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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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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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Whole House Ventilation Strategies for Existing Homes

Guide

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

Duct Leakage Testing for Central Exhaust and Ventilation Systems in Multifamily Buildings

Guide

Guide describing the testing of duct leakage in central ventilation systems for multi-story, multi-family buildings.