VIGAS Natural Gas Alarm FAQ: Product, Installation & NYC Questions

VIGAS is a standalone residential natural gas alarm manufactured by NEXELEC.

The alarm continuously monitors the surrounding air for natural gas, primarily methane. If the detected methane concentration reaches the alarm threshold, VIGAS provides audible and visual warning.

VIGAS is designed as a self-contained alarm with an integrated sealed lithium battery, meaning it does not require an electrical outlet or electrical wiring for normal operation.

Its compact format, long service life and digital identification features make it suitable for both individual residential installations and larger property portfolios.

View VIGAS product specifications.

VIGAS detects natural gas, primarily methane (CH4).

Methane is the principal component of the natural gas commonly supplied to residential buildings.

VIGAS continuously monitors for methane and activates its audible and visual warning when the detection threshold is reached.

VIGAS should not be treated as a universal combustible-gas detector. Product selection should always be based on the gas that needs to be detected and the applicable installation requirements.

No.

VIGAS is a natural gas alarm, primarily designed to detect methane. It does not replace a carbon monoxide alarm.

Carbon monoxide and natural gas represent different hazards:

• natural gas alarms detect leaking fuel gas before combustion;
• carbon monoxide alarms detect CO produced by incomplete combustion.

Properties containing gas-burning appliances may therefore need both natural gas detection and carbon monoxide detection depending on applicable requirements.

Read our Natural Gas Alarm vs. Carbon Monoxide Alarm guide.

No.

VIGAS is not a smoke alarm.

It is designed for residential natural gas detection, primarily methane. Smoke alarms, carbon monoxide alarms and natural gas alarms perform different detection functions and should not be treated as interchangeable devices.

Property owners should review all applicable life-safety requirements for the building rather than assuming that one type of alarm replaces another.

VIGAS is designed and documented as a natural gas alarm for methane detection.

It should not be selected as a propane alarm unless the current product documentation specifically confirms suitability for that application.

When selecting any gas alarm, the device specification should match the fuel gas that needs to be detected.

For current VIGAS specifications, review the VIGAS Datasheet.

VIGAS triggers its audible and visual warning at 10% of the Lower Explosive Limit (LEL) for methane.

The Lower Explosive Limit represents the concentration at which a fuel-gas and air mixture can begin to become ignitable.

A 10% LEL alarm threshold is therefore designed to provide warning before methane reaches the Lower Explosive Limit.

The VIGAS alarm threshold should not be interpreted as meaning that the surrounding air contains 10% methane.

VIGAS provides an audible alarm rated at 85 dB at 10 feet, together with visual LED indicators.

The combination of audible and visual warning is designed to provide clear status communication when the device detects a hazardous natural gas concentration or communicates device status.

For complete alarm and indicator behavior, refer to the current VIGAS User Guide.

VIGAS uses MEMS semiconductor sensor technology designed for stable detection of natural gas, primarily methane.

The sensor continuously monitors the surrounding air during normal operation.

Sensor technology is only one component of overall product performance. Alarm threshold, product listing, installation location, environmental conditions and manufacturer instructions must also be considered when selecting and installing a natural gas alarm.

No.

VIGAS uses an integrated sealed lithium battery and therefore does not require an electrical outlet for normal operation.

This can simplify deployment in existing residential properties where adding outlets or electrical wiring near gas appliances would otherwise increase installation complexity.

However, NYC power-source requirements can depend on when a building was completed. Property owners planning a New York City deployment should review the applicable DOB requirements before selecting a power configuration.

Read our VIGAS and NYC Local Law 157 guide for more detail.

No.

VIGAS is a battery-powered standalone natural gas alarm and does not require electrical wiring for normal operation.

This distinguishes it from hardwired fuel-gas warning equipment that may require electrical installation, permits and a New York City Licensed Electrical Contractor.

The appropriate power source still depends on the building and applicable requirements.

The sealed lithium battery is designed to operate throughout the alarm’s 10-year service life under normal operating conditions.

Routine battery replacement is therefore not required during that designed service life.

This can be useful for property managers because it reduces the need to manage periodic replacement of removable batteries across large detector fleets.

The complete alarm should still be tested, maintained and ultimately replaced according to the current manufacturer instructions and applicable requirements.

VIGAS uses a sealed integrated lithium battery designed for the alarm’s service life.

It is not intended as a device where occupants periodically remove and replace conventional batteries.

At the applicable end of product life, the alarm should be replaced according to the manufacturer’s instructions rather than treated as a reusable device with a routine battery replacement cycle.

VIGAS is designed to simplify maintenance because its sealed battery does not require routine battery replacement during its designed service life.

However, “no routine battery replacement” does not mean “no maintenance responsibilities.”

Natural gas alarms should still be tested and maintained according to the manufacturer instructions and applicable building requirements.

Property managers should also track:

• installation date;
• device location;
• alarm identification;
• test or maintenance information where applicable; and
• expected replacement date.

VIGAS includes a front-facing Test/Hush button for functional testing and temporary alarm silencing as described in the current User Guide.

Testing should always be performed according to the manufacturer instructions rather than by introducing uncontrolled quantities of gas near the device.

For the correct testing procedure and interpretation of VIGAS indicator signals, refer to the current VIGAS User Guide or VIGAS support documentation.

VIGAS includes QR-based device identification.

The QR code can help property teams associate an individual physical alarm with digital information such as its installation location and maintenance record.

This becomes particularly useful across multifamily properties where hundreds or thousands of alarms may need to be identified individually.

A structured device identification process can help answer questions such as:

• Which alarm is installed in Apartment 4B?
• When was it installed?
• Which room is it in?
• When is it expected to require replacement?
• Has the device been recorded in the property inventory?

NAVIXIS is NEXELEC’s digital platform for supporting installation and maintenance tracking across fleets of safety devices.

For VIGAS deployments, QR-based identification combined with NAVIXIS can help property teams organize information associated with individual alarms across multiple dwelling units or buildings.

Digital fleet management does not replace regulatory inspection, installation, maintenance or record-keeping obligations. It is a tool designed to help organize device information at scale.

The precise product wording should be:

VIGAS is ETL Listed by Intertek and conforms to UL 1484 for residential natural gas alarm applications.

ETL is a product certification mark administered by Intertek.

UL 1484 is the safety standard referenced for residential gas detectors and alarms.

For accuracy, NEXELEC uses the wording “ETL Listed by Intertek and conforms to UL 1484” rather than describing VIGAS simply as “UL certified.”

The New York City Department of Buildings does not endorse specific natural gas alarm manufacturers or models.

DOB guidance states that applicable natural gas alarms must meet the relevant listing and labeling requirements, including UL 1484.

VIGAS is ETL Listed by Intertek and conforms to UL 1484, but product certification alone does not determine whether an entire building or installation complies with NYC requirements.

Building type, completion date, power source, appliance location, alarm placement and other applicable requirements must also be evaluated.

Official source: NYC Department of Buildings — Natural Gas Detection Devices FAQs.

It is more accurate to evaluate the product and the installation separately.

VIGAS is ETL Listed by Intertek and conforms to UL 1484, which is relevant to NYC’s listing requirements for applicable residential natural gas alarms.

However, a product alone does not make a property compliant with Local Law 157.

Compliance can also depend on:

• whether the building is covered;
• building completion date;
• gas appliance location;
• power-source requirements;
• the number of alarms required;
• installation location;
• manufacturer instructions;
• maintenance;
• notices; and
• record keeping.

For a detailed assessment, read VIGAS Natural Gas Alarm and NYC Local Law 157: A Guide for Property Owners.

The current installation deadline is January 1, 2027.

On June 15, 2026, the New York City Department of Buildings confirmed that it had identified at least four distinct manufacturers of qualifying battery-powered natural gas alarms.

As a result, DOB confirmed that the installation date will not be extended beyond January 1, 2027.

Official source: NYC Department of Buildings — Deadline to Install Natural Gas Alarms is January 1, 2027.

For the complete regulatory overview, read our NYC Local Law 157 Natural Gas Alarm Requirements guide.

Where a fuel-gas-burning appliance is installed within a dwelling, current NYC DOB rules generally require the natural gas alarm to be installed:

• in the same room as the appliance;
• at least 3 feet from the appliance;
• not more than 10 feet from the appliance;
• measured horizontally.

Where a natural gas alarm is installed on a wall, the NYC rule generally requires it to be located not more than 12 inches from the ceiling.

Manufacturer instructions and applicable exceptions must also be considered.

For detailed placement guidance, see Where to Install a Natural Gas Alarm in NYC.

Official rule: 1 RCNY §908-02.

Because VIGAS is battery-powered, current NYC DOB guidance is especially relevant.

DOB states that natural gas alarms powered by battery or plug-in AC receptacle may be installed by someone other than a New York City Licensed Electrical Contractor, including the building owner, building maintenance personnel or dwelling unit occupant.

Hardwired natural gas alarm installations are subject to different installer requirements.

Property owners should still verify the requirements applicable to the particular building and installation.

Official source: NYC DOB Natural Gas Detection Devices FAQs.

Not necessarily.

According to NYC DOB guidance, natural gas alarms are not required within dwelling units that do not contain gas appliances under the applicable Local Law 157 rules.

Where a fuel-gas-burning appliance is present within a covered dwelling, the applicable natural gas alarm requirements should be reviewed.

That is why a property survey should identify gas appliances at the dwelling level rather than simply multiplying the number of apartments by one alarm.

Read Who Must Comply With NYC Local Law 157? for more detail.

Not automatically.

Current DOB guidance distinguishes between buildings completed before and after January 1, 2027 for fuel-gas warning equipment power-source requirements.

DOB states that a building issued a Temporary Certificate of Occupancy or Certificate of Occupancy before January 1, 2027 may use a monitored battery as a primary power source for fuel-gas warning equipment, subject to the applicable requirements.

Buildings issued a TCO or CO after January 1, 2027 are subject to primary and secondary power-source requirements.

For this reason, VIGAS should be evaluated against the specific building and applicable DOB requirements rather than assuming that one configuration is appropriate for every project.

See the NYC DOB Natural Gas Detection Devices FAQs.

VIGAS is designed for residential natural gas detection and can be evaluated for deployment across multifamily residential portfolios where its specifications and power source are appropriate for the building.

The product’s sealed battery and QR-based identification can be particularly useful when property teams need to deploy and track large numbers of alarms.

A multifamily deployment should begin with a property survey to determine:

• which buildings are affected;
• which dwelling units contain gas appliances;
• where each alarm should be positioned;
• applicable power-source requirements;
• how installation access will be organized; and
• how devices will be recorded and tracked.

For a detailed workflow, see our VIGAS and NYC Local Law 157 Guide.

There is no universal number of VIGAS alarms that applies to every property.

The required number of natural gas alarms can depend on:

• the building type;
• number of dwelling units;
• location and number of fuel-gas-burning appliances;
• room configuration;
• applicable NYC rules; and
• manufacturer installation requirements.

For that reason, property managers should conduct a building and dwelling survey before determining purchasing quantities.

A portfolio with 100 apartments should not automatically be assumed to require exactly 100 alarms.

A structured VIGAS installation record can include:

For large portfolios, using the same data structure across every building makes future maintenance and replacement planning easier.

VIGAS is designed around a 10-year service life.

The expected replacement date should be recorded when the device is installed so that property teams can identify alarms approaching the end of their useful life.

Actual replacement should follow the product’s end-of-life indications, manufacturer instructions and applicable regulatory requirements.

For multifamily portfolios, replacement planning is easier when installation dates and device identities are recorded from the beginning of the deployment.

Yes. VIGAS is designed for residential natural gas detection.

A homeowner can evaluate VIGAS for an applicable residential installation, while property managers may additionally benefit from QR-based identification and portfolio-level device tracking.

In all cases, product selection and installation should be based on:

• the fuel gas being detected;
• applicable building requirements;
• product specifications;
• installation location; and
• manufacturer instructions.

New York City users should additionally verify the current DOB and HPD requirements applicable to their property.

Current VIGAS product and technical information is available from NEXELEC.

Product specifications:
VIGAS Natural Gas Alarm

Technical datasheet:
VIGAS Datasheet

NYC installation and Local Law 157 guide:
VIGAS Natural Gas Alarm and NYC Local Law 157

NYC regulatory requirements:
NYC Local Law 157 Natural Gas Alarm Requirements

For product availability, distributor opportunities, multifamily deployments and quotation requests, contact NEXELEC.

View the VIGAS Natural Gas Alarm

Request a VIGAS quote

Contact NEXELEC

Property managers planning a large deployment should ideally provide information such as the number of properties, approximate number of dwelling units, building locations and expected project timeline so the project can be evaluated efficiently.

For New York City regulatory questions, property owners should rely on current primary sources.

NYC Department of Buildings — Natural Gas Detection Devices FAQs
https://www.nyc.gov/site/buildings/property-or-business-owner/natural-gas-detector-faqs.page

NYC DOB — Deadline to Install Natural Gas Alarms is January 1, 2027
https://www.nyc.gov/assets/buildings/pdf/natural_gasalarm-sn.pdf

1 RCNY §908-02 — Natural Gas Alarm Installation and Location
https://www.nyc.gov/assets/buildings/rules/1_RCNY_908-02.pdf

1 RCNY §3616-06 — NFPA 715 Amendments
https://www.nyc.gov/assets/buildings/rules/1_RCNY_3616-06.pdf

NYC HPD — Smoke, Carbon Monoxide and Natural Gas Detectors
https://www.nyc.gov/site/hpd/services-and-information/detectors.page