How HLR Works

The diagram below illustrates the HVAC operation using ventilation only and ventilation and scrubbing.

Ventilation and Scrubbing HLR diagram

HLR 15R Outdoor Module has Four Integrated Capabilities

Adsorption Icon
Indoor Air Scrubbing (Adsorption Mode)

A fraction of the return air stream is directed through the HLR 15R Module to remove indoor-generated contaminants using a blend of sorbents that capture carbon dioxide (CO2) along with a wide range of volatile organic compounds (VOCs), aldehydes, ozone, acids and particulate matter (PM2.5) resulting in cleaned air that flows back into circulation.

Air Intake Icon
Outside Air Intake Reduction

Outside air reduction leads to lower cooling and heating energy consumption2 and reduces the intake of outdoor-generated pollutants. By following ASHRAE Standard 62.1 IAQP, HLR Technology enables significant outside air reduction relative to the typically prescribed amounts, while maintaining indoor air quality.

Regeneration Icon
Automatic Self-Cleaning (Regeneration Mode)

The sorbents are designed to release captured contaminants upon heating. The HLR 15R Module is equipped with a built-in heater and performs a periodic regeneration process to clean the sorbents and expel contaminants outside the building. Regeneration is managed for optimal performance and minimal energy use.

Monitoring Icon
Monitoring and Reporting

HLR software communicates continuously with the onboard sensors to record, report and optimize all aspects of the HLR 15R Module’s operation. The system provides secure, real-time reporting of IAQ and operating parameters to the enVerid Cloud™.

1 The mass balance analysis is performed per contaminant and per zone to ensure all contaminants are properly below their established limits. These “per zone” outside air CFMs are summed to yield the total ventilation required for the building. enVerid’s IAQP calculator makes it easy.

2 When economizer operation is favorable, outside air is increased and the HLR module is in standby.

What’s Inside the HLR 15R Outdoor Module?


HLR 15R Outdoor Module Adsorption and Regeneration Modes

The diagrams below depict the “under-the-hood” HLR 15R Module operation during the adsorption and regeneration modes.


HLR 15R Outdoor Module Drawings


HLR 15R Outdoor Module Specifications

Module Shipping/Lifting Weight930 lbs422 kg
Cartridge Shipping Weight200 lbs91 kg
Installation/Operating Weight960 lbs435 kg
Height (including Rail)49”1,245 mm
Width (Includes Exhaust Hood)87”2,210 mm
Depth (Allow Additional 48” / 1,219 mm Clearance on Front and Back for Service)36”914 mm
Ducts (Indoor Air Inlet and Clean Air Outlet)65” x 22.75”165 mm x 578 mm
Outdoor InstallationInsulated curb or above roof on equipment support
ConstructionDouble-wall, insulated, powder-coated galvanized steel
Sorbent Cartridges per Set12
Typical Airflow (Adsorption)700-800 SCFM1,190-1,360 CMH
Typical Airflow (Regeneration)250-300 SCFM425-510 CMH
Static Pressure added to AHU fanNone
Sound Power Level68 dB
Maximum Allowed External Static Pressure0.2” WG / 50 Pa
Operating Life20+ years with scheduled maintenance
Cellular Link3G / 4G
BMS IntegrationBACnet over MSTP or Hardwire
Voltage (VAC)Frequency (Hz)MCAMOCP
208 V60 Hz34.3 Amp35 Amp
277 V60 Hz30.6 Amp35 Amp
240 V50 Hz28.4 Amp30 Amp
208 V277 V240 V
Adsorption Mode300 W300 W300 W
Regeneration Mode5800 W6800 W5540 W
Start/StopBinary Input to HLR Module
Fire SignalBinary Input to HLR Module
HLR StatusAnalog Output from HLR Module
Indoor Air CO2 SensorAnalog Output from HLR Module
Indoor Air TVOC SensorAnalog Output from HLR Module

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