ASHRAE 241 Standards for Infectious Aerosol Control

The ASHRAE 241 test evaluates a building's equivalent clean air delivery rate (EADR), measuring how effectively the HVAC system reduces infectious aerosol concentrations. Filters must achieve MERV 13 or higher under ASHRAE 52.2 test protocols, including Appendix J conditioning for electronic air cleaners. ECOairflow's M-Series filters are Appendix J certified at MERV 13-A through 16-A, confirming consistent in-situ performance across the full filter lifecycle.

The M-Series 2" Hybrid E.A.C. (Model 2300 M-Series) and the Dynamo 2" E.A.C. (Model 2300) both comply with ASHRAE 241 (2023). The M-Series achieves MERV 14A or 16A under Appendix J certification, and the Dynamo 2" exceeds the ASHRAE 241 minimum at MERV 14 powered. Both filters capture particles down to 0.001 microns, covering the critical size range for airborne infectious aerosols.

ASHRAE 170 governs ventilation and filtration in healthcare facilities, specifying MERV 14 for emergency and treatment rooms and MERV 16 for operating rooms. ASHRAE 241 applies infection-control filtration requirements to all occupied building types. ECOairflow's M-Series satisfies both standards simultaneously — ASHRAE 170 MERV 14A or 16A for clinical spaces and ASHRAE 241 infection-control requirements — using a single 2" hybrid filter pad.

Yes. ECOairflow's ASHRAE 241 compliant filters feature extremely low pressure drops (0.13–0.37 in.w.c.) compared to traditional MERV 8 + MERV 14 bag filter trains (0.6–1.2 in.w.g.). An independent hospital study documented a 54% reduction in fan power consumption over 12 weeks, demonstrating that facilities can achieve ASHRAE 241 infection-control compliance without the significant energy penalty typical of high-MERV conventional filtration systems.

Yes — the M-Series Hybrid E.A.C. maintains its full rated MERV performance whether powered, unpowered, or conditioned under ASHRAE 52.2 Appendix J protocol. This is a unique and critical capability for medical treatment rooms and healthcare environments where filter performance must be assured even during power loss or scheduled shutdowns, ensuring continuous infection-aerosol control under all operating conditions.

ECOairflow provides comprehensive submittal documentation including ASHRAE 241 and ASHRAE 170 compliance documentation, ASHRAE 52.2 Appendix J certification data, PM0.1 independent lab-test reports, UL 2998 Zero Ozone verification, LEED EQ credit documentation, and CSA Z317.2 compliance data. All documents are available on request by contacting sales@ecoairflow.com or calling 1-877-347-3569.