Carbon monoxide is called the silent killer for good reason — it is an odorless, colorless, tasteless gas that can cause serious illness and death before you even realize something is wrong. If your Tucson home has a gas furnace, gas water heater, gas stove, or fireplace, understanding carbon monoxide risks is essential for your family's safety. Here is what you need to know.
What Produces Carbon Monoxide in Your Home?
Carbon monoxide is a byproduct of incomplete combustion. Any appliance that burns fuel — natural gas, propane, oil, or wood — produces some amount of CO. In a properly functioning system, the CO is safely vented outside. Problems arise when equipment malfunctions, ventilation is blocked, or combustion is incomplete. The most common sources of CO in Tucson homes include gas furnaces with cracked heat exchangers, gas water heaters with blocked or deteriorated venting, gas stoves used for heating instead of cooking, fireplaces with blocked or damaged chimneys, and attached garages where vehicles idle.
Why Tucson Homeowners Should Pay Attention
Many Tucson residents assume CO poisoning is only a concern in colder climates where furnaces run for months on end. That assumption is dangerous. Tucson's short but cold winter nights mean furnaces cycle on and off frequently, and a cracked heat exchanger or blocked vent can release CO whenever the furnace fires. Gas water heaters run year-round. And because Tucson homes are often tightly sealed to keep cool air in during summer, CO can accumulate quickly if a source develops.
Symptoms of Carbon Monoxide Poisoning
CO poisoning symptoms are easily mistaken for the flu. Early symptoms include headache, dizziness, nausea, fatigue, and shortness of breath. As exposure continues, symptoms progress to confusion, impaired coordination, vomiting, loss of consciousness, and potentially death. Because the symptoms are nonspecific, many people do not realize they are being poisoned until the exposure is severe. A critical clue is if multiple household members experience these symptoms simultaneously, especially if symptoms improve when they leave the house.
The Importance of CO Detectors
Every Tucson home with gas appliances or an attached garage should have carbon monoxide detectors installed on every level of the home, near sleeping areas, and within 15 feet of any gas-burning appliance. Arizona does not currently mandate CO detectors in all homes, but the National Fire Protection Association recommends them and many Tucson building codes require them in new construction. Battery-powered, plug-in, and hardwired models are all available, typically costing $20 to $50 each. Replace batteries annually and replace the entire unit every 5 to 7 years.
The Cracked Heat Exchanger Danger
The heat exchanger in your gas furnace is the component that separates the combustion gases from the air that circulates through your home. Over time, the repeated heating and cooling cycles cause metal fatigue, and cracks can develop. A cracked heat exchanger allows carbon monoxide to mix with your household air supply. This is one of the most serious safety hazards in residential HVAC and is a primary reason why annual furnace inspections are so important. A qualified technician can detect heat exchanger cracks during a routine maintenance visit.
What to Do If Your CO Detector Goes Off
If your carbon monoxide detector sounds an alarm, take it seriously every time. Immediately move everyone, including pets, out of the house. Call 911 from outside. Do not re-enter the home until emergency responders have declared it safe. Do not assume it is a false alarm — CO detectors rarely produce false positives. The fire department will use professional-grade detection equipment to identify the source and determine when it is safe to return.
Prevention Through Maintenance
The most effective way to prevent carbon monoxide incidents in your Tucson home is regular professional maintenance of all gas-burning appliances. Have your gas furnace inspected annually, with specific attention to the heat exchanger and venting. Have your gas water heater inspected for proper venting and combustion. Never use your gas stove or oven to heat your home. Keep fireplace chimneys and flues clean and unobstructed. And never run a generator, grill, or vehicle engine in an attached garage, even with the door open.
Schedule Your Safety Inspection
ABC Water & Air performs thorough gas furnace safety inspections for Tucson homes, including heat exchanger evaluation, combustion analysis, and venting verification. Your family's safety is not something to leave to chance. Call (520) 812-1597 to schedule your inspection before the heating season begins.