2023 Residential Whole-House Mechanical Ventilation

Mechanical ventilation is as important to indoor air quality as it is for energy conservation. Part 2 of this course will cover the 2021 IECC, 2021 International Residential Code (IRC), and Massachusetts amendments relating to whole-house mechanical ventilation system requirements. This will include when whole-house ventilation is required, how to calculate the minimum design airflow rate, and how to verify installed airflow rates. Part 2 will also provide an overview of different ventilation systems – exhaust only, supply-only and balanced ventilation, including Energy Recovery Ventilators (ERVs) and Heat Recovery Ventilators (HRVs) – along with the pros and cons of each type of system.