Diagnostic Tools We Use: Portable and Wearable Ambient-Gas Monitors – GreenBuildingAdvisor

By Randy Williams | November 21, 2025

Protecting people first. Every professional and tradesperson who steps into a home—whether for an energy audit/rating, inspection, estimate, or to work—shares one essential responsibility: safeguarding occupant health and safety. Many of the most serious threats we encounter are invisible. These include gases that can accumulate indoors without warning—making ambient-air monitoring tools critical for every job site.

Professionals certified by the Building Performance Institute (BPI) or the Residential Energy Services Network (RESNET) receive training to recognize and mitigate combustion-related hazards. Among these, carbon monoxide (CO) and combustible gases such as methane and propane pose some of the most immediate risks.

Carbon Monoxide: The Silent Threat

According to the Centers for Disease Control and Prevention (CDC), over 400 Americans die each year from unintentional, non-fire-related CO poisoning. Another 100,000 people seek medical treatment, with about 14,000 requiring hospitalization. CO is colorless, odorless, and produced by incomplete combustion of fossil or solid fuels.

Common symptoms of CO exposure include headache, dizziness, nausea, confusion, and eventually loss of consciousness. High concentrations can quickly become fatal.

Wearable Carbon Monoxide Monitors

Wearable CO monitors are compact, portable devices designed to detect CO in ambient air. These are essential safety tools for anyone working near combustion sources, confined spaces, or enclosed structures.

A friend of mine who works in plumbing and heating experienced a close call recently. He was working on a plumbing system in an enclosed structure where concrete finishing was ongoing. The fumes from the gas-powered finishing trowels had unknowingly created a high CO level inside the structure. He began to feel ill and stepped outside. Moments later, he lost consciousness. Another worker found him disoriented. He ended up in the hospital for a time. He told me it was one of the most miserable experiences in his life.