NES Series 400 Gas Monitor, developed by AGS, simultaneously detects CO and NO2 on a single, UL 2075-certified device
BOSTON, Nov. 12, 2026 /PRNewswire-PRWeb/ -- Nagle Energy Solutions (NES), developer of patented linear demand-control ventilation (DCV) for enclosed parking garages, today announced a partnership with American Gas Safety (AGS) that makes the NES Series 400 Dual Combined Gas Monitor standard on all new NES systems. Developed by AGS and produced for NES under the NES brand, the Series 400 monitors carbon monoxide (CO) and nitrogen dioxide (NO2) in a single unit and is certified to UL 2075, the safety standard for gas detectors used in parking garages.
Beginning with its 2021 edition, the International Mechanical Code (IMC) requires enclosed parking garages that control ventilation automatically to detect both CO and NO2, using detectors listed to UL 2075 (Section 404.1). CO alone is no longer enough, because diesel exhaust and other contaminants can reach harmful levels before CO crosses its alarm threshold. Many garages built to earlier codes monitor only CO, often with sensors that aren't certified to UL 2075.
"The key to our success across more than 50 installations has been measuring air quality accurately enough to fine-tune our control sequence and maximize energy savings," said Frank Nagle, founder and principal partner of NES. "The Series 400 gives our patented controls a code-compliant reading of both gases from a single device, and it cuts the hardware in half compared with separate CO and NO₂ sensors."
"Garage ventilation controls are only as good as the readings they act on. NES has years of field experience with these systems, and the Series 400 gives them reliable CO and NO2 data from a single device. We're glad to work with NES to bring it to garages that need to meet today's code," said Chris May, Executive Director of American Gas Safety.
Because the Series 400 monitors both gases, the NES controller can respond to whichever one rises first.
Key features include:
- Single or dual gas monitoring, configurable on site
- Replaceable, plug-and-play smart sensor modules and non-intrusive calibration
- BACnet MS/TP or Modbus RTU communications over RS-485 (field selectable)
- 0–10V or 4–20mA output, relay output and 24V AC/DC power
- Display screen, RGB LED status indication and NFC app configuration
- Splash guard accessories for an improved IP rating
The Series 400 is offered with both NES product lines: Plug & Play systems for small and mid-size garages and fully engineered Custom Solutions for larger, more complex facilities. NES continues to support its existing installations.
Specifications are available at nagleenergy.com/technical-resources.
About Nagle Energy Solutions
Nagle Energy Solutions (NES) develops patented Linear Demand-Control Ventilation (DCV) for enclosed parking garages, modulating supply and exhaust fan speed in proportion to CO and NO2 levels. Founded in 2009, NES operates in California and Massachusetts and has completed 50+ installations, delivering up to 97% ventilation energy savings vs. always-on fans. Fully engineered Custom Solutions serve large, complex garages, and contractor-installed Plug & Play systems are available nationwide. In Massachusetts, the NES system is approved for Mass Save program sponsorship. Learn more at nagleenergy.com.
About American Gas Safety
American Gas Safety is a leading manufacturer with more than 20 years in the market developing a complete line of high-quality Gas Safety Systems. AGS products have international recognition in accordance with approvals of UL and CE, which has permitted American Gas Safety to introduce its product range into most countries worldwide.
Media Contact
Frank Nagle, Nagle Energy Solutions, 1 4153785560, [email protected], www.nagleenergy.com
SOURCE Nagle Energy Solutions
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