The workhorse in every HVAC Load Reduction (HLR) module is the sorbent cartridge. Each cartridge contains a unique non-toxic and eco-friendly sorbent blend designed to capture over 250 types of volatile organic compound (VOCs,) carbon dioxide, ozone, and aldehydes.

While fiber filters only pick-up solid particles, enVerid’s sorbent cartridges remove all contaminants of concern called out by the U.S. Green Building Council (USGBC). In fact, enVerid’s HLR technology is one of the only air cleaning products to have undergone independent lab testing for cleaning efficiency for all contaminants of concern using ASHRAE Standard 145.2, the Laboratory Test Method for Assessing the Performance of Gas-Phase Air-Cleaning Systems. Independent lab testing has also confirmed that enVerid’s sorbents produce zero byproducts.

The newest generation of enVerid’s sorbent cartridges lasts two years before they need to be replaced. Replacement cartridges may be purchased through enVerid’s local Manufacturer Representative or factory direct.

Would you like to order replacement HLR Cartridges?

How enVerid Sorbents Work

Advanced sorbents clean the air

During scrubbing mode, also called adsorption, the HLR module’s fans direct air through the sorbent cartridges. As the air passes through the cartridges, contaminants bind to the sorbent inside, which removes them from the air. Afterward, the air is contaminant-free and ready to breathe.

When CO2 scrubbing is required, sorbent cartridges require periodic regeneration to stay at maximum efficiency. During the regeneration process, the cartridges are heated up to 130-150 degrees Fahrenheit. At this temperature, the sorbent releases the contaminants, which are immediately vented outside via the building exhaust. Once the sorbent is clean, it is ready to start removing contaminants from the indoor air again. The cycle of adsorption and regeneration is completely automated based on a pre-defined schedule configured during start-up.

Regeneration is not required in low-density applications where CO2 is not a major factor. The HLR 200M and HLR 15R products are designed for regeneration. The HLR 100M product does not use regeneration.

What Makes enVerid Sorbents Special

Sorbents have been safely used for decades to purify air in places like the International Space Station, remove odors in buildings, and protect workers exposed to products that produce unhealthy fumes. In all of these cases, gaseous contaminant molecules attach to the sorbent, making the air healthy again.

enVerid’s sorbents are highly selective in their ability to remove unwanted indoor air contaminants and represent breakthroughs in material science discovered by national laboratories and university research groups and further developed by enVerid scientists and engineers.

enVerid’s sorbent mixture targets specific indoor air contaminants including:

  • Carbon Dioxide: enVerid has reengineered sorbents initially developed to address atmospheric CO2 for indoor use
  • Volatile Organic Compounds: our sorbent captures VOCs using novel synthetic carbon technology previously used in military and industrial settings
  • Formaldehyde: the sorbent mixture includes high-capacity formaldehyde-selective sorbents developed by enVerid

enVerid’s sorbent blend is unique in two ways: it captures all common contaminants in buildings and it can regenerate at very low temperatures, enabling it to regain its capacity and cleaning efficiency over and over. enVerid’s sorbent is the first of its kind to be able to regenerate at temperatures below 1,000 degrees Fahrenheit, making it the only sorbent safe for regular indoor use. 

enVerid HLR Module Outdoor HVAC

Watch this short video to learn how to replace HLR Cartridges