Frequently Asked Questions


Below are some questions that people most commonly ask us regarding Carbon Monoxide Alarms:
  1. To be totally safe, how many CO Alarms should I have in my home?

  2. Where should I install my CO Alarm? Should it be placed high or low on the wall?

  3. A direct plug-in unit placed into an outlet which is around one foot from the ground, how do I know the unit will respond to CO since the position is so low to the ground floor?

  4. How do I know the CO Alarm is working properly?

  5. The CO Alarm goes off and gives a continuous alarm, do I have CO gas in the house? Should I call the fire department?

  6. How soon do I have to replace the CO Alarm?

  7. What should I do if the CO Alarm beeps every minute?




  1. Any areas that I should avoid when using the alarm?

  2. Does a black out or power failure affect the alarm's performance?

  3. What should I do if the LED on the alarm does not light and the test button does not respond?




  1. To be totally safe, how many CO Alarms should I have in my home?
The Consumer Products Safety Commission (CPSC) recommends the use of "at least one CO alarm per household" but for total safety, you should have one on each level of the home.



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  1. Where should I install my CO Alarm? Should it be placed high or low on the wall?
CO poisoning can happen anywhere in the home, but because of the fact that people tend to be more easily overcome by CO gas while sleeping, the best location for the alarm is near the sleeping area.

The density of CO gas at normal room temperature is slightly lighter than air and as such it will permeate the air, similar to the scent of perfume dispersing uniformly in all directions. This characteristic makes it possible for CO alarms to be installed at any height.



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  1. A direct plug-in unit placed into an outlet which is around one foot from the ground, how do I know the unit will respond to CO since the position is so low to the ground floor?
At room temperature the density of Carbon Monoxide gas is very close to the density of air. If there were CO gas in the house, it would spread everywhere.



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  1. How do I know the CO Alarm is working properly?
The test button of the S-TECH CO alarm is designed to simulate 400ppm CO gas. To test, simply push the test button and hold it down until the alarm responds. Alternatively, you may prefer to test the alarm with real CO gas which is available in a test kit package. This test kit is available in many hardware stores.

DO NOT try to use car exhaust to test the unit as car exhaust has other contanimants that may pollute the sensor element and the carbon filter.



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  1. The CO Alarm goes off and gives a continuous alarm, do I have CO gas in the house? Should I call the fire department?
UL recommends that if the alarm sounds:

  1. Operate reset / silence button;


  2. Call your emergency services or fire department or 911;


  3. Immediately move to fresh air -- outdoors or by an open door/window. Do a head count to check that all persons are accounted for. Do not reenter the premises nor move away from the open door/window until the emergency services responders have arrived, the premises have been aired out, and your alarm remains in its normal "no alarm" condition.


  4. If your alarm reactivates within a 24-hour period, call a qualified technician to examine the source.



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  1. How soon do I have to replace the CO Alarm?
S-TECH Carbon Monoxide Alarms use a well known tin oxide based solid-state sensors. It has excellent stability and over a decade of proven field performance, exceding any other technologies. Patrick Plastics recommends to replace CO Alarms every 5 years.



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  1. What should I do if the CO Alarm beeps every minute?
Intermittent beeps indicate that there is trouble or a problem with your alarm. The built in self-diagnostic circuitry of the S-TECH detector has detected a problem. Return the unit for repair or replacement or call our customer service hotline at
1-800-203-7987 for technical support.



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  1. Any areas that I should avoid when using the alarm?
The CO Alarm should be installed at least 5 feet from any appliance including the furnace.

Do not install in a bathroom as the steam which is basically saturated water could cause the detector to false alarm.



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  1. Does a black out or power failure affect the alarm's performance?
The CO Alarm will not operate during a power failure. Once the power returns, it should not affect the detector. To be certain, push the test button making sure that is responds correctly.



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  1. What should I do if the LED on the alarm does not light and the test button does not respond?
Check the power source making sure the breaker is on, then check the outlet for power. If the unit does not activate, return it for repair or replacement by calling our customer service hotline at
1-800-203-7987 for technical support.



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S-TECH
1495 DENISON STREET, MARKHAM,
ONTARIO L3R 5H1
TEL:(905) 660-90661-800-203-7987
FAX:(905) 660-9261
E-mail: info@s-tech.ca
Website: www.s-tech.ca


Stech is ISO 9001 Compliant