Laboratory Evaluation of Energy Recovery Ventilators

Stacey Rothgeb, D. Kosar, Stacey Rothgeb (NREL Technical Monitor)

Research output: NRELSubcontract Report


Over the years, building scientists have characterized the relationship between building airtightness, exhaust-only appliances airflows, and building depressurization. Now, as the use of deep retrofit measures and new construction practices is growing to realize lower infiltration levels in increasingly tighter envelopes, performance issues can arise with the operation of exhaust-only appliances in a depressurized home. As the depressurization levels climb in tighter homes, many of these exhaust-only appliances see their rated airflows reduced and other related performance issues arise as a result. If sufficiently depressurized, atmospherically vented combustion appliances that may be present in the home can backdraft as well. Furthermore, when exhaust-only appliances operate and the tight home becomes depressurized, water vapor intrusion from outdoors can raise additional issues of mold in the building envelope in more humid climates.
Original languageAmerican English
Number of pages41
StatePublished - 2016

Bibliographical note

Work performed by Building America Partnership for Improved Residential Construction (BA-PIRC), Des Plaines, Illinois

NREL Publication Number

  • NREL/SR-5500-66560

Other Report Number

  • DOE/GO-102016-4921


  • building america
  • building depressurization
  • ventilators


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