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These ERV/HRV configurations are NOT recommended because outdoor air can be sucked back into the ERV/HRV before being distributed to the living space

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This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home

This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home

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If integrating an ERV/HRV with the heating/cooling duct system, add dedicated ducts for either the supply or return side to prevent short-circuiting of air distribution

If integrating an ERV/HRV with the heating/cooling duct system, add dedicated ducts for either the supply or return side to prevent short-circuiting of air distribution

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Karuna Passive House Ventilation System

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Video discussing the heat recovery ventilation (HRV) system in a passive house.

Whole House Ventilation Strategies for Existing Homes

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Guide describing how to select and install whole-house ventilation systems for existing homes.

Whole-House Ventilation Strategies for New Homes

Guide

This guide describes how to install a whole-building ventilation system to provide adequate dilution of indoor air contaminants.

Ventilation and Exhaust Strategies for Multifamily Housing

Guide

Guide presenting central and individual dwelling unit ventilation and exhaust strategies for multifamily construction.