Controlling moisture is a major component for controlling indoor air quality. The first step is to keep the water out. EPA’s Indoor airPLUS Program starts with bulk moisture management, but there are other key factors to consider with regard to moisture control.

Relative humidity (RH) conditions vary throughout the country. In hot, humid climates, Indoor airPLUS has previously addressed moisture vapor control with additional requirements for HVAC controls or dedicated dehumidification. Controlling the relative humidity in the entire home is often one of the biggest impacts to truly achieving a healthy home. Can an energy recovery ventilator (ERV) or heat pump water heater be used in lieu of a dehumidifier? What can be done if the house is too dry?

This presentation will address the health impacts of controlling relative humidity in homes, what to look for in homes, questions to help occupants understand if they have a health-related moisture problem, and how to successful apply moisture control strategies to the entire home. We will discuss why traditional methods may no longer effectively meet new moisture demands and the building science perspective on the challenges that builders and building performance contractors must learn. This session will also examine some common challenges and best practices that address moisture vapor issues. Attendees will have a chance to preview various approaches to controlling RH and learn how requirements in EPA’s Indoor airPLUS Program are continuing to evolve in Version 2 of the Construction Specifications.

Learning Objectives: 

Understand a variety of approaches to control moisture and RH in homes.
Learn how Indoor airPLUS addresses the complexities of RH using both structural and mechanical approaches.
Learn how to decide when additional humidification or dehumidification is necessary
Hear how you can provide valuable feedback to improve EPA’s voluntary programs.

Instructors: Paul Raymer, David Treleven, & Nikki Krueger

CEU's: 1 AIA, 1 BPI, 1 NAHB, 1 NARI, 1 RESNET, and 1 GENERAL