What is the recommended rate of air changes per hour for residential HVAC systems?

The recommended rate of air changes per hour for residential HVAC systems typically falls within the range of 1 to 2 changes. This guidance aligns with the goal of maintaining good indoor air quality while ensuring energy efficiency. A lower rate of air changes, such as 1 to 2 per hour, is generally sufficient for most residential settings where the goal is to replace stale air with fresh air while minimizing energy loss. This is especially important in homes that are well-sealed for energy considerations, as too many air changes could lead to higher energy costs and uncomfortable indoor conditions.

By focusing on this range, homeowners can ensure adequate ventilation without compromising the thermal comfort provided by their HVAC systems. Achieving the right balance between ventilation needs and energy efficiency is crucial in residential HVAC design and operation.