Every Gas Appliance Has To Be Covered
One or more alarms may be required in each dwelling unit. Every fuel-gas-burning appliance must be covered by an alarm installed in the same room and within the required placement distance. One alarm may cover multiple appliances when a single compliant location serves all of them.
An apartment with a range in the kitchen and a dryer in a separate laundry room will normally need two alarms. A range, a water heater, a boiler, a gas dryer or a fireplace can each develop a slow leak long before anyone notices it.
The CG-GD1 monitors continuously and alarms when methane at the sensor reaches the specified 10% LEL threshold, whether or not anyone notices an odor.
Ten Years Of Protection, Built In
The CG-GD1 runs on a DC3V built-in lithium battery. The battery is designed to last approximately ten years from the date of activation, so there is no annual battery change and nothing to forget.
The alarm reaches the end of its service life approximately ten years after the installation date, and the whole unit is replaced rather than the battery. Supplied mounting hardware holds it to the wall. Press the TEST button once a week: every LED lights, the green LED flashes three times, and the red and yellow LEDs turn on and remain solid.
Engineered To Do One Job Properly
10-Year Battery
A built-in lithium battery designed to last approximately ten years from activation. Nothing to replace and nothing to remember.
Methane Detection
A dedicated sensor calibrated for natural gas, alarming at 10% of the lower explosive limit.
85 dB Alarm
Produces an 85 dB audible alarm measured at 10 feet.
Test Button
The TEST button checks the audible alarm and the indicator sequence.
Warning System
Three colored lights separate normal power, a fault or low battery, and a live gas alert.
Simple Installation
Supplied mounting hardware, no wiring. Battery-powered alarms may be installed by the owner, maintenance staff or the occupant in qualifying existing buildings.
10-Year Battery
A built-in lithium battery designed to last approximately ten years from activation. Nothing to replace and nothing to remember.
Methane Detection
A dedicated sensor calibrated for natural gas, alarming at 10% of the lower explosive limit.
85 dB Alarm
Produces an 85 dB audible alarm measured at 10 feet.
Test Button
The TEST button checks the audible alarm and the indicator sequence.
Warning System
Three colored lights separate normal power, a fault or low battery, and a live gas alert.
Simple Installation
Supplied mounting hardware, no wiring. Battery-powered alarms may be installed by the owner, maintenance staff or the occupant in qualifying existing buildings.
ChesGuard CG-GD1 10-Year Natural Gas Alarm
ChesGuard Protection
Detect Early.
Protect Always.
ChesGuard LLC builds detection equipment for one purpose, which is warning a household early enough to act. Every CG-GD1 carries an Intertek ETL listing against UL Standard 1484 under control number 5017086.
Questions People Ask Before Buying
How many alarms do I need?
One or more alarms may be required in each dwelling unit. Every fuel-gas-burning appliance must be covered by an alarm installed in the same room and within the required placement distance. One alarm may cover multiple appliances only when a single compliant location serves all of them.
In practice, an apartment with a range in the kitchen and a gas dryer in a separate laundry room will normally need two alarms, because no single position can sit in both rooms within the required distance. A kitchen range and a gas water heater in the same room can often be covered by one.
Will my carbon monoxide alarm detect a natural gas leak?
No. A carbon monoxide alarm detects a byproduct of incomplete combustion, not the gas itself. Natural gas is methane, and detecting it needs a sensor built for it. The two alarms answer different questions, and a home with gas appliances needs both.
Do I need an electrician to install it?
Not for a qualifying battery-powered installation. New York City requires a licensed electrical contractor and permits for line-powered alarms. A battery-powered alarm like the CG-GD1 may be installed by the building owner, maintenance personnel or the occupant. Different power requirements may apply to new buildings completed on or after January 1, 2027.
Where exactly should it go?
On a wall in the same room as the gas appliance, 3 to 10 feet from it measured horizontally, and 6 to 12 inches below the ceiling. Keep it at least 5 feet from a cooking appliance or cooktop hood. Natural gas is lighter than air, which is why the alarm mounts high.
Why do I need one if I can smell gas?
The odorant added to natural gas is typically noticeable at around 25% of the lower explosive limit, and this alarm is calibrated to sound at 10%. A cold, age, medication or simply being asleep can remove the warning that smell is supposed to give you. It is still possible to smell gas before the alarm activates, which is why the manual tells you to leave immediately and call 911 or your gas utility if you smell gas at any time.
Does the battery need replacing?
No. The lithium battery is built into the alarm and is designed to last approximately ten years from activation. The alarm itself reaches end of service life approximately ten years after installation, signaling with three beeps and three yellow flashes every 60 seconds, and the whole unit is then replaced.
Does this satisfy NYC Local Law 157?
The rule requires an alarm listed and labeled to UL 1484. The CG-GD1 is ETL Listed by Intertek as conforming to UL Standard 1484 under control number 5017086. The Department of Buildings does not endorse specific products, so confirm placement and record keeping against the official guidance linked on our Local Law 157 page.
