What to Do if You Smell Gas
If you detect a "rotten egg" odor near your furnace or attic space, this is a technical emergency. Natural gas is odorless; the mercaptan (sulfur) smell is added so you can detect even minute leaks before they reach a combustible technical concentration. At Hvac Houston Services, we treat gas leak calls with the highest priority, utilizing calibrated electronic sensing equipment that can detect gas levels far below what a human nose can perceive.
Technical Detection: Electronic Sniffing vs. Ultrasonic
Finding a leak inside a furnace cabinet requires technical precision. We use Combustible Gas Detectors (CGDs) that sample the air at the rate of several times per second, allowing us to trace a leak back to its exact mechanical source—whether it's a cracked manifold, a failing gas valve, or a vibrating coupling. For larger gas lines in attics or crawlspaces, we may use Ultrasonic Leak Detectors that "listen" for the technical high-frequency sound of escaping gas, even through insulation.
The Danger of Heat Exchanger Cracks
A common technical source of gas odors and carbon monoxide in Houston furnaces is a compromised heat exchanger. Over years of thermal expansion and contraction, the metal "cells" can develop hairline fractures. During operation, this allows raw combustion gases to be pulled into the supply air of your home. We use specialized fiber-optic cameras to perform an internal technical inspection of your heat exchanger, verifying its structural integrity and ensuring your family is safe from CO poisoning.
Technical Highlight: Lower Explosive Limit (LEL)
"During an inspection, we measure the concentration of gas as a percentage of its LEL. This provides a scientific basis for clearing the home or requiring immediate gas shut-off. We don't guess with your safety; we use calibrated data to make hard technical decisions." - Alexander Hill
Our Safety Inspection Protocol
When we perform a gas safety audit, we cover every technical component:
- Supply Line Verification: Testing all fittings from the meter to the equipment using high-viscosity leak detection fluid.
- Gas Valve Pressure: Measuring the manifold pressure in inches of Water Column (WC) to ensure the furnace is burning at design specifications.
- Venting Integrity: Inspecting the B-vent or PVC exhaust to ensure no combustion gases are leaking back into the attic or home.
- Safety Sensor Calibration: testing flame sensors and high-limit switches to ensure they technically "trip" in the event of an unsafe condition.
Your Houston Safety Partners
If you suspect a gas leak, leave the premises immediately and call (281) 789-2402. We provide 24/7 emergency dispatch for gas safety calls. We offer upfront, flat-rate pricing for all repairs and provide a full technical safety certification upon completion of work. Your family's protection is our primary mission.