As we successfully reduce the sensible loads of our buildings by improving building materials, assemblies and integration of assembly elements, the sensible heat ratios of our homes are changing. Latent loads of those spaces remain the same or increase due to ventilation requirements while latent capacities of mechanical systems decrease with improving efficiencies. Discussions of ventilation latent loads have been on-going for decades but our industry has yet to effectively incorporate humidity considerations into our mechanical design and selection process.
Holistic HVAC solutions include high efficiencies mechanical systems, thoughtful ventilation strategies and consideration of humidity. The goal of this session is to get the principles of ventilation latent loads into our working knowledge by quantifying those loads for high performance projects in a variety of locations. We'll use 62.2 2010 and 2016 ventilation rates and psychrometric weather data and additionally consider the impacts of an ERV on these loads.