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Douglas Krantz -- Fire Alarm Engineering Technician, Electronic Designer, Electronic Technician, Writer

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Popular Articles

What is a Stair Pressurization Fan (SPF)? -- In case of fire in a high rise building, an SPF uses clean outside air to pressurize the air in stairwells. The pressurized air helps people escape... Read More

How Does Class A Fire Alarm Wiring Work?-- Fire alarm systems save lives and protect property. Fire alarm systems also break down because... Read More

What's the Difference Between Class A and Class B? -- The Fire Alarm System is a Life Safety System - so the occupants of a building can escape quickly, the idea behind a Fire Alarm System is that it will provide a warning that there is a fire. The trouble is, if something is wrong with the system, like a wire is broken somewhere in the building, the Fire Alarm System... Read More

What is a Flyback Diode? -- Someone Thinks the Flyback Diode is Important. Manufacturers all over the world spend good money installing these diodes, they must think they're ... Read More

What is a Waterflow Switch? -- The fire alarm waterflow switch, a delayed action mechanical/electrical assembly, is a conventionally wired fire alarm device. The fire department reacts... Read More

What Should I Do When the Fire Alarm Sounds? -- When the alarm sounds, as caretaker for an apartment building, what should you be doing? "I would never suggest turning off the fire alarms, or in any way... Read More

What is a Fire Alarm System? -- Long ago, as earliest method of spreading the word of fire danger, people shouted "Fire!" Depending on the circumstances, people would run... Read More

What Does E=IR Really Mean? -- If it isn't just a word, and it isn't really something to be memorized in order to pass a test, what do the letters in Ohm's Law really mean?... Read More