my - Internet: http://www.aaa.my
Tel.: +6 (3) 4043-6090 - E-Mail: info@aaa.my - Internet: http://www.aaa.my
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