ERV / HRV

Energy Recovery Ventilator / Heat Recovery Ventilator

Balanced whole-house ventilation that swaps stale indoor air for filtered outdoor air while recovering most of the heat and moisture, so ventilating costs little comfort.

An ERV or HRV is a balanced mechanical ventilation system that continuously pulls filtered outdoor air into your home and pushes stale indoor air out, passing the two streams through a core that transfers heat (HRV) and both heat and moisture (ERV) between them. That recovery is the point. Outdoor air exchange is the only mechanism that lowers indoor CO2, dilutes cooking and material VOCs, and carries excess moisture out, but opening windows costs comfort and can pull outdoor particles in. An ERV or HRV does the same exchange on purpose, with a MERV-13 or HEPA-grade intake filter holding back outdoor PM2.5, which makes it the structural answer for homes where bedroom CO2 runs high and outdoor air is chronically poor. It is a capital install best handled by an HVAC contractor, not a Stasis-delivered fix. The recovery core moves energy between the air streams and does not filter the air, so the intake filter does the particle work and a range hood vented outside still handles the gas-stove source. For most homes the open-door and cracked-window steps, plus an air mover in the bedroom, reach the overnight sleep target first, and an ERV or HRV is the step you take when those are not enough.