HRV or ERV? Compare Proposals

DOE describes heat-recovery ventilators (HRVs) and energy-recovery ventilators (ERVs). Both exchange heat and contain a heat exchanger, one or more fans and controls. ERVs additionally transfer some water vapor, which DOE says helps indoor humidity stay more constant. DOE guide

Compare the exact models and their documentation: what each transfers, the proposal’s moisture intent, its design basis and unanswered questions. Ask the proposer to connect that basis to this building. Mark missing information unresolved.

DOE’s general description does not select a model for this home or establish humidity, climate suitability, health, energy-cost, sizing or control outcomes. Obtain a project-specific explanation before choosing.