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Project Launch: 04/01/2018

Partners: Slipstream, enVerid

This pilot assessed the energy and indoor air quality impacts of enVerid’s HVAC Load Reduction Module, a new adsorbent air cleaning technology that filters, cleans and recycles indoor air to reduce a building’s need for energy-intensive ventilation.


Adsorbent air cleaning technology is intended to reduce the amount of energy used by commercial HVAC systems. The enVerid HLR Module adsorbs gas-phase contaminants from ventilation air, allowing outside air intake to be reduced.

Phase I of this pilot included developing energy models for technology deployment, completing a technology risk management whitepaper and performing outreach for a field study. Phase II evaluated the energy use and non-energy benefits of a participating commercial building customer.


  • Cleaning air with the HLR Modules and reducing outdoor airflow rates resulted in a net energy savings of 136,363 kWh for the commercial building customer, or 3.50 kWh per cfm. These savings are lower than those predicted by the manufacturer, in part due to an unexpected additional amount of energy needed to operate the HLR Modules.
  • Most of the energy savings from adsorbent air cleaning comes from reducing the energy needed to condition incoming outdoor air to an appropriate temperature and humidity.
  • Indoor air quality test results suggest that the levels of contaminants of concern remained within acceptable limits and are similar to baseline conditions.
  • To maximize energy savings and cost benefits for customers, adsorbent air cleaning technology should be targeted relatively narrowly at customers with the right building characteristics.

Read the executive summary.